OMalley

I have an early 06 LBZ, 4x4 leveled up with 295/75 R16 BFG all terains with 23K on the motor. I drove down from Wilson, NC to Augusta, GA and back last Friday. I averaged between 80 and 85 mph and averaged 19.4 mpg using the 500 ppm fuel going down and the 15 ppm fuel on the return trip. The ONLY mods I have is a Diablo chip set at 80 HP. No cold air box, no exhaust.

Just for reference, my father's 07' tahoe with the 5.3 at the same speed only gets 16-16.5 mpg (his multi cylinder shutdown NEVER comes on unless he is coasting)

yurs78

Awesome!