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 vehicle to acquire the GPS satellites signal.
- Ignition ON.
- Verify that DTC B2462 is not set in the Telematics Communication Interface Control Module.
- If DTC B2462 is set in the Telematics Communication Interface Control Module and the vehicle is not equipped with a navigation system
Refer to Circuit/System Testing Without Navigation System.
- If DTC B2462 is set in the Telematics Communication Interface Control Module and the vehicle is equipped with a navigation system
Refer to Circuit/System Testing With Navigation System.
- Go to next step: If DTC B2462 is not set in the Telematics Communication Interface Control Module
- If DTC B2462 is set in the Telematics Communication Interface Control Module and the vehicle is not equipped with a navigation system
- Verify an OnStar advisor can locate the vehicle after performing a blue button press.
- If the advisor can not locate the vehicle and the vehicle is not equipped with a navigation system
Refer to Circuit/System Testing Without Navigation System
- If the advisor can not locate the vehicle and the vehicle is equipped with a navigation system
Refer to Circuit/System Testing With Navigation System.
- Go to next step: If the advisor can locate the vehicle
- If the advisor can not locate the vehicle and the vehicle is not equipped with a navigation system
- Verify DTC B2462 is not set in the radio.
- If DTC B2462 is set in the radio
Refer to Circuit/System Testing With Navigation System - Step 9.
- Go to next step: If DTC B2462 is not set in the radio
- If DTC B2462 is set in the radio
- Verify that the NO GPS symbol/message is not displayed on the radio.
- If the NO GPS symbol/message is displayed
Refer to Circuit/System Testing With Navigation System - Step 9.
- Go to next step: If the NO GPS symbol/message is not displayed
- If the NO GPS symbol/message is displayed
- All OK.
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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.