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Tahoe Hybrid,
I agree to disagree on the drag coefficient. All I know is the GM published figure for the gmt400 platform. You think it is higher, aerohead thinks it is lower.
I don't know about a 1995 with the 5.7, but the 1994 GMC Suburban K2500 i was driving with the 6.5 was returning 24-25 MPG consistently in normal use. These tanks were a mix of some city, some interstate, some hilly backroads, and some highway. Speed limits between 35 and 70. Often with significant loads in the back. Definately not ideal conditions. Also 4.10 gears in the diffs aren't helping, needs 3.42s.
It is a bit out of commission at the moment seeing how I cut it in half.
I also have many thousands of miles past experience driving a 1991 k2500 pickup with the 5.7, that would get 12-13 with the 4l60 and 15-18 with the early NV4500. Tire choice was the biggest variable there, 15 on the all terrain 18 with the street tread.
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