Table 1 shows two common engine and engine cooling related problems of the 2020 GMC Sierra 3500. The number one most common problem is related to the engine and engine cooling (six problems). The second most common problem is related to the exhaust system emission control urea injection system (def) (one problem).
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling problems | |
| Exhaust System Emission Control Urea Injection System (def) problems |
The engine seized at 65mph. Available for inspection. Was left stranded in a limited access area with no cell service. There was no warning, the engine just stopped at highway speed and would not restart. The problem was confirmed by an independent service center. Read details...
Diesel exhaust fluid tank heater malfunctioned and meted tank and connectors. Read details...