Chevrolet Express 1998 6.5L DSL Turbo Workshop Manual

chevrolet :: Chevy Truck Express 1 Ton Van V8-

6.5L DSL Turbo VIN F (1998)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Component Locations

Alarm Module: Component Locations

Multifunction, Alarm, Chime or Voice Module

For Multifunction, Alarm, Chime, or Voice Module, See: Relays and Modules - Instrument Panel/Audible Warning Device Control Module/Locations

Passlock Module

EVO/PASSLOCK Module

Below the center of the IP

Passlock Module

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Component Locations > Page 8

Passlock Module

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > PASSLOCK Module Connector

Passlock Module Connector

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > PASSLOCK Module Connector > Page 11

Vehicle Immobilizer Module Connector

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair > PASSLOCK Reprogramming Auto Learn

Alarm Module: Service and RepairPASSLOCK Reprogramming Auto Learn
PASSLOCK REPROGRAMMING AUTO LEARN

IMPORTANT:

If a new vehicle/powertrain control module (VCM/PCM) is being installed for the first the manufacturing enable bit will be set and theauto learn procedure may not be necessary.

The following procedure allows for anyone to reprogram the EVO/PASSLOCK module learned data code with any tools, other than the scan tool, whenany of the following parts are replaced:

^ The EVO/PASSLOCK module
^ The PASSLOCK sensor
^ The VCM/PCM

The EVO/PASSLOCK module will set the DTC B3031 in the learn mode when entering the reprogramming procedure.

IMPORTANT: (DTCs)

Erase the PASSLOCK related Diagnostic Trouble Codes that are stored in the VCM/PCM. If there are any powertrain relatedDTCs, record these DTCs then refer Diagnostic System Check. See: Powertrain Management/Computers and Control Systems/Testing and Inspection
The following is the Auto Learn Procedure:

1. Insure the ignition key is in the ON position.2. Clear all EVO/PASSLOCK module and VCM/PCM DTCs. Record and refer any VCM/PCM DTCs to "Diagnostic System Check". See:
Powertrain Management/Computers and Control Systems/Testing and Inspection

3. Momentarily rotate the ignition key to the CRANK position (Do NOT start the vehicle), then release it to the RUN position (Do NOT key OFF in
the process).

4. Wait . Observe the SECURITY indicator. Refer to the following list for the appropriate responses:10 minutes

^

If the PASSLOCK sensor was replaced the SECURITY indicator will flash for the duration.10 minutes

^

If the EVO/PASSLOCK module was replaced, the SECURITY indicator will flash for a few seconds and then remain ON for the remainder ofthe duration.10 minutes

^

If the VCM/PCM was replaced with a new programmed VCM/PCM and connected to the vehicle for the first time, the vehicle will start andthis procedure may not be necessary.

^

If the replacement VCM/PCM was connected to any vehicle at any other time, even momentarily, the SECURITY indicator will flash for a fewseconds and then remain ON for the duration.10 minutes

10 minutes

10 seconds

5. The SECURITY indicator will transition from flashing to ON briefly to OFF after if remaining in the ignition ON position.6. Turn the ignition switch to the OFF position and wait for .7. Repeat steps 3-6 two more times. The new security code is ready to be communicated among the PASSLOCK sensor, EVO/PASSLOCK module
and VCM/PCM. The new password is learned on the next ignition lock cylinder cycle from OFF to CRANK to ON (start attempt).

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair > PASSLOCK Reprogramming Auto Learn > Page 14

Alarm Module: Service and RepairTheft Deterrent Module Bracket Replacement

REMOVAL PROCEDURE

1. Remove the PASSLOCK control module.2. Remove the rivets (3) that retain the PASSLOCK control module bracket to the instrument panel carrier (2).3. Remove the PASSLOCK control module bracket (1) from the vehicle.

INSTALLATION PROCEDURE

1. Position the PASSLOCK control module bracket (1) to the vehicle.2. Install the rivets (3) that retain the PASSLOCK control module bracket to the instrument panel carrier.3. Install the PASSLOCK control module.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair > PASSLOCK Reprogramming Auto Learn > Page 15

Alarm Module: Service and RepairTheft Deterrent Module Replacement (Domestic)

REMOVAL PROCEDURE

1. Push the tab (3) at the rear of the passlock control module in order to release the module from the passlock control module bracket (4).2. Slide the passlock control module (2) out of the passlock control module bracket (4).3. Disconnect the electrical connector (5) from the passlock control module (2).4. Remove the passlock control module (2) from the vehicle.

