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Replacement RC54820001 Fog Light Switch - Direct Fit, Sold individually
Vehicle Info Required to Guarantee Fit
$22.31
Vehicle Fitment
  • 2003 - 2006 GMC Sierra 2500 HD All Submodels All Engines
Product Details
Notes : Blade type; 6-prong male terminalWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Sold individually
Direct Fit Horn - High Tone
Replacement
Part Number: REPC502504
Vehicle Info Required to Guarantee Fit
$16.44
Vehicle Fitment
  • 2001 GMC Sierra 2500 HD SL 8 Cyl 6.0L
  • 2001 GMC Sierra 2500 HD SL 8 Cyl 6.6L
  • 2001 GMC Sierra 2500 HD SL 8 Cyl 8.1L
  • 2001 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2001 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2001 GMC Sierra 2500 HD SLE 8 Cyl 8.1L
  • 2001 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2001 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2001 GMC Sierra 2500 HD SLT 8 Cyl 8.1L
Product Details
Notes : High Tone, With Mounting Bracket, 2 Male Blade TerminalQuantity Sold : Sold individuallyWarranty : 1-year unlimited-mileage warranty
Direct Fit Horn - Low Tone
Replacement
Part Number: REPC502505
Vehicle Info Required to Guarantee Fit
$13.50
Vehicle Fitment
  • 2001 GMC Sierra 2500 HD SL 8 Cyl 6.0L
  • 2001 GMC Sierra 2500 HD SL 8 Cyl 6.6L
  • 2001 GMC Sierra 2500 HD SL 8 Cyl 8.1L
  • 2001 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2001 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2001 GMC Sierra 2500 HD SLE 8 Cyl 8.1L
  • 2001 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2001 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2001 GMC Sierra 2500 HD SLT 8 Cyl 8.1L
Product Details
Notes : Low ToneQuantity Sold : Sold individuallyWarranty : 1-year unlimited-mileage warranty
Direct Fit Horn - Tone
Replacement
Part Number: SET-REPC502504-2
Vehicle Info Required to Guarantee Fit
$28.44
Vehicle Fitment
  • 2001 GMC Sierra 2500 HD SL 8 Cyl 6.0L
  • 2001 GMC Sierra 2500 HD SL 8 Cyl 6.6L
  • 2001 GMC Sierra 2500 HD SL 8 Cyl 8.1L
  • 2001 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2001 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2001 GMC Sierra 2500 HD SLE 8 Cyl 8.1L
  • 2001 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2001 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2001 GMC Sierra 2500 HD SLT 8 Cyl 8.1L
Product Details
Components : (2) HornsQuantity Sold : Set of 2Warranty : 1-year unlimited-mileage warranty
Replacement Horn, Low note - Direct Fit
Replacement
Part Number: REPC502501
Vehicle Info Required to Guarantee Fit
$23.58
Vehicle Fitment
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 8.1L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 8.1L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 6.6L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 8.1L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.6L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 8.1L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 6.0L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 6.6L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 8.1L
Product Details
Location : Driver SideNotes : With plug-in type connector; May require GM OE # 19116451 Horn Wire on some applicationsQuantity Sold : Sold individuallyWarranty : 1-year unlimited-mileage warranty
Direct Fit Horn - High Tone
Replacement
Part Number: REPC502502
Vehicle Info Required to Guarantee Fit
$14.46
Vehicle Fitment
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 8.1L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 8.1L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 6.6L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 8.1L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.6L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 8.1L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 6.0L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 6.6L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 8.1L
Product Details
Location : Passenger SideQuantity Sold : KitWarranty : 1-year unlimited-mileage warranty
Direct Fit Horn - Tone
Replacement
Part Number: SET-REPC502502-2
Vehicle Info Required to Guarantee Fit
$36.14
Vehicle Fitment
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 8.1L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 8.1L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 6.6L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 8.1L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.6L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 8.1L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 6.0L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 6.6L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 8.1L
Product Details
Location : Driver And Passenger SideComponents : (2) HornsQuantity Sold : Set of 2Warranty : 1-year unlimited-mileage warranty
Motor Mount
Replacement
Part Number: REPC311520
Vehicle Info Required to Guarantee Fit
$37.96
Vehicle Fitment
  • 2007 - 2009 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2007 - 2009 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2007 - 2009 GMC Sierra 2500 HD WT 8 Cyl 6.0L
