GENERAL MOTORS, GM and the GM Emblem,
CHEVROLET, the CHEVROLET Emblem, GMC, the
GMC Emblem, and the names SILVERADO and SIERRA
are registered trademarks of General Motors Corporation.
The information in this manual supplements the owner
manual. This manual includes the latest information
at the time it was printed. GM reserves the right to make
changes after that time without further notice.
Keep this manual in the vehicle for quick reference.
Propriétaires Canadiens
On peut obtenir un exemplaire de ce guide en français
auprès de concessionnaire ou à l’adresse suivante:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
1-800-551-4123
www.helminc.com
Canadian Owners
A French language copy of this manual can be obtained
from your dealer/retailer or from:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
1-800-551-4123
www.helminc.com
Litho in U.S.A.
Part No. 25785840 A First Printing
ii
Introduction
Your hybrid pickup is designed to be more fuel efficient
than the standard pickup, which results in reduced
carbon dioxide emissions.
2008 General Motors Corporation. All Rights Reserved.
Using this Supplement
Index
This supplement contains information specific to the
hybrid components of the vehicle. It does not explain
everything you need to know about the vehicle.
Read this supplement along with the owner manual to
learn about the vehicle’s features and controls.
A good place to look for what you need is the Index in
back of this supplement. It is an alphabetical list of what is
in the supplement, and the page number where you will
find it.
(All Split Bench and Hybrid Full Bench) ..........1-2
Restraint System Check ...................................1-3
Replacing Restraint System Parts
After a Crash .............................................1-3
1-1
Rear Seats
Rear Seat Operation (All Split
Bench and Hybrid Full Bench)
Folding Rear Seat
On a vehicle with a second row 60/40 split seat either
side of the rear seat may be folded for added cargo
space.
Notice: Folding a rear seat with the safety belts
still fastened may cause damage to the seat or the
safety belts. Always unbuckle the safety belts
and return them to their normal stowed position
before folding a rear seat.
Make sure that nothing is on the seat.
To fold the seat, slowly pull the seat cushion up.
To return the seat to the normal seating position, slowly
pull the seat cushion down.
{ CAUTION:
A safety belt that is improperly routed, not properly
attached, or twisted will not provide the protection
needed in a crash. The person wearing the belt
could be seriously injured. After raising the rear
seatback, always check to be sure that the safety
belts are properly routed and attached, and are
not twisted.
1-2
Restraint System Check
Replacing Restraint System Parts
After a Crash
If an airbag inflates or the vehicle has been in a crash,
the vehicle’s sensing system may command the
automatic hybrid battery disconnect to open. The battery
will disconnect. The hybrid battery will be off and the
vehicle will not start. The airbag readiness light and/or
SERVICE HYBRID SYSTEM message may come on in
the driver information center. See “Airbag Readiness
Light” in the owner manual and Driver Information Center(DIC) on page 3-12 for more information.
To operate the vehicle, the automatic hybrid battery
disconnect must be serviced by a qualified service
technician and sensing system parts will need to be
replaced. Have the vehicle serviced right away.
1-3
✍ NOTES
1-4
Section 2Features and Controls
Storage Areas ..................................................2-2
Running the Vehicle While Parked ..................2-18
2-1
Storage Areas
Tonneau Cover (Hard Tonneau)
Installing the Cover
{ CAUTION:
An improperly stored cargo cover could be thrown
about the vehicle during a collision or sudden
maneuver. Someone could be injured. If the cover
is removed, always store it in the proper storage
location. After positioning the cargo cover back on
the vehicle, always be sure that it is securely
reattached by properly securing the straps and
latches.
1. Position the tonneau cover onto the top of the
pickup box with the locator tabs positioned into
the front stake pockets.
2. Align the front edge of the cover with the front edge
of the bed rail so that it is centered on each side of
the truck bed.
3. Lower the front clamp from its storage position.
2-2
4. Tilt the clamp assembly so that the locator is in the
slot, pull down on the assembly, and slide the clamp
under the edge of the inner lip of the bed rail.
5. Pull the handle toward the rear of the truck to engage
the clamp. Make sure the locator is secure into the
slot (A). If unable to completely engage clamp, see
the tightening and loosening procedures later in this
section.