INSTALLATION PROCEDURE

1. Install the passlock control module (2) to the vehicle.2. Connect the electrical connector (5) to the passlock control module (2).3. Slide the passlock control module (2) in to the passlock control module bracket (4).4. Push down on the passlock control module (2) in order to engage the retaining tab (3) on the passlock control module to the passlock module
bracket (4).

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair > PASSLOCK Reprogramming Auto Learn > Page 16

Alarm Module: Service and RepairTheft Deterrent Module Replacement (Export)

REMOVAL PROCEDURE

1. Remove the engine cover.2. Disconnect the electrical connector from the vehicle immobilizer module.3. Remove the plastic fastener retaining the vehicle immobilizer module to the sound insulation.4. Remove the vehicle immobilizer module from the vehicle

INSTALLATION PROCEDURE

1. Install the vehicle immobilizer module to the vehicle.2. Install the plastic fastener in order to retain the vehicle immobilizer module to the sound insulation.3. Connect the electrical connector to the vehicle immobilizer module.4. Install the engine cover.5. Reprogram the key fob.6. Inspect the system in order to ensure it is operating correctly.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Technical Service Bulletins > OnStar(R) - Analog Only Systems Information

Emergency Contact Module: Technical Service BulletinsOnStar(R) - Analog Only Systems Information

INFORMATION
Bulletin No.: 06-08-64-007A
Date: September 22, 2008

Subject: Information on OnStar(R) Analog-Only Systems

Models
Supercede:

This bulletin is being revised to update the models affected list above. Please discard Corporate Bulletin Number 06-08-46-007 (Section 08 - Body &Accessories).

Vehicles with this equipment will no longer be able to receive OnStar(R) services beginning January 1, 2008. At that time, service will be available onlythrough Dual-Mode (Analog / Digital) equipment. Analog-Only vehicles cannot be upgraded to digital equipment.

Disclaimer

All vehicles equipped with OnStar(R) listed in this bulletin were built with Analog-Only OnStar(R) Hardware. OnStar(R) equipped vehicles withanalog-only equipment were designed to operate only on the analog wireless network and cannot be upgraded for digital network compatibility.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Technical Service Bulletins > OnStar(R) - Analog Only Systems Information >

Page 21

Emergency Contact Module: Technical Service BulletinsOnStar(R) - Aftermarket Device Interference Information

INFORMATION
Bulletin No.: 08-08-46-004
Date: August 14, 2008

Subject: Information on Aftermarket Device Interference with OnStar(R) Diagnostic Services

Models:2009 and Prior GM Passenger Car and Truck (including Saturn)2009 and Prior HUMMER H2, H3 Models2009 and Prior Saab 9-7X
with OnStar(R) (RPO UE1)

This bulletin is being issued to provide dealer service personnel with information regarding aftermarket devices connected to the Diagnostic LinkConnector (DLC) and the impact to OnStar(R) diagnostic probes and Vehicle Diagnostic e-mails.

Certain aftermarket devices, when connected to the Diagnostic Link Connector, such as, but not limited to, Scan Tools, Trip Computers, Fuel EconomyAnalyzers and Insurance Tracking Devices, interfere with OnStar's ability to perform a diagnostic probe when requested (via a blue button call) by asubscriber. These devices also prohibit the ability to gather diagnostic and tire pressure data for a subscriber's scheduled OnStar(R) Vehicle Diagnostic(OVD) e-mail.

These aftermarket devices utilize the Vehicles serial data bus to perform data requests and/or information gathering. When these devices are requestingdata, OnStar(R) is designed not to interfere with any data request being made by these devices as required by OBD II regulations.

The OnStar(R) advisor is unable to definitively detect the presence of these devices and will only be able to inform the caller or requester of theunsuccessful or incomplete probe and may in some cases refer the subscriber/requester to take the vehicle to a dealer for diagnosis of the concern.

When performing a diagnostic check for an unsuccessful or incomplete OnStar(R) diagnostic probe, or for concerns regarding completeness of theOnStar(R) Vehicle Diagnostic (OVD) e-mail, verify that an aftermarket device was not present at the time of the requested probe. Regarding the OVDe-mail, if an aftermarket device is interfering (including a Scan Tool of any type), the e-mail will consistently display a "yellow" indication in diagnosticssection for all vehicle systems except the OnStar(R) System and Tire Pressure data (not available on all vehicles) will not be displayed (i.e. section iscollapsed). Successful diagnostic probes and complete OVD e-mails will resume following the removal or disconnecting of the off-board device.

