OK I know it's not an F-Body but I just bought an 07 GMC Yukon about 6 weeks ago. The factory remote start shuts off after 10 minutes, which is a pain in the *** when I have dogs with me (I'm a K9 trainer so have dogs with me about 90% of the time). The only thing I can think of is that this 10 minute time limit GM implemented is in the PCM, so in theory I should be able to hook up a laptop to the PCM n change 10 minutes to 1000 minutes or something like that lol.

Does anyone know if this variable is in the PCM? And if so, does anyone know what software and hardware I need to edit this in the PCM of a 2007 5.3l V8 in a Yukon?

Any help would be appreciated