Quote:
Originally Posted by cosmick
You should actually have less aero drag than my 06, didn't read which engine you have, nor axle ratio, nor tire size, but with a 4.8 and 3.73s you should see 23 if you were 2wd, and you may want to try removing the front shafts until winter. With a 5.3 a 3.42 gear should also do 23.
|
I think the AWD is costing me a lot but I have no way to confirm it. I can't remove the front shafts because the transfer case has a viscous coupling with a 40/60 split to it. Without the front connected the transfer case would burn up within a mile or two. I have seriously thought about buying a used 4x4 transfer case, installing it and just making it stay in 2wd.
5.3 engine, 3.73 front and rear, 275/55/20 tires. The wheels are 20x9's which is a factory tire/wheel combo on newer GMC Sierra's.