Product Details
Location : Front, Driver Or Passenger SideNotes : With bracketReplaces OE Number : 15854941Quantity Sold : Sold individuallyWarranty : 1-year unlimited-mileage warranty
Motor Mount - Front, Driver and Passenger Side
Replacement
Part Number: SET-REPC311520-2
Vehicle Info Required to Guarantee Fit
$72.13
Vehicle Fitment
  • 2007 - 2009 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2007 - 2009 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2007 - 2009 GMC Sierra 2500 HD WT 8 Cyl 6.0L
Product Details
Location : Front, Driver And Passenger SideReplaces OE Number : 15854941Components : (2) Motor MountsQuantity Sold : Set of 2Warranty : 1-year unlimited-mileage warranty
Replacement REPG541301 Parking Assist Sensor - Direct Fit, Sold individually
Vehicle Info Required to Guarantee Fit
$15.31
Vehicle Fitment
  • 2007 - 2011 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2007 - 2011 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2007 - 2011 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2007 - 2011 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2007 - 2011 GMC Sierra 2500 HD WT 8 Cyl 6.0L
  • 2007 - 2011 GMC Sierra 2500 HD WT 8 Cyl 6.6L
  • 2011 GMC Sierra 2500 HD Denali 8 Cyl 6.0L
  • 2011 GMC Sierra 2500 HD Denali 8 Cyl 6.6L
Product Details
Location : RearNotes : Blade type; 3-prong male terminalWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Replacement SET-REPG541301-2 Parking Assist Sensor - Direct Fit, Set of 2
Vehicle Info Required to Guarantee Fit
$29.09
Vehicle Fitment
  • 2007 - 2011 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2007 - 2011 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2007 - 2011 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2007 - 2011 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2007 - 2011 GMC Sierra 2500 HD WT 8 Cyl 6.0L
  • 2007 - 2011 GMC Sierra 2500 HD WT 8 Cyl 6.6L
  • 2011 GMC Sierra 2500 HD Denali 8 Cyl 6.0L
  • 2011 GMC Sierra 2500 HD Denali 8 Cyl 6.6L
Product Details
Location : Rear, Driver And Passenger SideNotes : Pin type; 3-prong male terminalComponents : (2) Parking Assist SensorsWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Set of 2Prop 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Replacement SET-REPG541301-4 Parking Assist Sensor - Direct Fit, Set of 4
Vehicle Info Required to Guarantee Fit
$58.18
Vehicle Fitment
  • 2007 - 2011 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2007 - 2011 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2007 - 2011 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2007 - 2011 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2007 - 2011 GMC Sierra 2500 HD WT 8 Cyl 6.0L
  • 2007 - 2011 GMC Sierra 2500 HD WT 8 Cyl 6.6L
  • 2011 GMC Sierra 2500 HD Denali 8 Cyl 6.0L
  • 2011 GMC Sierra 2500 HD Denali 8 Cyl 6.6L
Product Details
Location : RearNotes : Blade type; 3-prong male terminalComponents : (4) Parking Assist SensorsWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Set of 4Prop 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Replacement RC32170001 Valve Lifter - Direct Fit, Set of 8
Vehicle Info Required to Guarantee Fit
$57.51
Vehicle Fitment
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 6.0L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 6.0L
Product Details
Warranty : 1-year unlimited-mileage warrantyQuantity Sold : Set of 8
Replacement SET-RC32170001-2 Valve Lifter - Direct Fit, Set of 2
Vehicle Info Required to Guarantee Fit
$109.27
Vehicle Fitment
  • 2001 - 2006 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2001 - 2006 GMC Sierra 2500 HD SL 8 Cyl 6.0L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2003 - 2006 GMC Sierra 2500 HD WT 8 Cyl 6.0L
Product Details
Components : (16) Valve LiftersWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Set of 2
Automatic Transmission Solenoid
Replacement
Part Number: REPC320703
Vehicle Info Required to Guarantee Fit
$11.58
Vehicle Fitment
  • 2001 - 2002 GMC Sierra 2500 HD SL 8 Cyl 6.0L
  • 2001 - 2002 GMC Sierra 2500 HD SL 8 Cyl 6.6L
  • 2001 - 2002 GMC Sierra 2500 HD SL 8 Cyl 8.1L
  • 2001 - 2005 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
  • 2001 - 2005 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2001 - 2005 GMC Sierra 2500 HD SLE 8 Cyl 8.1L
  • 2001 - 2005 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2001 - 2005 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2001 - 2005 GMC Sierra 2500 HD SLT 8 Cyl 8.1L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 6.6L
  • 2002 - 2005 GMC Sierra 2500 HD Base 8 Cyl 8.1L
  • 2003 - 2005 GMC Sierra 2500 HD WT 8 Cyl 6.0L
  • 2003 - 2005 GMC Sierra 2500 HD WT 8 Cyl 6.6L
  • 2003 - 2005 GMC Sierra 2500 HD WT 8 Cyl 8.1L
Product Details
Notes : With 4L60E TransmissionReplaces OE Number : 10478120, 10478131, 24230298Quantity Sold : Sold individuallyWarranty : 1-year unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Page 1 of 1278 | Showing 1 - 15 of 19169 results

