Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Should this read "Hi Mike. I have a 2003 1500hd with random misfire issues. I have replaced many things but no change. At idle it stumbles but doesn't throw the code. Only above 2000 rpm it seems to run better. When driving in the rain or after washing it. I checked and cleaned all grounds. What am I missing? "