I get around 11 mpg's right now on my 2002 but it all depends on how well it's been taken care of, how many miles are on it, driving conditions, quality of the diesel (winter-blend, old, new), etc.
A 2002 Chevy duramax has 300 horsepower stock
The Allison
10 quarts
dealership, ebay.com, or local salvage yard
if it is diesel a duramax diesel if its gas it will be a duramax
I have a 2002 Chevy tracker and it gets anywhere from 28 to 25 miles to the gallon.
31-32 mpg
No, the duramax wasn't made until about 2000
location of fuel pump 2003 chevy 3500 duramax diesel
Duramax
The Chevy Duramax has an amazing top speed of 140 MPH. The Chevy duramax is pushing 350 hp. with 6600 flbs of torqe at 3200 RPMs u can disable it with the PPE Tuner Or Efi Live.
Probably the best way to get better fuel mileage would be to get a tuner for it.