6. The clamp should be securely engaged. Shake
the handle assembly to make sure the handle
does not move.
7. There are locking features on the front clamps only.
With the handle in the clamped position, push the
locking tab to engage the lock.
8. Repeat the clamp attachment steps 3 through 7 for
the opposite side.
2-3
Closing the Cover
1. Release both the retention straps located on the
top of the cover behind the cab and press into the
stored position.
2. Unfold the tonneau cover to the closed position.
3. Lower the rear set of clamp assemblies from
the stored position.
4. Tilt the clamp assembly so that the locator is in the
slot, pull down on the assembly, and slide the clamp
under the edge of the inner lip on the bed rail.
5. Pull the handle toward the rear of the truck to
engage the clamp. Make sure the locator is secured
into the slot (A). If unable to completely engage
clamp, see the tightening and loosening procedures
later in this section.
6. The clamp should be securely engaged. Shake
the handle assembly to make sure the handle
does not move.
7. Repeat the clamp attachment steps 3 through 6 for
the opposite side.
8. Close the endgate.
2-4
Opening the Tonneau Cover
1. Turn both of the rear handles inward to release
compression.
2. Pull the clamp down and turn the assemblies to
disengage them from the lip of the pickup box.
3. Open the cover to expose the handles.
4. Align the clamp assembly bolt (A) with the retention
feature (B).
5. Turn the handle assembly and clamp assembly bolt
sideways (A) into the slot of the retention feature (B).
6. The handle should lie flat on the panel with the
handles facing inward. Press firmly to secure.
This step must be done before stowing the cover.
7. Fold the cover forward.
8. Remove the retaining strap from the bow. Connect
the retention buckle ends. One end is located on
the front of the tonneau cover behind the cab
and the other end is on the tonneau cover
9. Pull on each strap to make sure both buckles are
attached.
2-5
Removing the Tonneau Cover
1. Open the cover by following the procedure described
previously, under “Opening the Tonneau Cover”.
2. Disengage the locking tabs, located on the front
handles, by pulling them rearward.
3. Turn the handles inward to release.
4. Pull the clamp down and turn the assembly to
disengage it from the lip of the truck box.
5. Turn the cover to expose the handles.
6. Align the clamp assembly bolt (A), with the retention
feature (B).
7. Turn the handle assembly sideways by tilting the
assembly bolt (A) into the slot of the retention
feature (B).
8. The handle should lie flat on the panel with the
handles facing inward. Press firmly to secure.
9. Remove the tonneau cover from the vehicle.
2-6
Tightening the Clamp
1. Push the handle forward to release it from the
clamped position.
2. Disengage the clamp from the inner edge of the
bed rail and slide the assembly inward.
3. Adjust the clamp height on the bolt by turning the
entire clamp assembly counter-clockwise.
4. Attach the clamps as indicated in steps 4 and 5 of
Installing the Cover.
Loosening the Clamp
1. Return the handle to the fully disengaged position.
2. Disengage the clamp from the inner edge of the
bed rail and slide the assembly inward.
3. Adjust the clamp height by turning the entire clamp
assembly clockwise.
4. Reattach the clamps as indicated in steps 4 and 5
of Installing the Cover.
Tonneau Cover (Soft Tonneau)
Side Rail
{ CAUTION:
An improperly stored cargo cover could be thrown
about the vehicle during a collision or sudden
maneuver. Someone could be injured. If the cover
is removed, always store it in the proper storage
location. After positioning the cargo cover back on
the vehicle, always be sure that it is securely
reattached by properly securing the straps and
latches.
Installation
1. The adjuster screw end
of each side rail should
point in the direction
of the cab.
2. Align the front edge of the side rail with the front
inside edge of pickup box.
2-7
Clamp
Installation
1. Position three outer clamps (A), on each side rail.
The positions on the siderails are marked CLAMP.
2. Position the grooves of
the clamps on the side
rails (A) using the
center groove (B).
3. If the pickup box
has molded bed rail
protectors (A), remove
the insert (C) from
the outer groove on the
clamp, and position
the clamp on the side
rail (B) using the
outer groove (D).
2-8
4. Slide the inner
clamp (B) into the outer
clamp (A).
