Hi
On my 03 gasser,i had the ongoing message"trying to contact Onstar" and the radio or CD wouldn't work.I found the Onstar modal and unplugged it.Problem solved.
It was behind and above the glovebox.GM would not give me any info about it,they wanted me to bring in the truck to get scanned on their computer.I hope to never darken their rollup door.
Thomas
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews