Originally Posted by Topher5000
...The tech ends up blaming my flash drives (a Duracell & a Sandisk Cruzer Micro) since his plays in the car & mine play on his laptop (???)....
It's not your flash drives. I use the Sandisk Cruzer Micro, and since I installed PN20985421, it works just fine. It's your PDIM.
This is rediculous. The 2010 PDIMs are junk. This is a widespread problem, and if GM was on the ball, they would meet you in the service drive with a new PDIM in their hands.