This is off topic but it's time to turn in the tahoe. With 4 kids pretty much my only option is a suburban. I was really hoping they where going to put out the diesel version this year but they didnt. The tahoe pulled the boat ok and sucked when pulling a 30 ft travel trailer. Gas milage sucks too, the computer says i'm getting around 13 MPG (stock, with k&n replacement filter only). Now i'm wondering what a larger, heavier suburban is going to do and feel like. With gas prices on the up, i'm trying to think of some ways to improve it's MPG and give it a bit more power. I was thinking about adding a K&N system which is suppose to give it around 10 HP. Looking at their graphs though it only does that over 4000 RPM so i doubt this is going to help MPG or cruising at all. Another thing i've been thinking a lot about is a programmer, specifically the hypertech ones. They claim 2-4 MPG. Anybody have any thoughts or experience?