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.
2008 Hummer H3 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Installation Procedure
WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
- Install the communication interface module.
- Tighten the communication interface module bolts.
Tighten: Tighten the bolts to 10 N.m (89 lb in).
- Connect the communication interface module wire harness and antenna connectors.
- Install the right closeout panel. Refer to Instrument Panel Insulator Panel Replacement - Right Side .
- Reconfigure the OnStar system. Refer to Control Module References .
NOTE:
Refer to Fastener Notice
.
IMPORTANT:
After replacing the communication interface module, you must reconfigure the OnStar system. Failure to reconfigure the system will result in an additional customer visit or repair. In addition, pressing and holding the white dot button on the keypad will NOT reset the OnStar system. This action will cause a DTC to set.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.