If you look at the sticker in your glove box and take a picture of it. Those are the RPO codes for your truck by gm. Then google 2012 GM RPO codes you can see all the options. Like heavy tow package and such. I have a 2012 Silverado and mine is 9500 lbs. But i got a lot of good info on what mine had. Like heavy duty cooling system and such. Made me feel a lot better when I bought my KZ TT. Also if you never used a weight dist hitch some great videos on you tube that make hooking it up so much easier.