What year did the GMC Sierra have a bad transmission?
Quick Answer: 2009, 2010, 2011, 2012, 2013. The 2009, 2010, 2011, 2012, and 2013 models have the most reported GMC Sierra transmission problems. Complaints about the 2018 GMC Sierra transmission problems are common. GMC is aware that drivers may experience banging and clunking when the 2018 Sierra shifts.However, some GMC Sierra trucks have been included in class action lawsuits that allege serious defects in its 8-speed and 10-speed transmissions. Along with other Cadillac, Chevrolet and GMC models, 2016-2024 GMC Sierra trucks have experienced these transmission issues: Shifting problems.Quick Answer: 2009, 2010, 2011, 2012, 2013. The 2009, 2010, 2011, 2012, and 2013 models have the most reported GMC Sierra transmission problems. Other years are much better.Transmission problems are among the most common GMC issues reported, particularly in models like the GMC Acadia and GMC Sierra. Owners have reported instances of delayed engagement, rough shifting, and even complete transmission failure, which often arise around the 100,000-mile mark.
What is considered high mileage for a GMC Sierra?
As mentioned, high mileage GMC Sierra is considered to be one with around or over 200,000 miles, signaling it may soon encounter major repairs or issues. The 2025 Sierra 1500 AT4 is built from the ground up for off-road adventures while still being refined enough for daily driving.The 2025 GMC Sierra 1500 offers a range of trims catering to different drivers, but two of the most sought-after versions are the AT4 and the Denali. While the AT4 is designed for off-road capability, the Denali focuses on premium luxury and advanced technology.A 2019 or newer Sierra is the best-used choice, followed by 2011-2013 for those looking to spend substantially less. The GMC Sierra offers numerous engines, cab/bed configurations, and trims. The Sierra is often seen as the boss’s truck, offering more upscale features than its everyman twin, the Chevrolet Silverado.