For this month's Fantastic Four we've got a crew cab GMT900, the most popular cab configuration of the most popular fullsize truck on the market right now. If you've got a new Chevy or GMC, pay attention, because we did the hard work of finding parts that work together to make a great-looking, functional cruiser. On the performance front, we improved mileage, power, and sound thanks to K&N Filters and Heartthrob Exhaust. The tandem gave us a 22-RWHP boost in power and improved the Sierra's throttle response. We decided to trust the handling of a tuned Belltech suspension that will allow for a customizable ride height. Using an adjustable mounting point at the shackle and spacers in the sport-tuned coilover shock in the front, we can dial-in the suspension in exactly how we like it. Combined with the 2-inch drop spindle we'll have a range of 1-4 inches of drop. and unlike many lowering kits where the ride suffers, this kit was specifically engineered to provide improved handling and comfort. We haven't forgotten that we want this truck to look its best, so Elite wheels, General Tires, and T-Rex grilles were all called upon to make sure this truck ups the ante on all fronts with color-matched style. Check out how our neighborhood 4 Wheel Parts install tech, Jason Green, transformed the ride and handling of this Sierra before we upped the looks and performance at our very own Tech Center.

FROM THE DRIVER SEAT
Once the GMC Sierra was aligned to correct the toe-out the spindles added, it drove perfectly. The owner is thrilled with the look of the Elite wheels and General tires, and the offset is dead-on. Ride quality is top-notch as well, with decent sidewalls to absorb SoCal potholes. The sound of the 4.8L was also much improved, we'll get mileage numbers as soon as the owner gets a tankfull through the truck.

YOUR QUESTIONS ANSWERED

Time Spent Working: Approximately 8 hours
Degree of Difficulty: Moderate
(Removing spring hangers is a pain but not impossibly for DIY installs, but the coilover assembly needs specialized tools)

Parts Used:
Belltech 641SP lowering Kit $1,022.00
Elite Phase 6 machined black 22x9.5-inch wheels $285.75 (each)
General Grabber UHP 305/40R22 tires $189.95 (each)
Heartthrob 2005805 single exit exhaust $358.95
K&N AirCharger 63-3070 intake kit $356.79
T-Rex Upper Class mesh main grille 51205 $375.95
T-Rex Upper Class mesh bumper grille 52205 $235.95

Total: $4,252.44
(Prices from 4wheelparts.com and autoanything.com, does not including tax or labor)

SOURCE
T-Rex Grilles
2365 Rail Road
Corona
CA  92880
800-287-5900
www.trexbillet.com
Belltech Sport Trucks
1075 North Avenue
Sanger
CA  93657
800-445-3767
www.belltech-sport-trucks.com
K&N Engineering
1455 Citrus Street
Riverside
CA  92507
800-858-3333
www.knfilters.com
4Wheel Parts Performance Center
809 S. Grand Avenue
Santa Ana
CA  92705
714-542-9800
www.4wheelparts.com
MHT Luxury Wheels
12300 Industry Street
Garden Grove
CA  92841
800-493-7891
www.mhtwheels.com
Heartthrob Exhaust Accessories
60819 U.S. Hwy. 12 West
Litchfield
MN  55355
320-693-0222
www.heartthrobexhaust.com
General Tire
1800 Continental Drive
Charlotte
NC  28288
800-847-3349
www.generaltire.com
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