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
- Verify the battery cable connections are clean and tight and verify battery voltage is between 12.0 - 15.0 V measured at the battery terminals.
- If not within the specified range
Refer to Battery Inspection/Test
- Go to next step: If within the specified range
- If not within the specified range
- Verify the customer has the Proactive Alert SAC005 from OnStar, or by using the Scan Tool "Vehicle Diagnostics" - "Vehicle Proactive Alerts", or Service Workbench Alerts.
- If Proactive Alert SAC005 is present.
Refer to Circuit/System Testing.
- Go to next step: If Proactive Alert SAC005 is not present.
- If Proactive Alert SAC005 is present.
- All OK.
If the concern is still present after following the steps for Diagnostics in any of the Proactive Alert Identifiers, contact GM TAC for further assistance. The GM TAC Agent will arrange for the stuck Proactive Alert to be cleared from OnStar Back Office.
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.