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.
OnStar Description and Operation: Notes
This vehicle will be equipped with either the 2.0 or 2.6 version of the OnStar® system. Both systems consist of a vehicle interface unit (VIU), vehicle communication unit (VCU), GPS antenna, cellular antenna, microphone and OnStar® button assembly. Both the systems interface with the vehicle audio system.
The OnStar® system version 2.0 provides the customer with impact detection, navigation instructions, emergency services, stolen vehicle tracking and recovery service, roadside assistance, door unlock, light flash and horn pulse.
The OnStar® system version 2.6 provides all the same features as version 2.0 with the addition of a hands free cellular phone. The OnStar® Personal Calling feature, if equipped, uses voice commands for dialing and programming.
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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.