Have a 22 ZR2. Bought a new camper, 5000lb 25' length. The integrated brake controller in these trucks do not function. After about 2 minutes the brake system disconnects. Displays a message to get service. Took it to dealer, code c159c. No fix yet, Chevy has been working on the problem for over 8 months. I don't feel safe pulling my camper. The brakes got extremely hot on my way home from the camper dealer. Drove about 50 miles. I wouldn't tow a trailer with this truck. Looking into the lemon law. Just a heads up.