Sierra 1500 4WD V8-4.8L VIN V (2004)
G.
Apply an approved anti-corrosion material to all of the bare metal surfaces.
2.
After completion of any repairs due to the use of aftermarket accessories, install new pickup box reinforcements using the following procedure and
the applicable part numbers listed below.
Pickup Box Reinforcement Installation
Important:
The reinforcements must be installed before adding a toolbox or ladder rack system. After the reinforcements have been installed, follow the
instructions supplied with the toolbox/ladder rack system for installation onto the pickup box.
Use the following service procedure to install the reinforcements. Use the applicable reinforcement kit part number listed below.
Cross Toolbox and Rear Window Barrier Applications - Front Reinforcement Installation
Important:
The horizontal surfaces of the reinforcements must be flush to the horizontal surface of the pickup box top rail. Use a clamping tool when
positioning the reinforcements onto the top rail to ensure flushness to the outer panel.
1.
Place the front L-shaped reinforcements into position on the front top of the pickup box. For vehicles equipped with an over the rail bedliner, the
bedliner should be removed with the aid of an assistant prior to installing these reinforcements.
2.
Mark the holes necessary for drilling.
3.
Remove the front reinforcements.
Important:
Use a block of wood and/or a drill stop in order to protect the back of the cab while drilling.
4.
Drill two 13.5 mm (0.54 in) holes per side into the box section of the front panel.
5.
Drill 7.5 mm (0.30 in) holes into the weld flange of the side outer panel.
6.
Apply anti-corrosion material to the drilled holes as necessary per the GM4901M-D-2005 (English) or GM4901M-D-F 2005 (French) GM
Approved Refinish Materials booklet. The information for the 2005 GM Approved Refinish Materials booklet will now be online at the
GMGOODWRENCH WEB SITE ONLY. Printed books have been discontinued. Steps to the site are as follows:
A.
Go to www.gmgoodwrench.com.
B.
Click on GM Collision Parts.
C.
Click on GM Technical Repair Information.
D.
Click on Paint Shop.
7.
Place the front reinforcements back onto the box, lining up the drilled holes.
