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INSTALLATION INSTRUCTIONS
4" OVAL SIDE BARS WITH BENT ENDS
02-12 SILVERADO/SIERRA CREW CAB
Part # DZ 371537 /DZ 371539
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4" OVAL SIDE BARS WITH BENT ENDS
02-11 SILVERADO/SIERRA CREW CAB
Page 1 of 4 1/12/09 Rev 1(DP)
LERT: GM uses a very strong thread-locking compound on all body bolts. Use of
an air assisted impact ratchet can cause damage to the threads on factory body
mount bolts and the internal nut assembly because of this thread locking
compound.
We only recommend the use of hand tools to slowly remove and reinstall body
mount bolts on all GM vehicles.
PROCEDURE:
CRITICAL INFORMATION: If during the removal process, it becomes increasingly
difficult to unscrew the body mount bolt with hand tools, tighten the bolt several
rotations to clear the thread locking compound from the threads, then reverse
direction and continue to unscrew until the body mount bolt is out. Repeat this
process as necessary on all GM body mount bolts. Use of an appropriate antiseize compound is highly recommended for re-installation. Tighten body mount
bolt to factory torque specifications for your particular model year.
Example of GM factory body mount bolt
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4" OVAL SIDE BARS WITH BENT ENDS
02-11 SILVERADO/SIERRA CREW CAB
Page 2 of 4 1/12/09 Rev 1(DP)
PARTS LIST:
1
Driver/Left Sidebar
4
1/2” Lock Washers
1
Passenger/Right Sidebar
4
1/2” ID x 1-1/2" OD x 1/8" Flat Washers
1
Driver Side/Left Front Mounting Bracket
6
12-1.75mm x 120mm Hex Bolts
1
Passenger Side/Right Front Mounting Bracket
6
12mm x 24mm OD x 2.5mm Flat Washers
2
Center Mounting Brackets
6
12mm Lock Washers
1
Driver Side/Left Rear Mounting Bracket
2
10-1.50mm x 25mm Hex Bolts
1
Passenger Side/Right Rear Mounting Bracket
2
10mm Lock Washers
2
Spacer Plates
2
10mm ID x 20mm OD x 2mm Flat Washers
4
1/2” x 2” Hex Bolts
PROCEDURE:
REMOVE CONTENTS FROM BOX. VERIFY ALL PARTS ARE PRESENT. READ "FACTORY BODY
BOLT REMOVAL INSTRUCTIONS" AND INSTALLATION INSTRUCTIONS CAREFULLY BEFORE
STARTING INSTALLATION. ASSISTANCE IS RECOMMENDED.
1. Start installation on the front, driver side of the vehicle. Remove the driver side front body mount bolt,
(Figure 1).
2. Select the driver side front Mounting Bracket. Insert the factory body mount bolt through the Mounting
Bracket and into the steel washer, (if equipped), and rubber bushing. Hang the Mounting Bracket in
position by partially threading the factory body mount bolt up into place, (Figure 2). Snug but do not
tighten hardware at this time.
a. NOTE: Up to 2003 vehicles. Use the supplied 12mm x 120mm Hex Bolts, 12mm Flat Washers
and 12mm Lock Washers to replace the factory body mount bolts if the washer is not removable
from the factory bolt or if the factory bolt is too short for proper installation.