Disclaimer

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Technical Service Bulletins > OnStar(R) - Analog Only Systems Information >

Page 22

Emergency Contact Module: Technical Service BulletinsOnStar - Analog-Only Systems Information

Bulletin No.: 06-08-46-007
Date: December 13, 2006
INFORMATION

Subject:Information on OnStar(R) Analog-Only Systems

Models:1996-2001 GM Passenger Cars and Trucks

Plus:2002 Buick LeSabre, Rendezvous2002-2003 Buick Century, Regal2002-2005 Buick Park Avenue2002 Cadillac Eldorado, Escalade Models2002 Chevrolet Avalanche, Silverado, Suburban, Tahoe, Venture2002 GMC Denali, Denali XL, Jimmy, Sierra, Yukon, Yukon XL2002 Oldsmobile Intrigue, Silhouette2002-2003 Oldsmobile Aurora2002 Pontiac Aztek, Bonneville, Montana2002-2003 Pontiac Grand Prix
with OnStar(R) (RPO UE1)

All vehicles equipped with OnStar(R) listed in this bulletin were built with Analog-Only OnStar(R) Hardware. OnStar(R) equipped vehicles withanalog-only equipment were designed to operate only on the analog wireless network and cannot be upgraded for digital network compatibility.

Vehicles with this equipment will no longer be able to receive OnStar(R) services beginning January 1, 2008. At that time, service will be available onlythrough Dual-Mode (Analog/Digital) equipment. Analog-Only vehicles cannot be upgraded to digital equipment.

Disclaimer

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Door Lock Control Module

Keyless Entry Module: LocationsDoor Lock Control Module

Front Crossbody Wiring

In the left kick panel.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Door Lock Control Module > Page 27

Instrument Panel Wiring

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 28

EVO/Passlock Module Connector

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > Customer Interest for Relay Module: > 09-06-03-004D > Dec > 10

> Electrical - MIL ON/DTC's Set By Various Control Modules

Relay Module: Customer InterestElectrical - MIL ON/DTC's Set By Various Control Modules
TECHNICAL

09-06-03-004DBulletin No.:

December 08, 2010Date:

Subject:

Intermittent No Crank/No Start, No Module Communication, MIL, Warning Lights, Vehicle Messages or DTCs Set by Various ControlModules - Diagnosing and Repairing Fretting Corrosion (Disconnect Affected Connector and Apply Dielectric Lubricant)

Models:

2011 and Prior GM Passenger Cars and Trucks

Attention:

This repair can be applied to ANY electrical connection including, but not limited to: lighting, body electrical, in-line connections, powertrain controlsensors, etc. DO NOT over apply lubricant to the point where it prevents the full engagement of sealed connectors. A light coating on the terminalsurfaces is sufficient to correct the condition.

Supercede:This bulletin is being revised to update the Attention statement and add the 2011 model year. Please discard Corporate Bulletin Number 09-06-03-004C(Section 06 - Engine/Propulsion System).

Condition

Some customers may comment on any of the following conditions:

- An intermittent no crank/no start

- Intermittent malfunction indicator lamp (MIL) illumination

- Intermittent service lamp illumination

- Intermittent service message(s) being displayed

The technician may determine that he is unable to duplicate the intermittent condition.

Cause

- Vibration

- Thermal cycling

- Poor connection/terminal retention

- Micro motion

- A connector, component or wiring harness not properly secured resulting in movement

On low current signal circuits this condition may cause high resistance, resulting in intermittent connections.
On high current power circuits this condition may cause permanent increases in the resistance and may cause a device to become inoperative.

Representative List of Control Modules and Components

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > Customer

Interest for Relay Module: > 09-06-03-004D > Dec > 10 > Electrical - MIL ON/DTC's Set By Various Control Modules > Page 37

Express 1 Ton Van V8-6.5L DSL Turbo VIN F (1998)

This condition may be caused by a buildup of nonconductive insulating oxidized debris known as fretting corrosion, occurring between two electricalcontact surfaces of the connection or connector. This may be caused by any of the following conditions:

The following is only a representative list of control modules and components that may be affected by this connection or connector condition and include every possible module or component for every vehicle. DOESNOT

- Blower Control Module

- Body Control Module (BCM)

- Communication Interface Module (CIM)

- Cooling Fan Control Module

- Electronic Brake Control Module (EBCM)

- Electronic Brake and Traction Control Module (EBTCM)

- Electronic Suspension Control (ESC) Module

- Engine Control Module (ECM)

- Heating, Ventilation and Air Conditioning (HVAC) Control Module

- HVAC Actuator

- Inflatable Restraint Sensing and Diagnostic Module (SDM)

- Any AIR BAG module

- Seatbelt Lap Anchor Pretensioner

- Seatbelt Retractor Pretensioner

- An SIR system connection or connector condition resulting in the following DTCs being set: B0015, B0016, B0019, B0020, B0022, or B0023

- Powertrain Control Module (PCM)

- Remote Control Door Lock Receiver (RCDLR)

- Transmission Control Module (TCM)

Correction

replace the control module, wiring or component for the following conditions: ImportantDO NOT

-

be duplicated. The condition is intermittent and cannot

-

be duplicated. The condition is present and by disconnecting and reconnecting the connector the condition can no longer

Use the following procedure to correct the conditions listed above.

