End of year clearance when I bought it. I got a good deal. I use it for work and hauling a 5th wheel camper. You hardly know you have the camper behind it. It is a pleasure to drive and with nearly 90k miles it is rattle free and quiet. The long bed makes towing a pleasure. The 4 wheel disks brakes are3 greatpaired with the ABS, I still have more than half the pads left, my other car is a Ford ambulance, I'll take the GMC any day over the Ford, Dodge is noisy and only has short beds with the crew cab. I'm planing on a new GMC soon with a few more bells and whistles.
The steady ride I get with the long bed and the Duramax diesel that starts in the coldest weather. That seems to be just braking in now. And did I say it was quiet?
The same as all trucks, better fuel economy. I would like to see the fuel filter more accessible, I'm sure there is more but I can't think of them now.