3. Repeat Step 2 for Center Mounting Bracket installation, (Figure 3).
4. Move toward the rear of the vehicle. Remove the factory body mount bolt as described in Step 1.
Select the driver side Rear Mounting Bracket. Bolt the rear Mounting Bracket in place as described in
Step 2. NOTE: On some 2007 and newer vehicles, the factory body mount washer over the rubber
Driver/Left
rear Mounting
Bracket
Driver/Left front
Mounting Bracket
(2) Center Mounting
Brackets
Passenger/Right front
Mounting Bracket
Passenger/Right
rear Mounting
Bracket
(2) Spacer Plates
Driver Sidebar illustrated. Dashed lines represent locations of threaded inserts to identify Sidebars
46-1/2"
46-1/8"
Front
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4" OVAL SIDE BARS WITH BENT ENDS
02-11 SILVERADO/SIERRA CREW CAB
Page 3 of 4 1/12/09 Rev 1(DP)
bushing is stepped and the Rear Bracket will not sit flat against the washer, (Figure 4A). Use the
supplied Spacer Plates, (Figure 4B), to fill the gap between the Mounting Bracket and the factory steel
washer. Install the Spacer Plate between the steel body mount washer and the Bracket, (Figures 4A,
4B & 5).
VERY IMPORTANT! There are several different designs, (depending on model and year), for
the factory steel body mount bracket welded onto the side of the frame channel, (Figures 1 &
4 A) . If necessary, the Front and Rear Mounting Brackets can be switched, driver side to
passenger side, to provide additional clearance between the gussets on the Mounting Brackets
and the factory steel body mount bracket. To prevent unnecessary noise, adjust the position
of all Mounting Brackets so that once tightened, the Mounting Brackets cannot come in
contact with the factory steel body mount bracket.
5. With assistance, position the Sidebar up to the (3) loose Mounting Brackets. Attach the Sidebar to the
front and rear Mounting Brackets with the included (2) 1/2” x 2” Hex Bolts, (2) 1/2” Flat Washers and (2)
1/2” Lock Washers, (Figures 2 & 5). Do not tighten hardware at this time.
6. Attach the center Mounting Bracket to the Sidebar with the included (1) 10-1.50mm x 25mm Hex Bolt,
(1) 10mm Flat Washer and (1) 10mm Lock Washer, (Figure 3). Do not tighten hardware at this time.
7. Level and adjust the Sidebar, tighten all hardware and check all mounting locations for clearance
between factory steel body mount brackets and Mounting Brackets. Once satisfied with fit, tighten all
hardware.
8. Repeat Steps 1 - 7 for passenger Sidebar installation.
9. Do periodic inspections to the installation to make sure that all hardware is secure and tight.
To protect your investment, wax this product after installing. Regular waxing is recommended to add a
protective layer over the finish. Do not use any type of polish or wax that may contain abrasives that could
damage the finish.
For stainless steel: Aluminum polish may be used to polish small scratches and scuffs on the finish. Mild
soap may be used also to clean the Sidebar.
For gloss black finishes: Mild soap may be used to clean the Sidebar.
Driver side installation pictured
(Fig 1) Front Mounting Location
Factory hex bolt or use
the supplied:
12mm x 120mm Hex Bolt
12mm Lock Washer
12mm Flat Washer
Front
Fig 2
Factory welded steel body mount bracket
1/2” x 2” Hex Bolt
1/2” Lock Washer
1/2” Flat Washer
Front
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4" OVAL SIDE BARS WITH BENT ENDS
02-11 SILVERADO/SIERRA CREW CAB
Page 4 of 4 1/12/09 Rev 1(DP)
Driver side installation pictured
1/2” x 2” Hex Bolt
1/2” Lock Washer
1/2” Flat Washer
(Fig 5) Rear Mounting Location
Rear
10mm x 25mm Hex Bolt
10mm Lock Washer
10mm Flat Washer
(Fig 3) Center Mounting Location
Front
Factory hex bolt or use
the supplied:
12mm x 120mm Hex Bolt
12mm Lock Washer
12mm Flat Washer
Fig 4A
(Fig 4B) Spacer Plate
Rear
Complete Installation
Factory hex bolt or use
the supplied:
12mm x 120mm Hex Bolt
12mm Lock Washer
12mm Flat Washer
Stepped factory steel
washer over rubber bushing
Install Spacer Plate between factory stepped
steel washer and rear Mounting Bracket
only. Spacer Plates are not required on
vehicles equipped with flat steel washer
covering the factory rubber bushing
Spacer Plate if required
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