Used 2003 GMC Sierra 2500HD Extended Cab Consumer Reviews

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$2,737 - $5,530

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Pros
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Power Plus

jamminjay, 07/17/2003
4dr Extended Cab SLE 4WD LB (6.0L 8cyl 4A)
5 of 5 people found this review helpful

2003 Sierra with 8.1 liter 345 HP and Alison Auto. Plenty of power for towing. A little hestitant on take off when cold. 20,000 miles in 6 months and it runs like day 1. Fuel mileage is absolutely HORRENDOUS!!!! Towing an enclosed race car trailer x-country avg. mileage = 7.95. Driving enmpty no load at all avg. mileage = 12.98.

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Excellent Duramax Diesel!

Dave Hardin, 03/07/2003
4dr Extended Cab SLE 4WD LB (6.0L 8cyl 4A)
2 of 4 people found this review helpful

Don't want to spend to much time here, but if your thinking about buying this vehicle w/ this motor, all I would say is "do it". It awesome!

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Nice for towing

john gentry, 08/22/2005
4dr Extended Cab SLE Rwd SB (6.0L 8cyl 4A)
1 of 1 people found this review helpful

This truck was bought for towing and does a great job pulling our fifth wheel camper.

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??

Ralph gallo, 07/20/2003
4dr Extended Cab SLE 4WD SB (6.0L 8cyl 4A)
0 of 1 people found this review helpful

this is great truck ! no question about it .

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Duramax and Allison are superior

Jim T, 10/29/2009
4dr Extended Cab SLE 4WD SB (6.0L 8cyl 4A)
0 of 0 people found this review helpful

I have owned this truck since new in 2003. Only in the last several years have I used it to its full potential. I have pulled a 10,000 lb fifth wheel to Florida twice and a new 12,000 lb fifth wheel to GA last week and I averaged a little over 13 mpg. On the return trip I got over 24 mpg running at 70 mph all day. I do have a tonneau cover for the bed which might help. I first took this new truck to Ohio in 2003 and only got 22 mpg with the same configuration. I did add a K and N air induction system before my last trip but this truck pulls like a champ without any additonal brains or Banks kits. The 5 speed transmssion is smooth and I know improvements have been made in the 09's.

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