Thanks for all the replies. I wasn't trying to be negative, just wondering if truck had any issues I needed to keep an eye on, like the rear window leak problem. Truck should be here by Friday, can't wait!
Just bought a AT4 Sierra with all the bells and whistles, 5.3 engine. Will be here by the weekend. Want to know from other owners what positive or negative experiences have you had with this truck? My first GMC in 32 years. LMK and don't be shy. Thanks.