I have been receiving the -€œService Trailer Brake System-€ error intermittently. The only information I have been have to find around this is a defective wiring harnesses between two modules. This defect is not due to wear/tear and has been reported as a defective part on multiple GMC models. When this service error pops up it is distracting and very unsafe for driving as well as dangerous when towing as the driver has no idea of the trailer brake system is functioning properly..

- Belfast, ME, USA

At night, the back-up camera display on the dash is so bright, it lights up the whole cab and this causes the driver not to be able to see anything outside the cab or around the vehicle when reversing. I almost backed over my wife because I could not see her because of the brightness. There is no way to adjust the brightness when it is in reverse and in the dark you can not see much in the screen because of the brightness. I took it to the dealer and he said they have seen this problem on the full sized trucks but not the mid-sized and he said it was in working condition. I feel this is very dangerous if you can't see when you are reversing.

- San Antonio, TX, USA