1. Install a scan tool and perform the Diagnostic System Check - Vehicle. Retrieve and record any existing history or current DTCs from all of the
control modules (refer to SI).

If any DTC(s) are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle to identify the connector(s) of the control module/component

which may be causing the condition (refer to SI).

If DTCs are not set, refer to Symptoms - Vehicle to identify the connector(s) of the control module/component which may be causing the

condition (refer to SI).

2. When identified, use the appropriate DTC Diagnostics, Symptoms, Schematics, Component Connector End Views and Component Locator
documents to locate and disconnect the affected harness connector(s) which are causing the condition.

ImportantDO NOT

apply an excessive amount of dielectric lubricant to the connectors as shown, as hydrolock may result when attempting to mate theconnectors. Use ONLY a clean nylon brush that is dedicated to the repair of the conditions in this bulletin.

3. With a one-inch nylon bristle brush, apply dielectric lubricant to both the module/component side and the harness side of the affected connector(s).

4. Reconnect the affected connector(s) and wipe away any excess lubricant that may be present. 5. Attempt to duplicate the condition by using the following information:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > Customer

Interest for Relay Module: > 09-06-03-004D > Dec > 10 > Electrical - MIL ON/DTC's Set By Various Control Modules > Page 38

Express 1 Ton Van V8-6.5L DSL Turbo VIN F (1998)

Note

Fretting corrosion looks like little dark smudges on electrical terminals and appear where the actual electrical contact is being made. In less severecases it may be unable to be seen or identified without the use of a magnifying glass.

- DTC Diagnostic Procedure

- Circuit/System Description

- Conditions for Running the DTC

- Conditions for Setting the DTC

- Diagnostic Aids

- Circuit/System Verification

If the condition cannot be duplicated, the repair is complete. If the condition can be duplicated, then follow the appropriate DTC, Symptom or Circuit/System Testing procedure (refer to SI).

Repair Order Documentation

be documented on the repair order. Failure to do so may result in a chargeback.ImportantThe following information MUST

- Customer vehicle condition.

- Was a Service Lamp or Service Message illuminated? If yes, specify which Service Lamp or Service Message.

- Was a DTC(s) set? If yes, specify which DTC(s) were set.

- After following the procedure contained within this bulletin, could the condition be duplicated?

If the condition duplicated, then document the affected module/component connector name and number on the repair order. was not

-

was

If the condition duplicated after the procedure contained within this bulletin was followed, and additional diagnosis led to the replacement ofa module or component, the SI Document ID Number be written on the repair order. MUST

Parts Information

Alternate Distributor For All of North America
Note

NyoGel(R) 760G Lubricant* is equivalent to GMSPO P/N 12377900, and P/N 10953529 (Canada), specified for use to correct the condition in thisbulletin.

*We believe this source and their products to be reliable. There may be additional manufacturers of such products/materials. General Motors does notendorse, indicate any preference for, or assume any responsibility for the products or material from this firm or for any such items that may be availablefrom other sources.

Warranty Information (excluding Saab Models)

For vehicles repaired under warranty, use the appropriate/closest labor operation depending upon the module/component connection that the dielectriclubricant was applied to:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > Customer

Interest for Relay Module: > 09-06-03-004D > Dec > 10 > Electrical - MIL ON/DTC's Set By Various Control Modules > Page 39

Express 1 Ton Van V8-6.5L DSL Turbo VIN F (1998)

Warranty Information (Saab Models)

For vehicles repaired under warranty, use the appropriate/closest labor operation depending upon the module/component connection that the dielectriclubricant was applied to refer to the table above.

Disclaimer

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Relay Module: > 09-06-03-

004D > Dec > 10 > Electrical - MIL ON/DTC's Set By Various Control Modules

Relay Module: All Technical Service BulletinsElectrical - MIL ON/DTC's Set By Various Control Modules
TECHNICAL

09-06-03-004DBulletin No.:

December 08, 2010Date:

Subject:

Intermittent No Crank/No Start, No Module Communication, MIL, Warning Lights, Vehicle Messages or DTCs Set by Various ControlModules - Diagnosing and Repairing Fretting Corrosion (Disconnect Affected Connector and Apply Dielectric Lubricant)

Models:

2011 and Prior GM Passenger Cars and Trucks

Attention:

This repair can be applied to ANY electrical connection including, but not limited to: lighting, body electrical, in-line connections, powertrain controlsensors, etc. DO NOT over apply lubricant to the point where it prevents the full engagement of sealed connectors. A light coating on the terminalsurfaces is sufficient to correct the condition.

