Table 1 shows two common engine and engine cooling related problems of the 2025 GMC Sierra 2500. The number one most common problem is related to the engine and engine cooling (three problems). The second most common problem is related to the gas recirculation valve (egr valve) (one problem).
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling problems | |
| Gas Recirculation Valve (egr Valve) problems |
Burning an unusual amount of oil. Have seen several instances of blue smoke in the exhaust. Have had to add over a quart of oil twice in less than 6500 miles. Read details...
Component / system failure the exhaust system, specifically the exhaust manifolds and previously the egr system components, appear to have failed or malfunctioned, allowing exhaust gases to enter the passenger cabin. The dealer initially replaced the egr cooler diverter on December 23, 2025. Read details...