My truck is my baby. It's ready for a night on the town or to help a friend move. It's never let me down and I feel safe and comfortable driving in rain or snow. The auto 4 wheel drive function is what gives me this feeling. 47000 trouble free miles and counting. My second Silverado and I will have it for the next 5 years at least.
OnStar is great. I love the ride, this thing holds the road and doesn't bounce around like other makes 4x4s. It really gives you a feel of control yet seems to drive itself. Seats are very comfortable and the leather is of "truck" quality which means it holds up well to wear and tear.
Locking tailgate. Get with the times and go with LED tail lights. Go back to the locking center console and glove box. Larger stock rims and tires. I suggest 17 to 18 with at least 265 tires instead of 245.