dont know about the other issues, but where did you get the BCM from? They are a 1 time use thing. You have to replace with new and it has to be programmed while in the car by either a dealer or someone with a techII programmer/scanner.
Posted: Tue Sep 13, 2011 7:53 pm Post subject: The 9C1 BCM
was ordered from Rock Auto. And our school has several GM techs teaching there, it will cost me $5.00 to have them program it. But before the BCM arrives, I am hoping to find out if it is the issue or something else is causing these issues.
Posted: Tue Sep 13, 2011 8:55 pm Post subject: But....
BBEngineer says that the a/c is not controlled by the BCM. And he seems to be a smart guy on the forums. So, it seems it is time for me to do some checking...
So, I just walked out to the car, and started pulling fuses to see what would happen. I pulled the BCM fuse and as I mentioned, the car still ran but I had no cruise, no abs light, but no Security light either, car just started right up.
I then installed the BCM fuse and then pulled the CLUSTR/BCM fuse. I had no insturment panel lights, the gauges did not move or light up. Still no cruise. But the lights on the a/c went out. No door lock issues. No Security light.
I think you are right. The BCM is old (2002). The BCM fuses have a effect on the rest of the car's operation. Take out the BCM and the Security lights do not show up. And I did replace the two parts of the ignition, the switch and the cylinder, with new parts. The a/c fan control on the dash might be bad since the lights were already out on it, I can accept that. But the Security light issue and not starting right up has drove me crazy ! lol !
So, I will drive the car as it is now (will my ABS still work if I pull that single BCM fuse ?) until the 22nd of Sept, I then go in to have the new 9C1 BCM programmed.
Posted: Thu Sep 22, 2011 9:40 pm Post subject: Update......
Got my new BCM installed today ! All problems mentioned have not shown back up. Car starts as if new, NO jumping of the gauges when starting, NO Security light when starting. A/C works correctly. Door locks work correctly. ( They did program the locks to lock when car is put in drive and all unlock when put in park, I know I can change this if I reinstall the original radio. I am not sure about the traction control, since there's no button to cut it off, this car being a 9C1. And they also activated the DRL's... Don't know about that one! Thanks all for your help
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