| I'm new to this forum, but for months I've had this "parking lot surge" problem. My normal service at the local GMC dealer said to fix the problem just buy a new truck. No help in other words ....! I might add I have 273,000 more or less trouble free miles on our 04 LLY Duramax, anyway, I took it to the local Chevrolet dealer and the problem was found quickly. It was the fuel pressure regulator. When checked it was producing reading all over the board at idle. So maybe you, like me, need to try another dealer. Good luck, Rofran |