Overall I've been fairly easy on this truck but occasionally have hauled very heavy loads. No problems. The smooth ride was a surprise to me. Engine performance is great. Milage is ok if you take it easy, otherwise it uses quite a bit. I think the interior is nice (despite what Edmond's say). It's a nice riding/functional truck. Can't find anything wrong with this truck yet (in almost 2 years).
My name is Brad and I have owned a 2001 GMC Sierra for a little over a year. The factory warranty has not expired and I have had to take it back to the dealership at least six times. From the seams on the interior ripping to the oxygen sensor going bad twice, this truck has been a real headache. I have the Z71 model and it is the truck I always wanted but after this one I am done with GMC.
At 900 mi It was in the shop for clunk/bang/vibration in the drive train. . after several annoying/time consuming attempts. GM bulletin (drive line clunk)#99-04- 02-002A. Not to be confused with the engine clunk/piston slap bul. This truck acts and sounds like the 1996 I sold prior. with 150,000 hard miles. I'm finding out that there are many bulletins and dissatisfied customers with several of the 00/01/02 model yrs. It now has 10000 mi and I'm sorry I ever bought it!!!