Mikemarti02
Newbie
Hi guys, I have a 1995 gmc k1500. It’s got 33s with aluminum rims, and I get 9mpg. Best I ever got was 13 on the highway and that was once. Usually around 11 combined. I will get an engine light if I run it more than 20 mins, but it self erases every time and I cannot read it. It has a little stumble here and there. Anyone have any ideas on what it could be?