My Hummer H3 has 35,000 miles, do you think is it due for a tune up?
I changed the air filter
The MPG is about 12 and I drive carefully( 1/2 city, 1/2 highway)
Hummer Q&AAsk Your Question
2007 Hummer H3 Question: tune up
Answer #1bigray12 October 30, 2012, 11:43Rookie
No it shouldn't need a tune-up, that's about the right gas mileage for this vechile.
Answer #2Greg's Orange Auto (14262 Answers) , Orange, CA - (714) 361-9386globalhelper October 30, 2012, 12:44Master
it wouldn't hurt but its not really due at this time