GMC Sierra 2500 HD Customer Reviews

Fit and worked perfectly for my 2010 avalanche!
Brian Blocher
VERIFIED PURCHASER
Purchased on Jun 19, 2020
Direct Fit Horn - Low Tone
Jun 09, 2020
Great product
Great product but didn’t have directions one was a ground and one was to the horn was easy to figure out but would of been nice to have a card saying how to hook it up
Robert Robert
VERIFIED PURCHASER
Purchased on May 20, 2020
Replaced original horn perfectly
Gary Bufe
VERIFIED PURCHASER
Purchased on May 09, 2020

GMC Sierra 2500 HD Guides

Take Note of the Usual Problems of the GMC Sierra 2500 HD

The GMC Sierra 2500 HD may be a heavy-duty truck, but that doesn't excuse it from having problems that give drivers a hard time. Here are some of the common problems that truck owners should know so they won't be surprised should they experience these.

Muffler

One of the common problems this GMC truck experiences is the rattling or popping noise that comes from right under the vehicle. With such case, the driver may automatically think that his muffler may have already blown, but a careful inspection would show that the noise actually comes from the muffler heat shield. This problem begins when the muffler heat shield becomes loose. So if you step on the gas and accelerate, the heat shield will create more noise. Making sure that it's properly attached to the muffler should easily solve this problem. In fact, General Motors offers a kit to properly correct it.

Hydro-boost relief valve

Owners of the Sierra 2500 HD may have a hard time stopping the truck, especially if they're driving at high speeds. This can be attributed to the malfunctioning hydro-boost relief valve, which may not have been compatible with the model when they rolled off the factory. As a result, the seal of the valve cracks. And if the hydro-boost system doesn't perform its function properly, drivers will have troubles on the road and get themselves in an accident. That's why in 2004, the National Highway Traffic Safety Administration ordered General Motors to recall the 2003 and 2004 models to have their faulty hydro-boost relief valve replaced. This recall potentially affects about 69,000 units.

Instrument panel cluster

Many 2500 HD truck drivers have been complaining about the faulty indicators, gauges, and meters on their dashboard. Reports show that speedometers have been working erratically and fail to show the real speed they're moving at. Also, the fuel gauge shows a full tank, but then the needle would go halfway down. To make matters worse, the gear shift indicator on the panel doesn't light up, which leaves the drivers unaware of the gear their vehicles are in. But despite all the problems with the instrument panel cluster, only the faulty gear shift indicator was addressed by General Motors in 2005 when it recalled at least 7,000 units to reprogram the instrument panel cluster for free.

Two Most Common Gripes with the GMC Sierra 2500 HD

When Americans want a truck that they can count on, they turn to GMC. For many years, the all-American brand has been churning out some of the most reliable pickup trucks in the market. The GMC Sierra 2500 HD is the pick of the litter. Capable of being a reliable workhorse yet classy enough to be used as a personal ride, it's easy to see why the 2500 HD is a top performer. With so many years of manufacturing experience behind it, it's really hard to find fault with the 2500 HD. Still, no ride is ever truly perfect, so we brought together the two most common complaint people have had with the truck to make sure you are well-informed.


Inaccurate and faulty instrument panel

This problem was observed with the 2004 edition of the GMC Sierra 2500 HD. Most of the time, the problem lies with inaccurate readings given by the gauges on the instrument panel. In the very worst cases, the gauges on the instrument panel fail to work at all. While it is more an annoyance than a danger so far, the lack of knowledge on the states of the engine could lead to problems in the long run.


The quickest solution is to have the wiring in the instrument panel checked as this often fixes the problem up completely. No recalls have been issued for the problem as it is actually very rare. Some dealers are willing to fix the problem if your truck is still under warranty.


Excessive oil consumption

Affecting the 2002 release of the GMC Sierra 2500 HD, this problem is proving to be both costly and dangerous. It is costly because it necessitate constant refilling of the oil, and dangerous because it could cause trouble for the engine when left unchecked. Most have found the fault to lie in the engine itself-specifically with the pistons.


Again, no recall orders were issued. However, GM honors the 150,000-mile warranty on its trucks, and gladly takes care of the necessary repairs to make the problem go away.

FAQs—GMC Sierra 2500 HD

The speedometer and other instrument panel gauge on my GMC Sierra 2500 HD works erratically. Sometimes both the tachometer and speedometer would stay dead for days. Other times, the oil gauge would be acting up. Any tips?

There have been a lot of problems arising from GMC Sierra 2500HD speedometer acting up. GM actually already issued a recall for some and extended the warranty on some units to 7 years or 70,000 miles. It is recommended that you remove the entire instrument panel and send it to your trusted repair technicians to correct the fault.

