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Two weeks ago I tried gaining access to the car and discovered my remote was not working. After replacing the battery in one remote and trying the other remote, nothing worked. Used the key to gain access and the alarm sounded the horn. The horn sounded weak. The battery was dead, so the battery was replaced. Took the car to the dealership because the alarm would not shut off and my remote was not working anymore.
Week 2 has gone by and the dealership here in Fargo, ND has little to go on.
A dead battery spawned numerous issues. The BCM has been replaced and remotes re-programmed. After that, the BCM was not talking to the ECM and two more power switches were replaced. Now everything communicates and the car functions with one exception. The engine will turn over but not start.
i know there is a security relearn, i never tried it, saved this info from another person that was having trouble. seems it would turn over but not start...
Car started with different BCM after security relearn.
sit in car, all doors closed. attempt to start car and hold start button for 3 seconds clutch in, nothing happens. Then wait for 10 mins until security light goes out.
Then turn off for 30 seconds.
Then attempt to start again as in step one holding button for 3 seconds. Then wait 10 mins for security light to go off.
Then again turn off for 30 seconds.
Then again attempt to start holding button 3 seconds lol, wait 10 mins for security light to go off.
Then again turn off for 30 seconds.
Then it started. and security light never came back on.
Thank you for the advice, GM was called by the dealership and I'm not sure what transpired.
I will forward this information to the mechanic and update this thread.