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 Oscar

by in Penfield, NY on October 30, 2012
2 answers
ANSWER by , October 30, 2012
No it shouldn't need a tune-up, that's about the right gas mileage for this vechile.
ANSWER by , October 30, 2012
it wouldn't hurt but its not really due at this time