2006 GMC Sierra 2500HD Review
Price Estimate: $4,197 - $6,905





+37
GMC Sierra 2500HD model years
GMC Sierra 2500HD types
- Regular Cab
- Crew Cab
- Extended Cab
Edmunds' Expert Review
by the Edmunds Experts
Pros
- Powerful engine lineup, multiple drivetrain configurations, substantial towing and hauling capacities.
Cons
- Spotty build quality, mediocre design and interior materials.
What’s new
For 2006, the Duramax diesel engine receives a host of power and refinement upgrades, as well as reduced emissions. The Allison automatic transmission is now a six-speed, and features a tap-shift range selection mode. The camper-style mirrors have been replaced by a folding and extending design with a built-in convex spotter glass. Trim levels and packaging have also been juggled.
Edmunds says
With its numerous powertrain and cab configurations, and stout towing and hauling capacities, the Sierra HD is a hard truck to beat for those who need maximum functionality and capability.
For sale near Tucson, AZ
41 listings
- 235,360 miles
- 1 accident, 5 owners, corporate fleet vehicle
- 6'7” bed, 6l, 8cyl
- Double H Auto Exchange (81 mi away)
- AWD/4WD
- Leather Seats
- Power Driver Seat
- Multi-Zone Climate C...
- Alarm
Close
Located in Queen Creek, AZ
Visit Double H Auto Exchange.com in Queen Creek to shop our certified vehicles. Your East Valley dealer near San Tan Valley Mesa Gilbert and Chandler...
AutoCheck Vehicle History Summary
Accident Free Vehicle: No
Personal Use Only: No
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GTHK23U06F269905
Stock: B24072X
Certified Pre-Owned: No- 111,127 miles
- No accidents, 1 owner, personal use only
- 6'7” bed, 6l, 8cyl
- Casa Chevrolet GMC (298 mi away)
- AWD/4WD
- Leather Seats
- Power Driver Seat
- Multi-Zone Climate C...
- Alarm
Close
Located in Alamogordo, NM
Welcome to the NEW Casa GM, where you will see the same same friendly faces with a new family owner. FREE Delivery up to 100 miles from our dealership...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GTHK23U96F270597
Stock: AU3804
Certified Pre-Owned: No
Listed since: 05-22-2025
Vehicle overview
GMC's modern full-size pickup has been around in one form or another since the early '60s. Now into its sixth generation, the Sierra, as it's now called, boasts classic styling and a wide variety of body styles and drivetrains. A perennial competitor to the full-size offerings from Ford and Dodge, GMC positions itself as the professional grade truck in GM's lineup. Although its sales numbers are far below those of its competitors, when combined with its sister vehicle, the Chevrolet Silverado, the GM trucks sell in competitive numbers to Ford's F-Series.
Often first to market with exclusive features, the Sierra 2500HD continues that tradition by offering XM Satellite Radio and Bose audio systems. GMC trucks also offer the OnStar communications system that provides the convenience of 24-hour on-call assistance for everything from tow truck requests to dinner reservations. Combine this with attractive styling on the outside and thoughtful features on the inside, and the Sierra 2500HD presents a compelling package for anyone in the market for a no-holds-barred work truck. Solid as the heavy-duty Sierra is, it's definitely worth your while to shop around in this segment, as Ford and Dodge both have strong diesel power plants that give their trucks higher tow ratings. GM's truck is still a fine choice for use around the worksite and home, especially if you decide you don't need the grunt of diesel -- just make sure you assess your needs carefully before making a decision.
Performance & mpg
The HD's base engine is a 6.0-liter V8 rated at 300 horsepower and 360 pound-feet of torque. GMC offers two even more powerful options: an 8.1-liter V8 and the 6.6-liter Duramax turbodiesel. The 8.1-liter engine boasts an impressive 330 hp and 450 lb-ft of torque, while the Duramax diesel makes as much as 360 hp and 650 lb-ft of torque. The standard transmission for the 6.0-liter V8 is a five-speed manual with a four-speed automatic optional. The 8.1-liter V8 and Duramax diesel can be hooked up to either a six-speed manual or a heavy-duty Allison six-speed automatic. Being heavy-duty trucks, these brutes can certainly pull -- the maximum towing capacity of the 2500HD with the 6.0-liter engine is 10,500 pounds, while the 8.1-liter V8 can tow up to 12,000 pounds.
Safety
Four-wheel antilock disc brakes are standard. In frontal crash tests conducted by the National Highway Traffic Safety Administration, a Sierra earned a three-star rating (out of five) for driver protection and four stars for the front passenger. In the Insurance Institute for Highway Safety's frontal offset crash test, the Sierra was given an overall rating of "Marginal," the second lowest.
