Let me just second that. Great post Liberty! Very good info in there. It seems that the PO300 code is fairly common on these cars, maybe somebody should sticky this? I know I am going to go back through the list and check off everything I can before mine goes to the dealer.

 

Liberty, where do you get the flow charts? I miss those from when I was a tech at GM.

Chappie, glad you got your car fixed. You had one of the few times when it was the ICM, Im glad you didnt throw alot of parts at the car to find the issue. As you read above that bugs me when people do that.

Massey