Well let me piss on this parade....
I had a 2000 Z71 extended cab. My dad has a 2001 1ton Dually. My step dad....a 2001 Z71 extended cab....damn near the same truck as my 00.....same problems too.
Mine had 46K on it when I traded it this year for a 05 F150 SuperCrew(man do I love this truck).
Let me start by saying I'm picky about my trucks...well, dang near anything I own. Here is a list of what went wrong from when I bought it with 17K on it in mid 00.
Windshield seal replaced
Paint pealed off in one place and was repainted
stearing wheel started to feel slack....some plastic bushing was replaced
Tire cut at 25K and had to replace the whole lot.
Fuel pump $670 replaced at 45K
**&&^%$@@ squeaking noise from the rear suspension.......heard on every single Chevy of that generation I've ridden in.......never did get it fixed....they couldn't figure it out.
Cold Start knock(anytime it was under about 40 degrees F outside.....sounded like I owned a diesel.....it was the 5.3L.
Linkage to the gas pedal kept comeing loose and caused the pedal to stick for a second when trying to press on it.
Bad fan noise from clogged vents(this pissed me off, cause I'm a picky motherfucker and keep my trucks very, very clean.
What was nice on the truck....I liked the interiors...good seats
Milage I got about 19 with the AW tires, about 16-17 with the newer 8ply tires
Handled like a sportscar
Good power.
All that said, I was always a Chevy guy. I had my 90 extended cab for 10yrs and loved it. It was a fantastic truck. My last one will be my last Chevy. It sucked and it wasn't just that truck. All of the above trucks have shown similar problems.