My 2001 2500 hd gets at it's very best tank 10.5 That's driving around town with maybe 1/2 highway. I normally get right at 9 in town only. Never taken on a road trip so don't know highway miles.
The 2001 GMC Sierra-2500HD is a gas-powered vehicle.
The 2001 Chevrolet Silverado-2500HD is a gas-powered vehicle.
The gas tank on the 2001 GMC Sierra-2500HD holds 34 gal..
The gas tank on the 2001 Chevrolet Silverado-2500HD holds 34 gal..
I have a 2009 2500HD with the 6.0 litre V8. Its gets around 14 with general driving. slightly better over the road.
21mpg
The 2001 Chevrolet Silverado-2500HD has 16 valves.
The 2001 GMC Sierra-2500HD has 16 valves.
The 2001 GMC Sierra-2500HD has a V8 engine.
The 2001 Chevrolet Silverado-2500HD has a V8 engine.
20mpg
The average gas mileage of a 2001 Alero is 24 miles per gallon. This data comes from researching 21 vehicles after 889 fuel-ups.