Used 2003 GMC Sierra 3500 Extended Cab Consumer Reviews
Shoulda kept my FORD
Bob Sutliff, 01/04/2003
4dr Extended Cab 4WD LB DRW (6.0L 8cyl 4A)
0 of 1 people found this review helpful
Truck looks great! Fuel mileage (non towing) is not bad for a ton dually at 13 mpg. Towing is another story. Six (6) miles per gallon is the average for this 6.0L engine. Tow mileage is terrible and the truck is at its maximum performance on the interstate at 70mph. It absolutely has no power left.