2003 GMC Sierra 3500 Extended Cab - Consumer Reviews

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Shoulda kept my FORD
By Bob Sutliff on 01/04/03 00:00 AM (PST)

Vehicle

2003 GMC Sierra 3500 Extended Cab 4dr Extended Cab 4WD LB DRW (6.0L 8cyl 4A)

Review

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.
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