Looking to boost fuel mileage

[WildBill]

I get 13-14 combined, 16 on the highway. When I got my Yukon I tried everything to raise the mileage...Tune, CAI, O2 sensors, plugs, wires...Standard tune up stuff. The O2 sensors added about .5 to 1 MPG. The CAI and the plugs/wires took some away.

Bottom line, 5000-6000 lbs, lots of drag, big tires = bad mileage. Be glad you dont have an H2, they are down by the single digits!

Best thing you can do is adjust your driving style.

 

[jimweis]

Shave the roof rack and add a front air dam.
I get 20MPG on the highway at 65-70 and mine is an AWD tahoe, 5.3 w/ 3.73 gear.

 

[ktmhans]

Shave the roof rack and add a front air dam.
I get 20MPG on the highway at 65-70 and mine is an AWD tahoe, 5.3 w/ 3.73 gear.

How did you do that air dam again, i think i remeber seeing a post on this but i didnt quite get it then either. Thanks