Table 1 shows nine common engine and engine cooling related problems of the 2014 GMC Sierra 1500. The number one most common problem is related to the engine and engine cooling (47 problems). The second most common problem is related to the radiator (nine problems).
6. 2l engine has well documneted problem with the valvetrane, I have had to fix it 2 times in 3 months. I have pictures and documents from servicing dealerships. Since my ownership, it has always been dealer-serviced. Unexpected catastrophic engine failure, which happened on a major interstate. Read details...
Vehicle radiator has leak at 86k miles. There is known issue w/radiator and thermostat in this truck leading to TSB 15829 . My truck has the same engine/drive-train/cooling system, but the year of the TSB only applies to ld models. GMC will not cover repair costs. Read details...
The truck shuts off while driving which disables the power steering, engine and power braking. The electrical systems seems to reboot and turn back on after a second or two. This also happens occasionally while driving at slower speeds and turning the steering wheel or after hitting the turn signal. Read details...