Driving
The 2500HD is a reasonably comfortable truck for everyday use, but don't expect the plush ride of its light-duty siblings. Any of the available engines provide swift acceleration and ample towing power, but the Duramax diesel is probably the best choice for those who tow heavy loads. The manual transmissions are about what you would expect in a big truck, but the automatics shift smoothly and crisply no matter how heavy the load.
Interior
Inside, Sierra buyers will find a logically laid-out interior with an easy-to-use dual-zone climate control system and clear, uncluttered gauges. Materials quality is unimpressive, and build quality, though improved over the last few years, is still behind the competition. The large cabin offers plenty of room and comfortable bucket seats.
2006 GMC Sierra 2500HD models
The 2500HD is available in regular, extended and crew cab body styles in both two- and four-wheel drive. Short or long boxes are available except on regular cabs, which are long boxes only. There are several levels: Work Truck, SL1, SLE1, SLE2 and SLT. True to their name, Work Trucks offer only the basics, but you still get manual dual-zone air conditioning, a 40/20/40-split bench seat and ABS. SL1 models come standard with a tilt steering wheel, cruise control, an AM/FM/CD stereo, driver message center and tinted glass. SLE1 models add power windows and door locks, remote keyless entry, power-heated exterior mirrors, foglamps and a leather-wrapped steering wheel. SLE2 models provide a six-way power driver seat and an upgraded Bose stereo. Top-of-the-line SLTs add leather bucket seats with heaters, driver-seat memory and dual 10-way power adjustments, automatic climate control, power-retractable mirrors and satellite steering wheel controls.
Compare 2006 GMC Sierra 2500HD trim levels
Helpful trims summary and side-by-side comparison chart

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Cost to Drive
Monthly estimates based on costs in Arizona
Not EPA tested for Sierra 2500HD Work Truck
Sierra 2500HD Work Truck
vs
$228/mo
Avg. Large Truck
GMC Sierra 2500HD Owner Reviews
Most Helpful Owner Reviews
Trending topics
Great truck
4.25 out of 5 starsterry, 06/16/2010
2005 GMC Sierra 2500HD 4dr Extended Cab SLT 4WD SB (6.0L 8cyl 4A)
I purchased this truck in April 2010. My first gmc. I love it. It has the duramax & Allison combo. Very powerful. It pulls beyond what I expected. I got this truck used with 81 thousand miles. Everyone tells me its just getting broke in. So far I like everything about this truck.
05' 6.6 V8
5 out of 5 starstroyman89, 12/12/2008
2005 GMC Sierra 2500HD 4dr Crew Cab SLT Rwd SB (6.0L 8cyl 4A)
Very nice truck. Lots of power for pulling my 35 foot race trailer. Good on fuel about 21 highway 18 in town. I put the banks 6 gun chip in it. Very fast. Sounds good and has lots of power
The time tested truth
5 out of 5 starsdplind, 09/25/2010
2005 GMC Sierra 2500HD 4dr Extended Cab SLT 4WD SB (6.0L 8cyl 4A)
Ok let's start out that I have owned them all and I have owned a lot of trucks. My business is repairing trucks of all sizes and brands for large and small owners. I drive what I don't have to fix! Period! The GMC gives me power to pull my toy hauler and comfort on the long vacations. looks great and never lets me down
Excellent family recreation truck
4.88 out of 5 starsirideharley, 06/29/2009
2006 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD SB (6.0L 8cyl 4A)
Was considering the Dodge Cummins for it's tough reputation but couldn't swallow the tight back seat for a growing family. A friend had the Chevy Duramax and I haven't looked back since. The GMC Duramax and 6 speed Allison tranny are incredible. Quiet ride, plenty of room in the back seat, power a plenty to pull the bass boat with a camper on top. With or without a load, city and hgwy … driving we still average 18 mpg, and at least temporarily diesel is cheaper than unleaded in my neck of the woods. Absolutely no buyers remorse with this truck. Two thumbs up all around.
We have a limited number of reviews for the 2006 GMC Sierra 2500HD, so we've included reviews for other years of the Sierra 2500HD since its last redesign.
2006 Sierra 2500HD Highlights
Regular Cab
Work Truck
Base MSRP Excludes Destination Fee | $21,825 |
---|---|
Engine Type | Gas |
Seating | 3 seats |
rear wheel drive | |
Max Towing Capacity | 12,000 lbs. |
Warranty | 3 years / 36,000 miles |
Safety
Key safety features on the Sierra 2500HD include:
- Alarm
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