Although I have had this truck a short while, I have had absolutely no problems with it.
The Sierra is a very comfortable truck. I recently took it on a 600 mile trip, with new tires on it. It rode like a dream.
The interior is car-like, with very comfortable seats. The lumbar supports help with long trips.
The Sierra handles very nicely on the rode and in town.
The 4.8 liter Vortec has plenty of power. I made 20 mpg on the recent trip on Interstate highways and two lane highways.
We'll wait and see what you say 3 years from now when you have part ownership of the GMC dealership.