2003 GMC Sierra 2500HD Review | Edmunds.com

2003 GMC Sierra 2500HD

GMC Sierra 2500HD Features and Specs

Features & Specs

  • Engine 6.0 L V 8-cylinder
  • Drivetrain Rear Wheel Drive
  • Transmission 5-speed Manual
  • Horse Power 300 hp @ 4400 rpm
  • Fuel Economy 0/0 mpg
  • Bluetooth No
  • Navigation No
  • Heated Seats No

Review of the 2003 GMC Sierra 2500HD

  • With its powerful engine lineup and revised interiors, the heavy-duty Sierra makes a strong case for itself against the competition.

  • Safety
  • Pros

    Powerful drivetrains, roomy interior, numerous available amenities.

  • Cons

    Spotty build quality, cheap interior materials.

  • What's New for 2003

    The Sierra gets a revised look this year that includes a new front fascia, revised side moldings and optional multifunction, fold-away mirrors. On the inside, GMC has added new seats, a more comprehensive driver information center, a redesigned instrument panel and optional dual-zone climate control and satellite steering wheel controls. On the hardware side, the standard 6.0-liter V8 gets electronic throttle control as well as the ability to run exclusively on Compressed Natural Gas (CNG) or a mix of CNG and gasoline. Other upgrades include an improved Insta-Trac part-time four-wheel drive system for reduced service costs, a more efficient starter for the 8.1-liter V8 and a revised headlight switch that allows drivers to turn off the daytime running lamps.

What Others Are Saying

Customer Reviews



Fuel economy

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Vehicle: 2003 GMC Sierra 2500HD 4dr Crew Cab SLE 4WD SB (6.0L 8cyl 4A)

I've had my 2500HD for just under a year now and I LOVE it. The only problem I really have is its fuel economy. I average around 14 mpg, but where it lacks fuel economy it makes up for it in power. I haul around a skidsteer on a 14 ft open trailer. The skidsteer weighs more then my truck but still no problems pulling it. The fuel economy doesn't really change weather your hauling or not. I just purchased an SLR performance chip that should do the trick. This truck is perfect for anyone with the money to pay for gas.




Duramax and allison are superior

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Vehicle: 2003 GMC Sierra 2500HD 4dr Extended Cab SLE 4WD SB (6.0L 8cyl 4A)

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.




Truck of the year

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Vehicle: 2003 GMC Sierra 2500HD 4dr Crew Cab SLE 4WD LB (6.0L 8cyl 4A)

Fuel milage is great, 15-18 mpg.Steering column has presented a few small issues allong with sticky power mirror on the drivers side - replaced once.




8.1l tons of gas power!

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Vehicle: 2003 GMC Sierra 2500HD 4dr Crew Cab SLE 4WD SB (6.0L 8cyl 4A)

The torque and power of the 8.1L is incredible, but be aware at the gas pump. An average of 9.1 mpg will be all you'll get. Towing large campers or trailers is no trouble what-so- ever. Especially in lower range gears the 8.1L begs for more. All around I love the truck, including a great interior and stock stereo.



1 of 1 people found this review helpful

Nice for towing

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Vehicle: 2003 GMC Sierra 2500HD 4dr Extended Cab SLE Rwd SB (6.0L 8cyl 4A)

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




Good, bad, and ugly

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Vehicle: 2003 GMC Sierra 2500HD 4dr Extended Cab SLE 4WD SB (6.0L 8cyl 4A)

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.



Full 2003 GMC Sierra 2500HD Review

What's New for 2003

The Sierra gets a revised look this year that includes a new front fascia, revised side moldings and optional multifunction, fold-away mirrors. On the inside, GMC has added new seats, a more comprehensive driver information center, a redesigned instrument panel and optional dual-zone climate control and satellite steering wheel controls. On the hardware side, the standard 6.0-liter V8 gets electronic throttle control as well as the ability to run exclusively on Compressed Natural Gas (CNG) or a mix of CNG and gasoline. Other upgrades include an improved Insta-Trac part-time four-wheel drive system for reduced service costs, a more efficient starter for the 8.1-liter V8 and a revised headlight switch that allows drivers to turn off the daytime running lamps.

Talk About The 2003 Sierra 2500HD

Gas Mileage

EPA-Rated MPG

  • Not Available
  • cty
/
  • Not Available
  • highway
Calculate Yearly Fuel Costs
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