Supercede:This bulletin is being revised to update the Attention statement and add the 2011 model year. Please discard Corporate Bulletin Number 09-06-03-004C(Section 06 - Engine/Propulsion System).

Condition

Some customers may comment on any of the following conditions:

- An intermittent no crank/no start

- Intermittent malfunction indicator lamp (MIL) illumination

- Intermittent service lamp illumination

- Intermittent service message(s) being displayed

The technician may determine that he is unable to duplicate the intermittent condition.

Cause

- Vibration

- Thermal cycling

- Poor connection/terminal retention

- Micro motion

- A connector, component or wiring harness not properly secured resulting in movement

On low current signal circuits this condition may cause high resistance, resulting in intermittent connections.
On high current power circuits this condition may cause permanent increases in the resistance and may cause a device to become inoperative.

Representative List of Control Modules and Components

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > All Technical

Service Bulletins for Relay Module: > 09-06-03-004D > Dec > 10 > Electrical - MIL ON/DTC's Set By Various Control Modules > Page 45

Express 1 Ton Van V8-6.5L DSL Turbo VIN F (1998)

This condition may be caused by a buildup of nonconductive insulating oxidized debris known as fretting corrosion, occurring between two electricalcontact surfaces of the connection or connector. This may be caused by any of the following conditions:

The following is only a representative list of control modules and components that may be affected by this connection or connector condition and include every possible module or component for every vehicle. DOESNOT

- Blower Control Module

- Body Control Module (BCM)

- Communication Interface Module (CIM)

- Cooling Fan Control Module

- Electronic Brake Control Module (EBCM)

- Electronic Brake and Traction Control Module (EBTCM)

- Electronic Suspension Control (ESC) Module

- Engine Control Module (ECM)

- Heating, Ventilation and Air Conditioning (HVAC) Control Module

- HVAC Actuator

- Inflatable Restraint Sensing and Diagnostic Module (SDM)

- Any AIR BAG module

- Seatbelt Lap Anchor Pretensioner

- Seatbelt Retractor Pretensioner

- An SIR system connection or connector condition resulting in the following DTCs being set: B0015, B0016, B0019, B0020, B0022, or B0023

- Powertrain Control Module (PCM)

- Remote Control Door Lock Receiver (RCDLR)

- Transmission Control Module (TCM)

Correction

replace the control module, wiring or component for the following conditions: ImportantDO NOT

-

be duplicated. The condition is intermittent and cannot

-

be duplicated. The condition is present and by disconnecting and reconnecting the connector the condition can no longer

Use the following procedure to correct the conditions listed above.

1. Install a scan tool and perform the Diagnostic System Check - Vehicle. Retrieve and record any existing history or current DTCs from all of the
control modules (refer to SI).

If any DTC(s) are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle to identify the connector(s) of the control module/component

which may be causing the condition (refer to SI).

If DTCs are not set, refer to Symptoms - Vehicle to identify the connector(s) of the control module/component which may be causing the

condition (refer to SI).

2. When identified, use the appropriate DTC Diagnostics, Symptoms, Schematics, Component Connector End Views and Component Locator
documents to locate and disconnect the affected harness connector(s) which are causing the condition.

ImportantDO NOT

apply an excessive amount of dielectric lubricant to the connectors as shown, as hydrolock may result when attempting to mate theconnectors. Use ONLY a clean nylon brush that is dedicated to the repair of the conditions in this bulletin.

3. With a one-inch nylon bristle brush, apply dielectric lubricant to both the module/component side and the harness side of the affected connector(s).

4. Reconnect the affected connector(s) and wipe away any excess lubricant that may be present. 5. Attempt to duplicate the condition by using the following information:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > All Technical

Service Bulletins for Relay Module: > 09-06-03-004D > Dec > 10 > Electrical - MIL ON/DTC's Set By Various Control Modules > Page 46

Express 1 Ton Van V8-6.5L DSL Turbo VIN F (1998)

Note

Fretting corrosion looks like little dark smudges on electrical terminals and appear where the actual electrical contact is being made. In less severecases it may be unable to be seen or identified without the use of a magnifying glass.

- DTC Diagnostic Procedure

- Circuit/System Description

- Conditions for Running the DTC

- Conditions for Setting the DTC

- Diagnostic Aids

- Circuit/System Verification

If the condition cannot be duplicated, the repair is complete. If the condition can be duplicated, then follow the appropriate DTC, Symptom or Circuit/System Testing procedure (refer to SI).

