[67ChevyRedneck]

If you do any kind of city or mixed driving I would only expect 14-15mpg max out of a Tahoe. Maybe 16 if it's a 2wd and you have a light foot. On the highway a 4x4 should have no problem getting 18mpg, and some people get 19-20 out of the 2wd's.

Just don't want you to be disappointed. 13-15 is pretty much the average for any full size V-8 SUV.

My Z71 doesn't see the highway much at all, I seem to average 14mpg pretty consistently. It will hit 18+ but it has to be almost a 100% highway tank.

I used to frequent GM-Trucks.com and there was a lot of satisfied people there with the waitforme tunes.