Overview & Reviews

Both light- and heavy-duty 2500s sport new torsion bar front suspensions. Light-duty models now offer optional traction control and standard child safety-seat tethers. Heavy-duty Sierras are completely redesigned for 2001 offering two new engines and transmissions, bigger interiors and numerous other improvements aimed at buyers looking for a "professional grade" truck from GM.

• Class-leading engines and hauling capacity, roomy interior, superior brakes.

• Unproven engines and drivetrains, cheap interior materials.

User Reviews:

Showing 1 through 10 of 20.00

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  seats not up to mar - 2001 GMC Sierra 2500HD
  By brian - October 23 - 10:00 am

  For a top of the line truck that listed for over $32000 new you would think the company would put in better seats ;such as more padding in the bottom seat and go back to having the whole seat move by power not just the bottom. (this is for the cloth seat). the seats in my 1997 were more conforbly , other than the seatr it is an excellent truck.

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  The Best Trruck On The Road - 2001 GMC Sierra 2500HD
  By JOE_FROM_MO - May 4 - 10:00 am

  I love my truck. It was bought to work and it does that. There is a lot of Maintnaice on this truck though. The style and beauty of this thing is awsome. I like the looks of this truck more than the new ones, but you know how guys are. We want the latest, greatest thing. Im sick of having to replace the main engine drive belt every 15000 miles. It starts squiling and I cant handle that. And it sucks the dealer never has the parts to fix a damn thing when you take there. You have to go back and forth two, three, or sometimes four times before anything gets fixed. great big bummer since there is not a dealer anywhere close to where i live.

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  Pleased - 2001 GMC Sierra 2500HD
  By M. Fisher - December 7 - 2:00 am

  My GMC is equiped with the 8.1 liter engine and Allison 5 speed transmission. I tow a 26 foot travel trailer and cross the US frequently. The trailer weighs 7500 pounds, loaded. I have had no problems with performance and it has ample power in the mountains (Rockies). The only down side was the difference in the cost of oil changes at GM dealers. High of $32 low $17.

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  The Best Truck Ever!! - 2001 GMC Sierra 2500HD
  By Pullin IT - October 28 - 2:00 am

  Ive never owned a better truck. All the power you ever want without sacrificing fuel mileage. Hook it to anything and go anywhere. Great ride like a Caddy. No noise. Luxurious

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  First two years were heaven. - 2001 GMC Sierra 2500HD
  By T1 - June 4 - 10:00 am

  This last year has been quite another story. Ive had a complete Brake job including replacing all four rotors which were fine 2500 miles before. The sudden complete failure of all four brakes cost 1600 dollars for that. The four wheel drive switch has gone twice causing the truck to shift in and out of gears and fall out of 4WD. This also caused premature wear of the U-joints, which needed replacing. The fan motor now is going and needs to be replaced. The engine burns a quart of oil every 2200 miles and knocks like mad for the first five minutes of run time until its warm. The engine also knocks if I use any gas other than premium.

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  MY 2500 HD - 2001 GMC Sierra 2500HD
  By MY 2500 HC - May 16 - 2:00 am

  Overall Good Truck. I am impressed with the sturdiness of the truck. The 6.0L has provided plenty of power with only occasionaly towing. However, the engine began knocking for the first 5 minutes on start up at about 17000 miles. GM says its o.k. but extended the engine warranty to "make me feel better." Had to have work done on steering column as it began knocking when I hit bumps. Speaker in passenger door had to be replaced. I am now noticing some delay or slip in the transmission when the stop light turns green. A little scared where this all might lead. Dont have the Allison.

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  My 2500-HD - 2001 GMC Sierra 2500HD
  By reeddallas - May 2 - 2:00 am

  I have owned many new vehicles from trucks to sports cars from Prosches (2), Corvettes (2), VWs (3), Fords (6), Dodges (1), Chevys (2), Mercedes, to Buicks (2). I have never owned any vehicle that has given me the driving satisfaction of never having a squeak, squeal, rattle, or mechainical problem: From dealer lot to 24,000 miles this has been an excellent vehicle and I congratulate GM for delivering the value. I gave this vehicle a relatively poor rating for gas economy but I do like the 6000 Vortec engine and I knew the gas requirements before I purchased the truck: Id buy this engine again gas economy notwithstanding.

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  Duramax Diesel 2500HD Ext Cab 4X4 - 2001 GMC Sierra 2500HD
  By winndixie - September 20 - 10:00 am

  Absolutely love this truck. Will buy one again in a couple years. The only thing I wish GM would improve is the turning radius for the long bed and stiffen up the fleet side metal... leaning against the outside truck bed wall, I pushed the metal in... it popped back out but left a slightly noticable dent. Also interior could make use of wasted space in the dash board below radio with bench seats.

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  SLT 2500HD 4WD XCAB SB 8.1L ALLISON 5SPD - 2001 GMC Sierra 2500HD
  By M HILL - January 11 - 2:00 am

  This is one awesome truck. We are appreciative of the creature comforts, all around visibilty, safety/security features and OnStar. I pull a 30 foot 5th wheel, (about 11000 pounds) and have been very impressed with the trucks ability and ease of maneuverability. I regret I didnt wait for a DuraMax, but Im getting along fine without it.

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  Ill only buy Duramax - 2001 GMC Sierra 2500HD
  By Max-This - December 8 - 11:50 am

  This is by far the greatest and most comfortable truck ever made. And if power and performance are what you want then this is the truck for you. The only trouble I had was with the injectors and luckily they were covered by the LB7s extended 7year/200,000mile warranty. Other than that I have never had trouble with this truck. Plus the aftermarket for Duramaxs is so wide open to your imagination.