CNGTruck

I own a 2015 Silverado 3500 HD with the dual fuel CNG option. it appears GM has stopped making parts for the CNG side of the truck. I have been fighting with GM for 18 months trying to get my truck fixed, haven't been able to switch to CNG for that time. They have told me several times they are done trying to fix my truck, but I have been pretty persistent, and they are still looking for the part. If you're wondering they are supposed to provide parts for all their products for 10 years but have made the decision apparently to violate that on this model. If you own one of these trucks, I'd be interested in your experiences with it. Truck was fine until it needed repairs.