The '99-to-present GMC and Chevy 3/4-ton trucks are two of the most popular fullsizes ever to spring from the General Motors lineup. While the trucks' peppy Duramax diesel engines and bulletproof Allison transmissions really get them moving, the low factory ride height can sometimes blur the line between a heavy-duty truck and an overgrown car. With the aftermarket full of suspension kits for the 3/4-ton HDs, it can be a little over-whelming to narrow your lift options down to one. For us, the price, quality of parts, and ease of installation are major factors when looking into a suspension kit. So when the time came to give our '04 Chevy 2500 HD 4x4 a little boost, we set our sights on the new 6-inch suspension system from Pro Comp.
The completely redesigned '99-'09 GM 3/4-ton 6-inch kit nets the latest technology in IFS suspension lifts. The new knuckle-style kit allows the installer to lift the truck without relocating the upper control arm and provides a minimal front track-width increase.
Among the kit's highlights is its complete compatibility for late model GMs equipped with StabiliTrack. This means no annoying dash lights or beeping from the truck's taller stance.
To install the Pro Comp 6-inch we went to the pros at 4Wheel Parts in Thousand Oaks, California. With all our parts waiting for us at the store, we rolled in with a bone-stock '04 Chevy 2500 in the a.m., and by day's end we had our HD lifted, aligned, and ready to hit the town and the trail.
1. To clear the new subframe assembly, we trimmed out a small section of the original IFS
2. With the front differential's upper mounting tab removed, we bolted on the differential
3. The heart of the new 6-inch kit is the new knuckles, which are designed to raise the fr
4. After drilling a few holes in the 3/4-ton's frame, we mounted up the CNC-cut, powdercoa
5. A mild block, U-bolts, and bumpstop spacers comprise the rear suspension lift and bolt
6. For tires and wheels we went with a 35x12.50 Pro Comp Xtereme All Terrain mounted on a
Ride & Drive
The on-road handing and ride quality of the HD is smooth, and tire noise is practically nonexistent. Off highway the truck performs well and works excellently for cruising around the desert or hauling the off-road toys over the terra. Overall, we like the fresh look and feel of the bigger bow-tire. The ride height of the quad cab is tall enough to give the truck an impressive stance, but still low enough to retain its function as a workhorse and daily driver.
Pro Comp Suspensions, Inc.
2360 Boswell Road
400 W. Artesia Boulevard