Used 2003 GMC Sierra 2500HD Extended Cab Consumer Reviews
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Power Plus
jamminjay, 07/17/2003
2003 GMC Sierra 2500HD 4dr Extended Cab SLE 4WD LB (6.0L 8cyl 4A)
6 of 7 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.
Been driving this truck since new
T, 09/20/2021
2003 GMC Sierra 2500HD 4dr Extended Cab SLE Rwd LB (6.0L 8cyl 4A)
2 of 2 people found this review helpful
Bought the extended cab gas 6.0l engine with the 480LE transmission combo in 2003. Currently has 250k+, and other than a tranny rebuild at 150k and normal maintenance issues, this thing is a champ. Keep up with fluid changes, no problems. Has towing and carrying cap, no problems and it rides better loaded out with 1500 poinds. HEAVY undercarriage construction. Still running smooth and still with original plugs
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2003 GMC Sierra 2500HD for sale near you
Showing 3 of 24 listings
- Work Truck Regular CabMSRP: $8,99847 mi away
- Standard DieselMSRP: $13,995612 mi away
- SLE Diesel Crew CabMSRP: $18,995655 mi away
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Excellent Duramax Diesel!
Dave Hardin, 03/07/2003
2003 GMC Sierra 2500HD 4dr Extended Cab SLE 4WD LB (6.0L 8cyl 4A)
4 of 6 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!
Good, bad, and ugly
Ted Sparling, 02/25/2005
2003 GMC Sierra 2500HD 4dr Extended Cab SLE 4WD SB (6.0L 8cyl 4A)
1 of 1 people found this review helpful
The Isuzu engine is the best part of this truck, along with the Allison tranny. The worst part has been all the GM stuff. Everything from numerous AC problems to leaks, memory features deleting themselves, multiple transfer case problems for auto 4WD, and leaking fuel injectors. If it were not for the dealership's attitude and incompetance i would buy again.
Not Impressed
cynical13, 11/27/2004
2003 GMC Sierra 2500HD 4dr Extended Cab Rwd SB (6.0L 8cyl 4A)
1 of 1 people found this review helpful
I bought this truck as a replacement for my 96' 1500 as I needed more muscle to tow a 5th wheel trailer. The 8.1L has plenty of punch, but I struggled with traction on anything less than dry hard surfaces. I have already experienced the typical Chevy/GMC parking light burn out on one side that they can't seem to fix and I have had numerous fuel indicator malfunctions. The fuel consumption is killing me and towing or not is not much difference. Ready to look for an older/smaller model again!