2007 2500HD W/T 6.0. When the cab gets hot, ol girl will not start, wont turn over. Radio does not come on, SERVICE AIRBAG on the DIC pops up and the Security light flashes, which is odd because all security has been deleted. The blower for the A/C will come on. When you cycle through the DIC my trans temp says "---", no numbers. If I open the doors and let the cab cool, leave the key on, she'll usually fire up after 15 minutes. I have had this issue for about 4 years, but its happening every day now. Through a friend of a friend of a friend, said it might be the BCM, with my experience with a certain 07 Pontiac and a tail light issue, it could make sense. Just curious if any of you guys have any input or know what it takes to tune the new BCM. A key sequence or if a HP Tuner will work. I have been at a loss on this for quite some time. And I would hate to spend $180 on a Reman AC Delco BCM and it not work. Thanks for any help guys.

 

well, a new BCM did not fix my issue. At a complete loss over this.

 

Having the same issue! Were you able to resolve yours?

 

@funtwodrv that person hasn't visited the forum in 7 years. Please make a new thread and include all your vehicle and troubleshooting details. Thanks.