Overview & Reviews

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.

• Powerful drivetrains, roomy interior, numerous available amenities.

• Spotty build quality, cheap interior materials.

User Reviews:

Showing 1 through 10 of 26.00

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  EXHAUSTED - 2003 GMC Sierra 2500HD
  By Frustrated Rancher - July 23 - 10:00 am

  Disappointed in the power. Tried to pull a 16 stock trailer with two bulls. It was all it could do to get over a small hill. Constant air conditioning problems. Unscrupulous dealership tells me it has been repaired. Lies. Electric window problems. Needs larger fuel tanks for a truck that gets 13mph. Wears front tires knobby. Stress cracks in the windshield. Brakes squeel. Tapping in the engine. Would I buy again. No Chance. Off to the dealership for engine noise;AC repairs again. Watch out Ford/Dodge, here I come.

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  Not Impressed - 2003 GMC Sierra 2500HD
  By cynical13 - April 11 - 10:33 am

  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 cant 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!

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  Not so happy with my 2500HD - 2003 GMC Sierra 2500HD
  By Tim - October 15 - 2:00 am

  I had a dent on the hood when I purchased the truck. The push button 4 wheel drive went out (defective switch). The passenger side door module went bad (havent got it fixed yet, they cant get the part). The truck has 1300 miles. These trucks arent cheap and so far Im not impressed. GMC needs to clean up there act!