Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › P0003a code on a 20011 Gmc 2500hd › Reply To: P0003a code on a 20011 Gmc 2500hd October 20, 2020 at 8:44 am #986777 Ray ThomasParticipant Thanks, it is 68 miles to Casper, do you think I should have it towed or just drive it? I drove it quite a bit yesterday.