[techsupport]

the update isnt that bad it takes a while about thirty minutes. even if they totally messed up and killed the pdim your car will still run just not have the aux input working.I dont know if that is you problem though. You might need to get your onstar module updated because it sounds like it is the problem. I will look for some info on this at work tomorrow and see if there is any info on this type of problem that way you can tell them how to fix it.like i said before though even if they were to kill both of those modules your car will still function as long as they dont mess with the pcm, or tcm. With this problem they shouldnt even go near either one of those. hope this helps and ill check back tomorrow to let you know if i find anything