Ok so the reset for the TPM will hold for a few miles then comes back on. Mechanic has used his computer and sees all the wheel transmitters as well as the seeing that the BCM is in the "Learn" mode but that as far as he gets the system to go.

 

I have been down this very same road.

Plus key fobs will only work while sitting inside the vehicle.

Two locksmiths, two GM mechanics, my tire shop's techs and my personal trusted mechanic all say the BCM needs replaced.

Everything else works great, so when I get around to it and have the money to burn I'll buy a new BCM and shell out the funds to have it programmed for my Hummer........

 

Yep he was in the driver's seat and the door closed. I've got some CRD and dielectric grease I use to service (yearly) my fishing boat electrical connections. I'll unplug the BCM tonight, clean/grease the contacts. Probably won't get back to the shop till this weekend, if the problem still persist then I'll have to spend +/- 300 bks..