Overview & Reviews

For 2004, a single-rear-wheel 4WD version is available in all body styles. Additionally, GMC has slotted in a value-priced Work Truck trim level below the base model. Base models pick up a chrome grille and bumpers, along with cruise control, while SLE models get foglights and can be equipped with leather upholstery. New accessories include a lockable storage area under the rear seat, and a choice between a soft tonneau bed cover and a hard locking cover.

• Powerful drivetrains, roomy interiors, numerous available amenities.

• Spotty build quality, cheap interior materials.

User Reviews:

Showing 1 through 6 of 6.00

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  I will never own a GMC product again - 2004 GMC Sierra 3500
  By mikep16 - October 6 - 10:24 am

  From the Dealer using my truck to tow the owners horse trailer and adding 100 miles to it...to the more than $3000 I had to put into the electrical within 3 months-to the instrument panel stopping to work (speedo, then oil pressure, then battery-which comes and goes) $900 fix it so I just use a GPS for my speedo-to the rattle in the steering because of design issue always going out....to the electric seat positioning clicking 7-8 times before settling into place-to now the heater/AC blower stopped working and a cost of $750 to fix it at PEP Boys. Thanks to youtube the heater fix will only cost me $150 in parts. (my friend just had the same thing happen to his Tahoe and had to pay $750.

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  Duramax Power - 2004 GMC Sierra 3500
  By BigIron - October 17 - 10:00 am

  I haul a 116" Lance Legend camper and pull a 8x12 trailer with it loaded with ATVs and a motorcycle and the truck does all I want it to. I traded a Powerstroke in and I am pleased that I did. Its quite and rides and handles a lot better then my old Ford. I am getting around 12mpg at freeway speeds with this load.

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  2004 3500 Duramax 6.6 SLT DRW Crew Cab - 2004 GMC Sierra 3500
  By Pilot - April 9 - 9:00 am

  Ive had this truck for almost 4 years, and I have nothing but good to say. I have a 37 5th wheel, which when loaded is right at 16300 lbs and it pulls it great. Now Im not going to tell you that I dont know the 5th wheel is back there, but this truck is a joy to drive while pulling. Shell be paid for in a couple of months, and I plan to keep her for a long time.

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  Duramax Dually 2004 - 2004 GMC Sierra 3500
  By Gilles - June 25 - 11:26 pm

  I purchased the Sierra dually Duramax (LLY - 310hp & 605flbs) to pull a heavy fifth wheel and so far my experience has been trouble free. So far I am fully satisfied although I only have 30,000 km and time will provide more information on reliability of the Duramax. I find it fun to drive and fuel efficiency is good compared to the other diesel (Ford & Chrysler). It provide plenty of performance compare to a gas engine. The interior is perhaps blend as per the critics but it provides a price advantage compare to the Fords King Ranch. It does not take away from the performance.

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  GMC Sierra duramax - 2004 GMC Sierra 3500
  By Rich in suffolk - April 6 - 2:00 am

  You can always ask for more, but this truck gives the best of all I have ever driven. The Duramax is quiet and it seems to have more pep than my old 350 gas. Over the road unloaded I have gotten 22 mpg at I-95 speeds. Pulling a medium size 5th wheel is a pleasure. The allison transmission is absolutely super. I will buy another. By the way my other car is a Ford ambulance (diesel), the powerstroke is great but cant hold a candle to the duramax. The Dodge is just too loud.

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  Piece of crap - 2004 GMC Sierra 3500
  By Carlos Fernandez - July 31 - 10:00 am

  This was the worst vehicle i ever had. It broke down right as i was pulling out of the dealership. The dealership then actually charged me for towing it the 10 feet to the service area!! Turns out the axle was faulty. They also found that the radiator leaked too.