Table 1 shows seven common engine and engine cooling related problems of the 2015 GMC Sierra 1500. The number one most common problem is related to the engine and engine cooling (60 problems). The second most common problem is related to the radiator (eight problems).
Lifter and camshaft failed Read details...
Radiator forms stress cracks from constant thermostat cycling. The resulting cracks cause the radiator to leak. Gm has issued special coverages for certain models but doesn't acknowledge it is a very common problem on other models outside the coverage. Read details...
Violent and erratic shifting during acceleration and deceleration. . . A simultaneous pop and jerk happens. . . Also when accelerating and hitting passing gear the truck seems to stall out and then quickly engages to apply more power than expected. . . Read details...