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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  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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  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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  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.

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  1% Customer - 2001 GMC Sierra 2500HD
  By PhlatOut - October 25 - 10:00 am

  This truck drives like a half-ton and works like a one-ton. For its size it is remarkably easy to drive. The seats are very comfortable, even on long trips (bucket seats w/console). For a 6.0 liter 3/4 ton truck I have gotten good gas mileage most of the time (14mpg mixed driving, 17mpg peak highway).

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  Towing Superstar - 2001 GMC Sierra 2500HD
  By ran - May 12 - 2:00 am

  I live in Michigan and tow a 35 5th wheel camper to North and South Carolina 4 times a year. The trailer weighs 13,500lbs and this truck will take on any mountion on I-77 in the Virginias. I get 7.5 mpg average towing which is much better than my 98 truck that had the old 454.

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  Beats my wifes F250 - 2001 GMC Sierra 2500HD
  By DBo;an - April 2 - 10:00 am

  I bought the Duramax, had a 2001 f250 figured Id try it. Man let me tell you, quite as a mouse compared to Dodge and Ford and the power surprised me. the leather is no comparison to Fords, (does Dodge have leather?) When we moved from W. Colorado to Central TX I pulled a trailer ( over 8,000 lbs) over those mountians not even much strain, fact had to wait for the Ryder at the top, but no surprise there. My wife wants one now, the ride is like a good sedan and Im not kidding its that good, my fuel varies between 20 - 21 mpg our Ford around 16mpg 4 people who have driven my truck bought one, best vehicle Ive ever had.

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  GMC HD - 2001 GMC Sierra 2500HD
  By Harris - June 20 - 4:10 am

  Best vehicle I have ever owned. Still smooth and powerful after 150,000 absolutly trouble free miles. Ford and Dodge probably have as good an engine, but no way can they match the Allison/Duramax as a package. I used to trade trucks every year, but I still enjoy this one so much I want to see just how long it will go.

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  better than ford - 2001 GMC Sierra 2500HD
  By v8loverr - June 4 - 10:00 am

  I think that GM did a great job on the new 2500 HD Crew Cab. I had a 1500 extra cab and when I saw the Crew Cab I had to have it and I have loved it sence. I feel that everyone should get a 2500 HD. It has it all onstar heated seats and all the goodies. So go and get this truck you will be happy with it.