Table 1 shows seven common power train related problems of the 2018 GMC Sierra 1500. The number one most common problem is related to the power train (112 problems). The second most common problem is related to the transmission gear slipping (four problems).
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I have a 2018 GMC sierra denali, when the vehicle is cold, usually first thing in the morning, the truck starts out in first gear and then feels like it lacks power or transmission is slipping and then bangs into 2nd gear. The more I drove the truck the worse it got. Read details...
The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the transmission vibrated. No warning lights were illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed with a failing torque converter. Read details...