2007 Hummer H3 Q&A
2007 Hummer H3 Question: tune up
No it shouldn't need a tune-up, that's about the right gas mileage for this vechile. - bigray12
it wouldn't hurt but its not really due at this time - globalhelper
My Hummer will not start some times I have to let it sit 15 min then try to start it .I hear a wizzing sound like a loose belt.
Sounds like I ran over a cement block while baking up, but didn't change anything, then did the same thing while tuning forward, still didn't change. Pulled to the left bad the next day but that cl...
Down and almost shuts off do I need a tune up