Important: The left and right front upper rails are serviced as assemblies. The upper rails should be replaced at factory seams.
• | Sealers |
• | Sound deadeners |
• | Anti-corrosion materials |
Caution: Foam sound deadeners must be removed from areas within 152.4 mm (6 in) of where flame is to be used for body repairs. When reinstalling foam sound deadeners, avoid inhaling fumes as bodily injury may result.
Important: There are a number of welds attaching the rear of the upper rail to the cowl panel. These welds can be accessed through the openings on the outboard side of the upper rail (1). Do not drill through the cowl panel when removing these welds.
When repairing an existing upper rail the hood hinge mounting locations must be inspected for stress or metal fatigue (2). Torque the hood hinge mounting bolts to 12 N·m (106 lbs in). The upper rail must be replaced if any damage to the hood hinge mounting locations is evident.Important: Prior to refinishing, refer to GM 4901MD-99 Refinish Manual for recommended products. Do not combine paint systems. Refer to paint manufacturer's recommendations.