GM Repair Problems? Ask GM Repair Expert Now.
Hi,I'm Ron and i will be helping you today.Stand by for a moment while I prepare your answer.
You are correct, the BCM may be the issue, or a bad ground in the system somewhere.
The way to isolate this issue is by attaching a scan tool to the computer system and applying bidirectional mode commands to the BCM to see how it responds.
Most parts store loan out scan tools too for a deposit.
Please understand that I don't know your skill level or toolsyou have to assist us. Also understand that I can't see, smell,hear, or touch the vehicle either, so your patience isappreciated. JA is a great Q/A site, but it does not replace arepair shop. So please don’t shoot the messenger if I have todeliver bad news:)If you are satisfied with my answer, I would greatlyappreciate a 5 star rating now before you leave the site and Iwill still assist you after you have rated me too if anotherquestion pops up. I don’t get credit for helping you untilyou rate me
No, that's only a code reader. Again, many parts stores have them to loan out.
Thanks again and please remember to rate me 5 stars nowand keep this link in case you need me again later on.I don’t get credit for assisting you until you rate me
Thanks again, Ron
Yep, thank you too.