After 3 attempts to correct the brake problem by greiner GM. The last time I drove this truck the brakes locked up in the middle of the hwy for no reason truck was brought back to dealership where they have had GM specialist check it out and I have been told the truck is un repairable, I am seeking a buy back from GM as of 10/15/20 dealer info: Greiner GMC. Service manager : gabriel duron service manager greiner Buick GMC (760)245-3452 ext 207

- Apple Valley, CA, USA

I was traveling on a busy roadway at 40 mph when fuel filter warning light came on suddenly and vehicle lost all power - including the loss of power steering and power braking. Thankfully I had not yet entered the highway and was able to slow vehicle down but with great difficulty and not injure anyone around and that day was not towing a load. Vehicle would not restart. I had it towed to nearest dealership who then informed me that the "Bosch CP4 fuel pump" had exploded sending metal shrapnel throughout the entire engines fuel system. The only fix was the entire replacement of the fuel system at a cost of over $11K. I had just purchased the truck 3 months prior. Upon hearing this, I see this has been a frequent safety problem affecting a whole line of 2011 - current GM, Ford, Dodge, and Jeep diesel vehicles equipped with the CP4 pumps. There are numerous lawsuits underway for this failure including one of a major accident while towing (what these trucks are made for) because of loss of power steering and braking upon engine stall after fuel pump explosion. The GM technical service bulletin for reference is #16-na-102. In addition, the NHTSA has received two manufacturer technical service bulletins on this very safety issue. This is very much a recall worthy safety issue. Losing engine power and loss to all power steering and power braking in these vehicles is beyond dangerous. In addition, when it is happening to vehicles designed to tow weights in excess of 30K pounds trailer load behind the affected vehicle the danger is amplified that much greater. Please issue a recall immediately. People's lives are very much at stake for GM's failure to remedy a known safety issue. GM lists it as only a "hard start or no start". they do not recognize in writing the danger of full power loss at highway speeds which is most often how it presents itself.

- Duncanville, TX, USA

This vehicle has had numerous electrical issue from the first few months of ownership. The trailer brake system failed and was replaced on October 2014. The vehicle has had many recalls that have been corrected by owner and service provider. The second summer of ownership the vehicle had radiator issues, and most recently electrical issues again and transmission issues. While driving the vehicle electrical dashboard goes into a flicker and shuts down. GMC was able to fix this issue at the owners cost with the vehicle being out of service for 3 weeks. GMC was to reimburse the owner for costs of a GM dealer that was not able to fix the issue (painter automotive)(February 9, 2017) of $300, this has not been reimbursed. The vehicle is now at the service station as it does not start with no codes. It has been out of service for 2 weeks and counting, this vehicle is no longer reliable or safe for us to drive. We have documentation of all the issues and video of the dashboard flicker.

- Park City, UT, USA