This thing is a monster. 650+ HP @ 10psi on 93 octane. Can safely be turned up to 20psi or more, on race gas. 6.0 LS-1 with a 76mm turbo, built rite with all the best parts. Forged Diamond pistons, hellfire rings, ARP, ported 317 heads, SLP springs, retainers, locks and rocker upgrade. Big brakes, sway bars, shocks, intercooler, push button E-boost 2 controller, snow meth injection, 295-50-20 rubber all around. Arizona speed and marine turbo kit with real ceramic coated headers and 4" exhaust. @10 psi the motor snapped the input shaft of the Hughes built 4L60e. The truck now has a bulletproof 4L80e built by Sid Neal Racing Transmissions, good to 1500HP, and a 2800-3000 stall lockup triple disk PI converter. Transfer case is rebuild and good for 1000 HP. Trans and t-case have around 200 miles on them. Engine has around 5-10k on it. Truck has 134k. Loaded with every option in 2001, it was the most expensive 1/2 ton pickup you could buy! This GMC is basically a Cadillac pickup. I'm still not sure everything the 21 way power heated leather seats do. I have a book of receipts totaling around 100k on this truck. The truck was 50k in 2001 and all the upgrades are around 50k! This is an awesome truck for a great price! This is also listed on Craigslist Atlanta, with more pictures. Video coming soon.