5. Turn the latch (C) onto
the outer clamp.
6. Tighten the clamp by turning the latch (C) toward
the side rail.
7. If the truck box has a molded bed rail protector,
insert the latch into the top notch on the inner
clamp.
Adjustment
If there is excessive sideways movement of the
crossrails, move and re-install the clamps on the loose
areas using the inner groove of the clamp.
Cover
Installation
1. Place the cover assembly into the front pivot
mounts to lock the latches into place on both ends
of the front rail.
2. Firmly press down on each side of the cover, until
the latches are secured into the side rails.
2-9
3. Release both straps on the cover. Roll the cover
out. Each bow should fall between the side rails.
2-10
4. When the cover is rolled out, place the rear rail into
the rear pivot mounts. Press firmly down on the
driver side until the latch is secured into the
side rails. Only the driver side has a latch.
5. Secure the driver side of the cover to the side rail.
Then pull the cover tight across the bed and fasten
the passenger side.
Removal
6. Secure the buckles by
folding them once, then
slide them under the
cord located on
the cover.
1. To remove the cover,
open the tailgate and
pull the rear cord to the
right.
®
5. On the passenger side, release the Velcro
the side rail.
6. Then pull the front cord to the right. This releases
the cover assembly from the side rail.
7. Pick the cover assembly up on the driver side and
pull the whole assembly off the truck box.
from
Adjustment
1. If the cover is tight, turn
the tensioning screw
counter clockwise to
loosen the tension of
the vinyl. This makes it
easier to operate the
rear release latch. The
tensioning screws are
located on each side
rail. Use the provided
1/4 inch key to turn the
tensioning screws.
2. From the driver side, roll the cover up tightly.
3. After the cover is rolled up, secure both tie-down
straps by pulling them tightly.
4. Secure the cover into the open position.
2. Adjust the screws on both sides to the same
tension.
2-11
Starting and Operating Your
Vehicle
Starting the Vehicle
{ CAUTION:
Exiting the vehicle, without first shifting into
P (Park), may cause the vehicle to move, and you
or others can be seriously injured. Because the
vehicle has the Automatic Engine Start/Stop
feature, the vehicle’s engine might seem to be shut
off when you come to a complete stop. However,
once the brake pedal is released, the vehicle can
move. The vehicle’s engine can also restart at
any time.
Shift to P (Park) and turn the ignition to LOCK/OFF,
before exiting the vehicle.
Start the engine as you would any other engine. See
“Starting the Engine” in the owner manual for more
information on starting. The hybrid system provides very
quiet engine starting. If pulling a trailer with trailer brakes,
see Towing a Trailer on page 4-2 for more information.
Auto Stop
The vehicle has an Auto Stop feature. After a successful
engine start, the engine may turn off and operate in
the Auto Stop mode. Some of the vehicle conditions that
allow the engine to stop running and enter the Auto
Stop mode are:
• Ignition switch is in the ON/RUN position.
• The hood is closed.
• The gear selector is in P (Park), N (Neutral) or
D (Drive).
• The hybrid battery is at an acceptable state of
charge.
• The hybrid battery voltage, temperature or power
limits are not exceeded. In very hot conditions,
Auto Stop may be unavailable until the hybrid
battery has cooled.
• The engine is at operating temperature.
If you are on an incline, the hybrid drive motor can help
keep the vehicle from rolling backwards, even if the
engine is in Auto Stop.
With your foot off the brake and the vehicle on level
ground, the hybrid drive motor may cause the vehicle to
roll slowly forward, even when the engine is in Auto Stop.
Keep your foot firmly on the brake pedal until you are
ready for the vehicle to move.
2-12
Engine OFF and AUTO STOP modes are indicated on
the tachometer display. When the tachometer needle
indicates OFF, the engine is not running and will remain
off until the ignition key is placed in the START position or
a remote vehicle start is performed. When the tachometer
needle indicates AUTO STOP, the hybrid system is on,
the engine is not running, but may Auto Start at any time
without notice. See Tachometer on page 3-4 for more
information.
A chime will sound if the driver door is opened while in
Auto Stop as a reminder that the ignition switch is
not in the LOCK/OFF position. Always turn the ignition
switch to LOCK/OFF and remove the key from the
ignition switch when exiting the vehicle.
