One problem related to manifold/header/muffler/tail pipe has been reported for the 2018 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 GMC Sierra 1500 based on all problems reported for the 2018 Sierra 1500.
Fuel injection seals #4 o-ring split - leaking fuel - pooling gas on manifold. Took vehicle in for smell of gas, lack of acceleration and poor gas mileage. This is known issue based on the service bulletin 18-na-137 - vehicle has less than 6000 miles.
| Radiator problems | |
| Engine And Engine Cooling problems | |
| Manifold/header/muffler/tail Pipe problems | |
| Service Engine Light On problems | |
| Car Stall problems |