Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi Peter, I am Cam.Is this the factory system or an aftermarket one?
Lets try a reset.Take the battery cables off the battery, hold the ends together for 10 seconds then attach them to the battery and see what happens. This will reset the whole vehicle.If you have 2 batteries, then remove both and touch only one set.
See if this changes anything.
Ok, this would indicate to me that the Body Control Module (BCM) may have failed then. IF the locks cycle and the system does not disable that’s usually a module issue.
Does it show any body codes?Does the engine start and run?
OK, does the engine start and run, meaning has this disabled the engine starting and the pass lock system?
OK, have you tried the pass lock relearn?
Turn the key on and attempt to start the car, It may crank, it may start and stall or it may do nothing at all, this is fine, still cycle the key to start then release the key back to run. Wait 10 minutes with the key in run. The passlock light should be flashing and the DIC will say "Service Vehicle" or "Security" or have a picture of a car with a lock during that 10 minute span.After 10 minutes has passed, turn off the car, count to 10, and try to start it again and release the key back to run.Wait another 10 minutes.After 10 minutes, turn car off 10 seconds and try to start again and release the key to run.Wait another 10 minutes.After 10 minutes, turn car off 10 seconds and try to start again.It should start up this time. The passlock has been learned.
During this process, turn the fans off, radio off and cycle the headlights off so the battery will not go dead. If needed, use a battery charger.
Yes, once it stalls, leave it in the ON position for the time.
It should flash but may not. Proceed all the same and see what that does.
NO, the only way to do this is the 30 min procedure or with a programming which takes 10 mins. The programming needs the GM programming server.
OK, so I think your Bcm is faulty. Can you show the data display from the BCM?
Yes, data display from the Tech 2.
While your getting that, I am heading to the hardware store for a bit. Beback in 15-20.