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.
2007 Cadillac XLR BaseFACTORY OEM SERVICE PROCEDURE
Circuit/System Verification
IMPORTANT:
- It is important to have the vehicle in an open outside area where a cellular call can be successfully placed and global positioning system (GPS) data can be received from satellites.
- Placing an emergency call to the OnStar® Call Center should only be made if the diagnosis of the system leads to step 3. Immediately after an OnStar® advisor picks up the call, they should be told that this call is for diagnostic purposes only and there is no emergency.
- Press the OnStar® Call Center button. Verify a connection is not made with the OnStar® Call Center.
- If a connection is made with the OnStar® Call Center, go to Diagnostic Aids .
- Listen for other tones or cellular messages rather than the normal progression tones or the Unable to Contact OnStar® prompt.
- If no other tones or cellular messages are heard other than the normal progression tones or the Unable to Contact OnStar® prompt, go to Component Testing .
- Record all messages heard from the OnStar® Call Center button press.
- Press the OnStar® emergency button. Verify a connection to the OnStar® Call Center is made within 10 minutes.
- If a connection is not made within specified time, go to Component Testing .
- Hear all messages during the course of the tests available, use the scan tool to access the STID, ESN and Transceiver I.D. and contact the General Motors Technical Assistance Center.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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