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
- Install the BCM to the vehicle and install the retaining nuts.
Tighten:Â Tighten the nuts to 10 N.m (88 lb in).
- Connect the large I/P wiring harness connector (2) to the BCM.
- Connect the small I/P wiring harness connector (1) to the BCM.
- Connect the large body wiring harness connector (2) to the BCM.
- Connect the small body wiring harness connector (1) to the BCM.
- Connect the OnStar® connector.
- Pull back the carpet and position the center support bracket into position.
- Install the center support bracket nuts.
Tighten:Â Tighten the nuts to 10 N.m (88 lb in).
- Install the wiring harness rosebud to the center support bracket.
- Install the front floor console. Refer to Console Replacement - Front Floor in Instrument Panel, Gages, and Console.
- Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
- Program a new or a remanufactured BCM. Refer to Control Module References .
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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