Get Instant Pricing with Edmunds Price Promise℠
1Look for "Special Offers" on a specific car
2Get your upfront, locked-in price from the dealer
3Go to the dealership to buy your car with no haggle
2003 GMC Sierra 3500 4dr Extended Cab Rwd LB DRW (6.0L 8cyl 4A) 4dr Extended Cab 4WD LB DRW (6.0L 8cyl 4A)
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.
Looks great, easy tod rive and quite comfortable for a ton truck with tow and snow plow features.
Increase torque to allow easier towing and increase performance to establish better mpg.