Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
I took the new bcm to the dealer to have it installed and programed. Car started when I left and again later but then did not start when tried and hour later.
OK, try the relearn again.
Important: The vehicle learns the PasslockTM Sensor Data Code and/or password XXXXX the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
The system will prevent the engine from cranking. I suggest we try this first.
security light telltale went out after the first ten mins as you said but after relearn all I get is the security warning on dash and battery symbol cause it will not crank. engine symbol is also lit
ok should I try to start after this or come back here?
OK, lets try something different. Using a test light see if there is power on the small stud at the starter when the key is in start.
Ok, does the starter relay in the underhood fuse block click when you try to start?
yellow wire going from ignition switch to BCM?
when I turn key to start position there is power on that wire
OK, Does anything happen in neutral when you try to start?
We are almost near the end of what we can check with out a scan tool.
What is happening is the computer is not commanding the starter relay to engage. You are getting power from the switch on the yellow. The yellow goes to the PCM, not the fuse block. Below is a schematic.
but even when I jumped the starter and the engine started, it quit right away like the security system had cut the fuel
I would get a diagnostic done. We are at the end of what we can test.
HERE is the no start diagnosis.
ok sounds like I need to get it in to the dealer. Hopefully I can get it started. I have had luck unplugging the plugs on the BCM and replugging and then it starts.
wish you were the one working on it for me.
Thank-you for all your help and I wish I could get back to you with the result. With your next reply I will accept your answer because Sir you earned your money and more
Thank you Sir for your help this far and I will accept when you say good night. It has been good to know you and your expertise is greatly appreciated.
Thank you and Good Night