Repair Order Documentation

be documented on the repair order. Failure to do so may result in a chargeback.ImportantThe following information MUST

- Customer vehicle condition.

- Was a Service Lamp or Service Message illuminated? If yes, specify which Service Lamp or Service Message.

- Was a DTC(s) set? If yes, specify which DTC(s) were set.

- After following the procedure contained within this bulletin, could the condition be duplicated?

If the condition duplicated, then document the affected module/component connector name and number on the repair order. was not

-

was

If the condition duplicated after the procedure contained within this bulletin was followed, and additional diagnosis led to the replacement ofa module or component, the SI Document ID Number be written on the repair order. MUST

Parts Information

Alternate Distributor For All of North America
Note

NyoGel(R) 760G Lubricant* is equivalent to GMSPO P/N 12377900, and P/N 10953529 (Canada), specified for use to correct the condition in thisbulletin.

*We believe this source and their products to be reliable. There may be additional manufacturers of such products/materials. General Motors does notendorse, indicate any preference for, or assume any responsibility for the products or material from this firm or for any such items that may be availablefrom other sources.

Warranty Information (excluding Saab Models)

For vehicles repaired under warranty, use the appropriate/closest labor operation depending upon the module/component connection that the dielectriclubricant was applied to:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > All Technical

Service Bulletins for Relay Module: > 09-06-03-004D > Dec > 10 > Electrical - MIL ON/DTC's Set By Various Control Modules > Page 47

Express 1 Ton Van V8-6.5L DSL Turbo VIN F (1998)

Warranty Information (Saab Models)

For vehicles repaired under warranty, use the appropriate/closest labor operation depending upon the module/component connection that the dielectriclubricant was applied to refer to the table above.

Disclaimer

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Door Lock Control Module

Keyless Entry Module: LocationsDoor Lock Control Module

Front Crossbody Wiring

In the left kick panel.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Door Lock Control Module > Page 53

Instrument Panel Wiring

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 54

EVO/Passlock Module Connector

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Locations

Power Door Lock Control Module: Locations

Front Crossbody Wiring

In the left kick panel.

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Locations > Page 58

Power Door Lock Control Module Connector

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay > Component Information > Locations

Power Door Lock Relay: Locations

Front Air Delivery Controls

Behind the ignition panel, in the center of the bulkhead.

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay > Component Information > Locations > Page 62

Power Door Lock Relay Connector

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Specifications

Electronic Brake Control Module: Specifications

EBCM Bracket Mounting Bolts ............................................................................................................................................................... 24 Nm (18 ft. lbs.)EBCM To BPMV ................................................................................................................................................................................... 5 Nm (39 inch lbs.)

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Specifications > Page 67

Electronic Brake Control Module: Locations

Wheel Speed Sensor Wiring

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Specifications > Page 68

Express 1 Ton Van V8-6.5L DSL Turbo VIN F (1998)

Electronic Brake Control Module Wiring

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Specifications > Page 69

Express 1 Ton Van V8-6.5L DSL Turbo VIN F (1998)

Fuel Pump Wiring

On the left frame rail, near the center of the vehicle

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Diagrams > Electronic Diagnostics

Electronic Brake Control Module: DiagramsElectronic Diagnostics

Electronic Brake Control Module, C1 Connector

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Diagrams > Electronic

Diagnostics > Page 72

Express 1 Ton Van V8-6.5L DSL Turbo VIN F (1998)

Electronic Brake Control Module Connector (C2)

Electronic Brake Control Module C3 Connector

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Diagrams > Electronic Diagnostics > Page 73

Electronic Brake Control Module: DiagramsHydraulic Brakes

EBCM, Connector C1

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Diagrams > Electronic

Diagnostics > Page 74

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EBCM, Connector C2

EBCM, Connector C3 (Part 1 Of 2)

EBCM, Connector C3 (Part 2 Of 2)

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Diagrams > Page 75

Electronic Brake Control Module: Service and Repair

REMOVAL PROCEDURE

IMPORTANT: (EBCM)

After installation, calibrate the new Electronic Brake Control Module to the tire size that is appropriate to the vehicle.Refer to Tire Size Calibration portion of ABS System Description.

1. Negative Battery Cable.

2. Raise vehicle and properly support.

(EHCU)

3. Remove the three Electronic Hydraulic Control Unit (1) shield bolts ant shield.4. Disconnect the four electrical connectors from EBCM.

