HUMMERDAD
Well-Known Member
- Messages
- 141
- Location
- GraysLake IL
Has anyone had there gas milage drop. I have been avg 14gm to 16gm and all of a sudden it just droped to 10 to 12gm yes I know these are not the best on gas didn't buy it for that now with that beging said. The H2 been running fine so no tune up yet, had onstar do a dino and got nothing. My wife drives it and the last time I drove it she just seemed like she pulling a trailer. with no trailer, well I figured tune up maybe I got 14100,000 I just havent seen what all involved with the tune up on these things, other then the stander plugs, wires, fuel filter,air cleaner. Is it just that simple or is there more involved?? I had been getting around 400 miles to a tank and now she's down to 326.
Last edited: