Circuit/System Verification
- Verify the OnStar system is operating properly. Refer to OnStar Symptom Diagnosis .
- With a master vehicle key, turn the ignition ON.
- Observe the security indicator. After approximately 10 minutes, the indicator will turn off.
- Turn the ignition OFF and wait 5 seconds.
- Repeat steps 2-4 two more times for a total of 3 cycles or 30 minutes.
- With a master vehicle key, turn the ignition ON. The start disable will now be cleared.
- With a scan tool, clear any DTCs.