Bought this in fall of 2007 with 60 thousand miles. Pumped a lot more money into it than I thought I would have to, to start out. Wheel hub bearings on both sides. Tie Rod ends. Ball joints. Air conditioner blower motor. u joints. Overhauled front brakes and rotors. This was over a course over 60 thousand more miles I have pumped into it. 122k on it now. I really do like this truck though, I do not pull very much and I love the feel behind the wheel. If it was 4x4 it would be perfect, but its very dependable and hasn't ever broken down on me on the road. I'm hoping to get several more miles out of it. Only problem now, the wheels never stay in balance or alignment and I never offroad it.
The power and acceleration are unbelievable. Handling is very good for a pickup. I only have 1000 miles on it so far, but very satisfied overall. I previously had an '01 Tahoe with the 5.3 engine, and the Sierra Denali with the 6.0 is getting slightly better mileage (if I keep a light foot on the gas). For some reason I could never average better than 13.5 with the Tahoe around town, and am getting just under 14 with the Sierra. I think the ethanol fuels around here are partly to blame for lower mileage. The tonneau cover that came with the truck is OK, but I think an Access brand cover would be better - easier to roll up than the GMC model. The all wheel drive is very smooth.
I bought this truck new in 2005, have put 67k miles on it in 5 years. This is a very comfortable truck. I took it on many 300 mile trips without a rest stop, feeling like I had only driven to town. However the many electrical problems has me wondering about the quality of gmc. Less than 5k the instrument display showed "electrical malfunction". The dealership repaired and did not give me reason. Other problems are evap solenoid, power door lock, brake master cylinder, bumping in steering column, 4wd transfer case switch, speedometer would go to 0, seat heater shorted out, headlights and dash lights flicker anytime you hit brakes or use Windows. The dealer gave an extra 2 yr warr for free due to the issues
Bought truck new and totally disappointed. Truck now has over 104k miles and here is list of repair. Passenger hub replaced under warranty and driver hub replaced at 76k. Trans rebuild 75k. Torque converter replaced @ 83k. Power steering has been terrible since 30k. Front diff passenger seal leaks since under warranty and driver front diff seal leaked at 101k. Now water pump gasket leak @ 103k. U-joint at T-case & drive shaft replaced at 86k. Interior makes noises and this is considered normal. Noisy cab when cruising at over 45 miles. Rust is everywhere on the chassis. My last GM light duty truck
I started with a 99 Chevy Z71 that I drove 200k miles and beyond it's last leg so I traded it in for this GMC Crew 2WD with the 5.3 L. I was disappointed with the extended travel in the front suspension and huge turn radius. It's great on long trips for comfort, but gas mileage averages around 14 in the city and 16 on the highway. It feels real solid until you tow ANYTHING more than 500 #'s, it struggles over 55 mph with shifting a lot, due to lack of torque. The steering pops and clunks like my 99' did, the same for the rear-end chirp on start/stops. Bad design still being used from 99, that's just annoying. I like the comfort and prefer cloth over leather on long trips and in hot Texas.