If you want to check the problem yourself, the first thing to do is diagnose what's really causing the erratic behavior of your speedometer. Examine it for any signs of broken gears as this is the most common cause of speedometer problems. If this is the case, you will need to replace the broken gear mechanism.

Why does my GMC Sierra 2500 HD's daytime running lights keep on burning out?

There have been a lot of complaints about the bulbs on the Sierra's DLR being prone to burning out. It could be because of the high voltage running through the electrical equipment on your truck. The high voltage causes the DRLs to run hotter, thus burning them out quickly. GM recommends that you use the correct replacement bulb for longer life.

Whenever I turn on the A/C of my GMC Sierra 2500 HD, I notice that the driver's side gets too hot instead of cool - and it would happen at intermittent times. Any idea what I'm up against?

One of the common problems of the Sierra, along with other GM trucks, is erratic vehicle temperature control caused by failed actuators. If you're lucky, resetting the actuators can get the job done. You can look for GM-recommended reset procedures for actuators online. It's a simple HVAC system recalibration. If that did not do the trick, then you might need to replace the actuators or have them serviced in your next maintenance schedule.

I am having major issues with my GMC Sierra 2500 HD's windshield wipers. Sometimes the wiper blades are too slow and sometimes it doesn't move at all even when it's set at the highest setting. What seems to be the problem here?

The first thing to check when you experience this problem is the fuse. It could be just a simple case of blown fuse on your GMC Sierra 2500 HD. However, this could just lead to bigger problems since fuses usually don't just blow off on their own. Blown fuse could mean you have a shorted wiper-motor problem or faulty wirings in the harness between the switch and the motor. If it's not because of a blown fuse, your windshield wiper problems could be caused by lack of lubrication or corrosion in the gearbox. You should also check that your wiper blades are not bent.

I have no idea why but my GMC Sierra 2500 HD's braking system acted up a few days ago. The parking brake does not hold. Is there any adjustment I can make?

The usual cause of a parking brake or emergency brake that does not hold is improper rear brake adjustments. Your GMC Sierra 2500 HD could be using a self adjusting rear brake system just like many vehicles. In this case, the self adjusters in the system re-tension the rear brakes when you engaged the parking brake. When you don't use your parking brakes frequently especially if your truck is equipped with a manual transmission, it will wear and result in excessive distance between the rear friction material and the brake drum or rotor. This distance prevents the friction material from tightly contacting the rotor or drum when you apply the parking brake.

Try to apply and release the parking brake a few times to activate the self adjusters. You can also try to apply the brakes abruptly while traveling in reverse at low speed. If none of these work, check your rear brakes or have a mechanic check it and adjust it manually.

A Look at the Brief History of the GMC Sierra 2500HD

Pickups were always the workhorses of the road, hauling gear and other materials through some of the toughest terrains. They were built large and were made to last. The GMC Sierra 2500HD is a testament to the robustness of these vehicles. The 2500HD is the heavy-duty variant of the Sierra 2500 light truck.

1999: Prior incarnation as the Sierra 2500

Before the Sierra 2500DH, there was only the Sierra 2500, a light-duty pickup truck meant for regular hauling jobs and for driving through flat city streets. In 1999 and 2000, a heavy-duty version of the 2500 was introduced. The light duty was soon discontinued while the heavy-duty version would be offered alone as the new 2500HD.

2001: The first release of the Sierra 2500HD

The first 2500HD came equipped with a 6.0 liter V8 engine capable of producing 300 horsepower. It also came with either a standard five-speed manual transmission or an optional four-speed automatic transmission. Two other optional engines were offered as well: the 8.1 liter V8 gasoline engine capable of producing 340 horsepower and a 6.6 liter turbodiesel engine capable of producing 300 horsepower.

The powerful engines that came with the 2500HD are what made the pickup give such an impressive performance. The towing capability of the truck was phenomenal while the acceleration was much better than other trucks of the same category and weight class. There was a lot to be desired with the truck’s interior design but since it was designed mostly as a workhorse, there was little room left for aesthetic improvements.

2007: The Second generation

The Sierra 2500HD came in three body types: regular, extended and crew cab. The extended body type featured additional space behind the front seat for three more passengers. The rears doors were smaller than those in the front and the interior space in the back was mostly cramped. The crew cab type had an enlarged interior in the back providing a generous amount of space for passengers and four full sized doors for the truck. All 2500HD’s were powered by a 6.0 liter V8 engine that could produce 360 horsepower. A 6.6 liter Duramax turbodiesel V8 that could crank out 397 horsepower was offered as an optional engine. All trucks were fitted with a six-speed automatic transmission. The regular body type was available in two basic trims: the work truck and the SLE. The extended and crew cab body types had the two basic trims with the addition of the SLT and the Denali.

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