Not very much outside normal wear & tear... tires, brakes (rotors too), alternators... hmmmmm, 3 of these, luckily I bought the first with a *lifetime* warranty.
For a domestic mid size car, I was quite surprised at the available room.
The ride is a little on the stiff side (it does have the heavy duty suspension).
It has been extremely reliable (starts every morning) and another suprise is the highway fuel mileage (@ 28-31mpgs).
If you need decent transmission and can't afford the best car (a Camry), you would do very well with a 6000. Similar cars are Cutlass Ciera and Buick Century (note the Olds and Buick are for the older crowd, but are essentially the same car).
Hey man, Don't forget the Chevy Celebrity. The Celeb is another one of GM's awesome A-body cars. Celeb's, 6000's, Ciera's, and Centurys. I love 'em all.
Yeah, but the 6000 has the sleek and flamboyant styling that blows all of those other A-body vehicles away. When you see the smooth contours, supplemented by the vigorous lines of the P-6000 prowling down the street, you know you are viewing a fine vehicle. The other models all look cheap in the current milieu, but the P-6000 looks like it just rolled off the assembly line, next to whatever other vehicles GM is squirting out of its factories.