tune up on 2007 Hummer H3

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)
Thank you

Asked by for the 2007 Hummer H3
No it shouldn't need a tune-up, that's about the right gas mileage for this vechile.
1 more answer
it wouldn't hurt but its not really due at this time