My 2003 Z71 that I bought new has 220,000 on it now. The 'major' repairs I've had have been 2 cats on one side, 1 cat on the other, u-joints, an 02 sensor, and a rebuilt water pump.
My speakers could be replaced, I replaced the guage motors in the instrument panel for $5 each and a little soldering time, and a couple of the backlights are out on the air conditioner controls.
Other than that its all good, changed the oil usually somewhere between 3k and 5k miles and some other routine maintenance, but not as stringent as I should have been either.
