general problems of the 2011 Chevrolet Silverado 3500

The def system on this vehicle has failed three times since we bought it in 2021. The weather was not pleasant and in one case it was extremely dangerous. The def system froze up and fortunately I was able to limp it into a dealer who managed to get it working again but not after losing half a day and spending a couple hundred dollars. The second time a sensor failed and I was able to reset the system myself via removing all the electricity from the vehicle and doing what they call a shady tree reset. The third time the vehicle went into limp mode on us was when a sensor failed and the def pump failed at the same time. Chevy refused to help us cover the cost of repairs and refuses to replace the defective system. The vehicle might be over ten years old but it is like showroom new, it only had 20,000 miles on it in 2021 when we bought it and the previous owner took very good care of the truck. The vehicle now only has 32,000 miles on it. Our main argument is that chevy aka gm knows about the defective systems and refuses to replace them. I have been in the transportation industry for a good part of my life and I know vehicles, especially diesel operated vehicles. The def systems are a complete joke and need to be removed especially for people who live in very cold climates.

Cp4 high pressure fuel pump failed causing loss of motive power (lomp) in oct of 2018. Truck became hard to steer and brake but I was traveling at a lower speed. Had it of been 1 hour later I would have been at freeway speeds pulling a 13000lbs trailer. I had the truck towed to a local dealer where they diagnosed the truck as having a failed cp4 high pressure fuel pump made by bosch. They informed me that the entire fuel system would have to be replaced do to the large amount of metal contaminants that this catastrophic failure produces and spreads though out the entire system. The total cost for the repairs were not covered under any type of warranty or recall and had to be paid entirely out of pocket. Not only was this a huge inconvenience as I was trying to leave town for a vacation it was very very expensive. I still can not understand why there has never been a recall on this issue. I think it can be related to a safety issue as a lomp. I believe gm knew that the cp4 pump was and could be a faulty product but continued to use it.