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.
Circuit/System Verification
The following verification requires the vehicle to be outside with an unobstructed view of the southern sky. Allow 5 minutes after turning the ignition ON for the GPS satellites to acquire vehicle signal.
- Ignition ON.
- Verify that DTC B2470 is not set.
- If DTC B2470 is set
- If DTC B2470 is not set
- Verify that a call can be successfully placed to the OnStar Call Center by pressing the blue OnStar button.
- If unable to connect with the OnStar Call Center.
Refer to Unable to Contact OnStar Call Center
- If able to connect with the OnStar Call Center
- If unable to connect with the OnStar Call Center.
- All OK.
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.