Photo 1/12 | 2004 Gmc Sierra Front Three Quarter | 2004 gmc sierra front three quarter
Photo 2/12 | 2004 Gmc Sierra Front Three Quarter | 2004 gmc sierra front three quarter
Photo 3/12 | 2004 Gmc Sierra Rear Three Quarter | 2004 gmc sierra rear three quarter
Photo 4/12 | Lb7 Duramax Engine | Steven O’Brien’s LB7 Duramax was put together by Fleece Performance from the ground up and features many of the industry’s best hard parts. Billet main caps, Carrillo rods, and Mahle Motorsports pistons fortify the short-block, while SoCal Diesel’s 3388 cam and Stage 2 heads greatly improve driveability and airflow.
Photo 5/12 | Borgwarner S400 Turbo | Based off a BorgWarner S400 frame turbo, Fleece Performance’s S468 Billet Cheetah features a billet-aluminum 68mm compressor wheel. A 78mm turbine wheel yields the kind of flow needed to make big horsepower, and a relatively tight .90 A/R turbine housing helps keep low-rpm response quick.
Photo 6/12 | Traction Bars | Making the Sierra driveable while in two-wheel drive is a set of traction bars. A welding and fabrication friend of Steven’s built the bars, as well as the axle and frame mounts.
Photo 7/12 | Twin Cp3 Kit | A twin CP3 kit from ATS Diesel utilizes two stock-displacement LBZ Duramax pumps to feed the rail, and ultimately the Exergy Engineering 100- percent-over injectors. The CP3s receive their fuel supply from a 165-gph AirDog II system.
Photo 8/12 | Fuel Throttle Wheels | Cooper Zeon LTZs measuring 305/50R20 rest on a set of 20x10-inch Fuel Throttle wheels.
Photo 9/12 | Autometer Gauges | Auto Meter Sport-Comp boost and pyrometer gauges are mounted in an overhead console pod for a nice, uncluttered interior look. On the street, boost peaks at 55 psi and EGT rarely creeps past 1,500 degrees.
Photo 10/12 | Rear Aam 1150 | To strengthen the rear AAM 1150 axle, a Grizzly locker was installed along with Yukon’s 38-spline chromoly axleshafts. The GMC’s IFS was upgraded with Fleece Performance tie-rod sleeves and pitman and idler arm braces from Cognito Motorsports. A 5100 series Bilstein shock at each corner gives the truck a plush ride.
Photo 11/12 | Dvd Headrests | All seats are wrapped in Katzkin leather, and Audiovox monitors (with built-in DVD players) are built into both the driver and passenger seat headrests.
Photo 12/12 | 2004 Gmc Sierra Burnout | Since this beast makes a little more than 900 hp and 1,600 lb-ft of torque on the chassis dyno, you can see why it’s easy to light up the rear tires. We believe Steven when he tells us his GMC is a handful on the street.