We purchased this 2009 GMC Sierra 2500 HD on 4-25-09.

Final stats:

Mileage: 5029

Number of days out of service: 34

Number of times in a dealers shop: 11

Number of dealers who worked on the truck: 4

Number of times the C0050 code was diagnosed by OnStar: 10

Date that GM finally did a buyback on this truck: 11-10-09

The experience that I had with GM customer service while trying to get the problems with this truck resolved has left me with no desire to ever purchase another GM product.