Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Installation Procedure
2008 Pontiac Grand Prix BaseSECTION Installation Procedure
WARNING: This page is about a different car, the 2008 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
- Install the crossmember to the vehicle.
- Perform the following procedure before installing the bolts.
- Remove all traces of the original adhesive patch.
- Clean the threads of the bolt with denatured alcohol or equivalent and allow to dry.
- Apply Threadlocker GM P/N 12345493 (Canadian P/N 10953488).
- Install the bolts and the nuts.
Tighten: Tighten the nuts to 90 N.m (66 lb ft).
- Remove the differential support.
- Install the differential mounting nut, bolt, and washer. Refer to Differential Carrier Assembly Replacement .
- Install the underbody shields. Refer to Catalytic Converter Guard Replacement .
- Lower the vehicle.
NOTE:
Refer to Fastener Notice
.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.