Auto Start
The vehicle also has an Auto Start feature. The engine
will remain off while in Auto Stop mode until vehicle
conditions require the engine to run. The near-instant
starting of the engine from Auto Stop mode is called
Auto Start. Some of the vehicle conditions that
may cause the engine to Auto Start are:
• The hood is opened.
• The gear selector is in M (Manual Mode) or
R (Reverse).
• The hybrid battery state of charge is too low.
• The hybrid battery voltage, temperature or power
limits are exceeded.
• The engine is not at operating temperature.
• Acceleration demands require the use of the engine.
EV Mode
The vehicle also has an EV mode which uses only
the electric motor to move the vehicle. With light
acceleration, the vehicle will drive in EV mode. EV mode
is unavailable when the vehicle is out of fuel.
If increased acceleration is required, or the vehicle
reaches approximately 30 mph (40 km/h), the engine
will start automatically. The engine shuts off at speeds
below 25 mph (40 km/h) unless the transmission is
in M (Manual Mode) or Auto Stop is disabled.
During heavy acceleration, both the engine and hybrid
electric motors supply power. A sensation similar to a
transmission gear change can be felt as the transmission
changes modes. Engine RPM may remain above
4,000 RPM for a longer period during hard acceleration.
2-13
Automatic Transmission Operation
The vehicle has an electronic shift position indicator
within the instrument panel cluster.
There are several different positions for the shift lever.
See “Range Selection Mode” later in this section.
P (Park): This position locks the rear wheels. It is the
best position to use when you start the engine because
the vehicle cannot move easily.
When parked on a hill, especially when the vehicle has a
heavy load, you may notice an increase in the effort to
shift out of P (Park). See “Shifting Into P (Park)” in the
Index of vehicle’s owner manual for more information.
{ CAUTION:
It is dangerous to get out of the vehicle if the shift
lever is not fully in P (Park) with the parking brake
firmly set. The vehicle can roll.
Do not leave the vehicle when the engine is
running unless you have to. If you have left the
engine running, the vehicle can move suddenly.
You or others could be injured. To be sure the
vehicle will not move, even when you are on fairly
level ground, always set the parking brake and
move the shift lever to P (Park). See Shifting Into
Park in the Owner Manual. If you are pulling a
trailer, see Towing a Trailer on page 4-2.
2-14
{ CAUTION:
{ CAUTION:
If you have Four-Wheel Drive, the vehicle
will be free to roll — even if the shift lever is in
P (Park) — if the transfer case is in Neutral. So, be
sure the transfer case is in a drive gear, Two-Wheel
Drive High or Four-Wheel Drive High or Four-Wheel
Drive Low — not in Neutral. See “Shifting Into Park”
in the Owner Manual.
R (Reverse): Use this gear to back up.
Notice: Shifting to R (Reverse) while the vehicle is
moving forward could damage the transmission.
The repairs would not be covered by the vehicle
warranty. Shift to R (Reverse) only after the vehicle
is stopped.
To rock the vehicle back and forth to get out of snow, ice,
or sand without damaging the transmission, see “If Your
Vehicle is Stuck in Sand, Mud, Ice, or Snow” in the Index
of the vehicle’s owner manual.
N (Neutral): In this position, the engine and
transmission are not connected with the wheels.
To restart the engine when the vehicle is already
moving, use N (Neutral) only.
Shifting into a drive gear while the engine is
running at high speed is dangerous. Unless your
foot is firmly on the brake pedal, the vehicle could
move very rapidly. You could lose control and hit
people or objects. Do not shift into a drive gear
while the engine is running at high speed.
Notice: Shifting out of P (Park) or N (Neutral) with
the engine running at high speed may damage
the transmission. The repairs would not be covered
by the vehicle warranty. Be sure the engine is
not running at high speed when shifting the vehicle.
D (Drive): This position is for normal driving. It
provides the best fuel economy. If you need more
power for passing, and you are:
• Going less than about 35 mph (55 km/h), push the
accelerator pedal about halfway down.
• Going about 35 mph (55 km/h) or more, push the
accelerator all the way down.
2-15
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