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
- Record the 10-digit STID number from the label on the new module.
- Install the VIU to the bracket.
- Connect the electrical connectors.
- Refer to Fastener Notice
.
Install the 2 screws (1) securing the VIU to the bracket.
Tighten
Tighten the screws to 9 N.m (80 lb in).
- Install the I/P trim panel. Refer to Instrument Panel Upper Trim Pad Replacement .
- Reconfigure the OnStar® system. Refer to OnStar Reconfiguration (Without TIS 2 Web Gen.3 and prior) .
After replacing the VIU, you must reconfigure the OnStar® system. Failure to reconfigure the system will result in an additional customer visit for repair.
NO RELATED
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.