2011 GMC Sierra 2500HD - Dirty D

Anything and Everything

Tom Valente
Jan 1, 2013
Photographers: Bob Carpenter
When Bruce Stafford of Colorado Springs, Colorado, decided to build a truck that was like nothing else around his hometown, he knew he had his work cut out for him. The truck had to look good, have lots of power, and be able to work hard without fear of breaking.
Photo 2/12   |   Sitting on a hill in Golden, Colorado, with the Coors plant in the background turned out to be a perfect setting for this tough truck.
Let’s start with the powerplant of this ’11 GMC 2500HD. Bruce estimates that the 6.6L diesel engine puts out about 600 hp and 1,200 lb-ft of torque. How? Well, there’s the stock VGT turbo paired with a BorgWarner 5474—Bruce is sure this is the first-ever twin-turbo LML Duramax on the street. The 20-percent Industrial Injection nozzles add to the power boost, as does the H&S Mini Maxx, and even more products. A Snow Performance MPG-Max was installed, along with an ATS Co-Pilot. A FASS Titanium series 220-gph fuel/air separation system keeps the fuel spotlessly clean. ARP 625 head studs keep the engine together.
Photo 3/12   |   1301 8l 04 Dirty D Custom Overflow Tank
All this power requires a strong transmission, and Bruce was lucky to have ATS practically in his backyard, so he became a regular visitor and learned everything he could. Eventually, the truck ended up with an ATS billet Allison transmission with ATS Five Star torque converter and ATS billet flexplate. A FloPro 5-inch stainless turbo-back with a 6-inch black chrome tip gets all the exhaust gases out of the engine.
Photo 4/12   |   Bruce Stafford’s ’11 GMC 2500HD is just about right in every regard. Alligator Diesel Performance supplied the Snow Performance water-meth kit, the intercooler pipes, and the traction bars. We watched Bruce hook up and pull a sled at the ATS Diesels on the Mountain event.
Bruce also knew from the start that the truck would have to be lifted, so he picked up a 7-inch Skyjacker kit and added T-Rex traction bars and Fabtech HD tire rods. Rocky Mountain Driveline custom-built the driveshafts. Pro Comp supplied both the wheels and tires. The Xtreme All-Terrain tires are 37 inches in diameter.
Photo 8/12   |   Pulling onto the scales at a local sled pull is not an uncommon sight for this truck. Bruce doesn’t baby the GMC.
Tough bumpers were a necessity, and Bruce went with the Iron Cross Automotive offerings, as they look great, fit perfectly, and are tough as anything available on the market.
Photo 9/12   |   1301 8l 05 Dirty D Custom Entry Step
A lot of work went into this pickup, and Bruce is rightfully proud of it. The truck even has its own Facebook page (www.Facebook.com/DirtyDDiesel).

2015 GMC Sierra 2500HD Specifications

Fair Market Price $31,532
MSRP $33,545
Editors' Overall Rating
Mileage N/A City / N/A Highway
Engine 6.0L V8
Horse Power 360 hp @ 5,400 rpm
Torque 380 ft lb of torque @ 4,200 rpm
See all Specifications


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GMC Sierra 2500HD

Fair Market Price
Editors' Overall Rating
Basic Specifications
MSRP: $33,545
Mileage: N/A
Engine: 6.0L V8
Key Competitors
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