NHTSA Complaint #11463966 — 2020 CHEVROLET SILVERADO 3500

GM recall N2123544170 DPF regeneration temperature /DEF heater for cold weather operation to keep def from freezing and also for thawing frozen def...dealer to replace def tank and internal heating element...dealer was unable to give a time line for replacement parts needed to fix truck.(parts are back ordered)So truck ECM=electonic control module.throws trouble code to reduce engine power that starts taking away engine power at 65 mph...then 55 mph... then 45... all the way down to 5 mph. This can happen at any time or anywhere that can result in possible accidents... ! GM needs to make this a priority as thousand of vehicles are affected!