5. Remove the three bolts (1) that fasten the EHCU bracket to the frame.

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6. Remove the EHCU from the frame allowing enough clearance to access the EBCM. Be careful not to bend the brake pipes attached to the EHCU

Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.IMPORTANT:

7. Remove the four T-25 Torx bolts (1) that fasten the EBCM to the BPMV. Remove the EBCM (2) from the BPMV (4). Removal may require a
light amount of force.

8. Clean the BPMV with a clean, dry cloth.

INSTALLATION PROCEDURE

IMPORTANT:

^

If the EBCM mounting bolts are corroded or damaged, do not reuse the old mounting bolts. Install new EBCM mounting bolts with the newEBCM.

^ Do not use RTV or any other type of sealant on the EBCM Gasket or mating surfaces.

1. Install EBCM (2) to BPMV (4).2. Install the four EBCM bolts (1).
^

Tighten the four bolts to in an X-pattern.5 Nm (39 inch lbs.)

Refer to Fastener Notice in Service Precautions.NOTICE:

3. Connect the four electrical connectors to the EBCM.4. Install the EHCU Shield.
^

Tighten the three bolts to .12 Nm (8 ft. lbs.)

5. Lower the vehicle6. Connect the negative battery cable.7. Revise the tire calibration using the Scan Tool.8. Return to Diagnostic System Check. Refer to Diagnostic System Check.

> Relays and Modules > Relays and Modules - Cooling System > Coolant Level Indicator Module > Component Information > Locations

Instrument Panel Wiring, Driver Outer Knee Bolster Bracket

> Relays and Modules > Relays and Modules - Cooling System > Coolant Level Indicator Module > Component Information > Locations > Page 81

Low Engine Coolant Level Indicator Module Connector (Diesel)

> Relays and Modules > Relays and Modules - Cooling System > Coolant Level Indicator Module > Component Information > Locations > Page 82

Coolant Level Indicator Module: Service and Repair

REMOVAL PROCEDURE

1. Remove the instrument panel driver knee bolster panel.2. Remove the engine coolant level indicator module (1) from the brake pedal support.3. Disconnect the electrical connector (2) from the engine coolant level indicator module.

INSTALLATION PROCEDURE

1. Connect the electrical connector (2) to the engine coolant level indicator module.2. Install the engine coolant level indicator module (1) to the brake pedal support.3. Install the instrument panel driver knee bolster panel.

> Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module > Component Information > Locations

Cruise Control Module: Locations

Instrument Panel Wiring, Forward Of Dash

Front of the engine near the left hand fender.

> Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module > Component Information > Diagrams > Diagram Information and Instructions

Cruise Control Module: Diagram Information and Instructions

Abbreviation

Following is a list of abbreviations used in the wiring diagrams. The abbreviations have been developed in such a way that their meaning should be clear.

A

Ampere

A/C

Air Conditioner

AC

Alternating Current

ACC

Accessory

AIR

Air Injection Reaction

AIR/COND

Air Conditioner

AMP

Ampere

ANT

Anticipate

ASM

Assembly

ASSY

Assembly

AUD

Audio

AUTO

Automatic

AUX

Auxiliary

BAT

Battery

BATT

Battery

BI-LEV

Bi-Level

BLK

Black

BLT

Belt

BLU

Blue

BOT

Bottom

BRK

Brake

BRN

Brown

BTSI

Brake/Trans Shift Interlock

BU

Backup

BUZZ

Buzzer

CD

Compact Disc

CID

Cubic Inch Displacement

CIR/BRK

Circuit Breaker

CIRC

Circuit

CLSTR

Cluster

CNTRL

Control

COMP

Compartment

COMP

Compressor

CONN

Connector

CONV

Convenience

CRNK

Crank

CTSY

Courtesy

CYL

Cylinder

DC

Direct Current

DEF

Defrost

DK

Dark

DIAG

Diagnostic

DIM

Dimmer

DIR

Directional

DISC

Discrete

DIV

Diverter

DLC

Data Link Connector

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DM

Dome

DR

Door

DRL

Daytime Running Lamps (Canadian Only)

