I've got a 2004 Suburban with same motor. What kind of mileage. Tranny needed rebuild at about 150k. Otherwise only brakes, U-joints, front wheel bearings and a couple of sensors. Oh yeah, and 4 power window motors, and every moving part in the front end. Make sure you can lower the spare tire, they get stuck. Some 5.3's with the Cast-tech had a problem with coolant leaks under the valve covers. Seems like there's always something to fix but I still like the truck.
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