I have a 2000 monte carlo with a 3.4 l engine. About a year ago I put another radio in it and when I went to start it, well it wouldnt start. I went through all of the motions, turning the lights off and on, didnt work. I then did the turn the ignition on for 20 minutes and it started right up. The security light was on and has been on ever since, however, the car never failed to start since. About a week ago, the battery went dead and I have not been able to get the car to start since. I have tried to leave the ignition on, etc. and I eventually replaced the entire ignition switch. I still cant seem to figure out what the problem is. I have heard mention of the bcm. Could it be this, and if so where is the bcm located. I would greatly appreciate any recommendations that might help me resolve this issue.

 

I also had my BCM replaced this year. I had a viper alarm and remote start that was back feeding on my BCM which caused it to fail a lot. I took my car to the dealership and it was around 275 to get a new BCM and have it installed. It's a small box about 6 by 6 inches usually grey and black.

And Welcome to the forum!

 

Welcome to the forum. Start a thread in the other section. You should get more response there.

 

Welcome to the Forum & hope u can get ur monte fixed up & running again