ECM

Engine Control Module

EGR

Exhaust Gas Recirculation

ELEC

Electric

ENG

Engine

EPR

Exhaust Pressure Regulator

ETR

Electronically Tuned Radio

EXC

Except

F-PUMP

Fuel Pump

FLASH

Flasher

FRT

Front

4WD

Four-Wheel Drive

GAU

Gauges

GEN

Generator

GRA

Gray

GRD

Ground

GRN

Green

HAND

Handling

HAZ

Hazard

HD

Heavy Duty

HDLP

Headlamp

HI

High

HTR

Heater

IAC

Idle Air Control

IGN

Ignition

ILLUM

Illumination

I/P

Instrument Panel

INC

Increased

IND

Indicator

INJ

Injector

INST

Instrument

INSTR

Instrument

INTER

Interior

LD

Light Duty

LH

Left Hand

LO

Low

LP

Lamp

LPS

Lamps

LT

Light

LTR

Lighter

M

Motor

MAN

Manual

MAP

Manifold Absolute Pressure

MAX

Maximum

MED

Medium

MRKR

Marker

MTR

Manually Tuned Radio

MULT

Multiple

NAT

Natural

NEU

Neutral

NO

Normally Open

NC

Normally Closed

ORN

Orange

PCM

Powertrain Control Module

PK

Park

PLR

Puller

PNK

Pink

PNL

Panel

PPL

Purple

PRESS

Pressure

PVAC

Partial Vacuum

PWR

Power

RCVR

Receiver

> Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module > Component Information > Diagrams > Diagram Information and Instructions > Page

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REF

Reference

RESIST

Resistance

RH

Right Hand

RKE

Remote Keyless Entry

RPO

Regular Production Option

RST

Rust

RWAL

Rear Wheel Antilock

SEN

Sensor

SEND

Sender

SIG

Signal

SIL

Silver

SIR

Supplemental Inflatable Restraint

SKT

Socket

SOL

Solenoid

SPEEDO

Speedometer

STR

Stripe

STRG

Steering

SW

Switch

TACH

Tachometer

TBI

Throttle Body Fuel Injection

TCC

Torque Converter Clutch

TCM

Transmission Control Module

TEMP

Temperature

T/L

Taillamp

TP

Throttle Position

TRANS

Transmission

TYP

Typical

V

Volt

VAC

Vacuum

VCM

Vehicle Control Module

VEN

Vent

VLV

Valve

VSS

Vehicle Speed Sensor

W/

With

W/O

Without

W/S

Windshield

W/WASHER

Window Washer

WDO

Window

WHT

White

WGR

Wiring

YEL

Yellow

Cell References
CELL REFERENCES

"CELL"

General Motors vehicles often use references in their electrical wiring diagrams. These references are used in the Original EquipmentManual to refer to a section in the manual and not a specific diagram(s).

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GM Sample Diagram W/ Cell Reference

For instance, in the diagram illustrated "Cell 20" is not a reference to another diagram but a reference to "Section 20" in the OE manual. In theexample, "Section 20" is the engine control section of the manual.

Diagrams / Electrical Diagrams

To navigate through these "Cell" references start at the vehicle level and go to: - for a complete list of the diagramsavailable for the vehicle. Choose the you are working on and view those diagrams. system

Note:

If unsure of the system - try utilizing the search feature. Type a component in the search feature that belongs to the system and when theresults are displayed note the path displayed. This will show the system the component belongs in.

Electrostatic Discharge (ESD Sensitive Devices)

Electrostatic Discharge (ESD) Sensitive Device Symbol

Component (On Schematic) Indicated As ESD Sensitive

(ESD)

All Electrostatic Discharge sensitive components contain Solid State circuits. The following information applies to all ESD sensitive devices. TheESD symbol is used on schematics to indicate which components are ESD sensitive.

Handling Procedures

When handling an electronic part that is ESD sensitive, the service technician should follow these guidelines to reduce any possible electrostaticcharge build-up on the service technician's body and the electronic part in the dealership:1. Always touch a known good ground before handling the part. This should be repeated while handling the part and more frequently after sliding

across the seat, sitting down from a standing position or walking a distance.

2. Avoid touching electrical terminals of the pan, unless so instructed by a written diagnostic procedure.3. Do not open package of new part until it is time to install the part.4. Before removing the part from its package, ground the package to a known good ground on the vehicle.

Measuring Procedures

1. Solid State circuits in electronic devices are shown greatly simplified.2. Due to the simplification of the electronic devices on the schematics, resistance measurements could be misleading or could lead to

electrostatic discharge.

3. Only measure the resistance at the terminals of these devices when instructed by a written diagnostic procedure.4. When using a voltmeter, be sure to connect the ground lead first.

> Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module > Component Information > Diagrams > Diagram Information and Instructions > Page

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On Board Diagnostics II (OBDII) Symbol

On Board Diagnostics II (OBDII) Symbol

The OBDII symbol is used on circuit diagrams to alert the technician that the circuit is essential for proper OBDII emission control circuit operation.Any circuit which, if it fails, causes the SERVICE ENGINE SOON indicator to turn on, is identified as an OBDII circuit.

Schematic Symbols

> Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module > Component Information > Diagrams > Diagram Information and Instructions > Page

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Symbols (Part 1 Of 3)

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