I have a 2018 GMC Sierra Duramax Quad-Cab and when it is connected to either my boat, stock trailer, or cargo trailer the lights and electric trailer brakes on the trailers do not work. and the chime from the "Service Trailer Brake" indicator sounds and doesn't stop until I unplug my trailer harness from my truck making it a distraction and an unsafe situation when trying to navigate through traffic(changing lanes, stopping, and other functions needed when hauling trailers). The dealership said it was a module and specified which one and so I elected to replace it myself and it wasn't the issue. I choose to do the work myself as they quoted me a price of $700+ to repair the problem.

- Star, ID, USA

Water leak, known in other years of the same model vehicle, caused the rear defrost to fail and smoke when in operation nearly causing a fire in the vehicle as it was being operated.

- Ravensdale, WA, USA

Diesel exhaust fluid systems limited to slower speeds causing traffic back up. Issue is these components are failing on these trucks. Mine failed with in 3 yrs of manufacture date.

- Baker, FL, USA

Rear camera only works intermittently and never early mornings when truck is put in reverse. A blue screen comes up with 'service back up camera ' on screen.

- San Pedro, CA, USA