NHTSA Complaint #11623416 — 2018 GMC YUKON

I am writing as a concerned owner of a 2018 GMC Yukon Denali, which I purchased in 2018. Over the past six years, I have encountered multiple critical issues with the vehicle, specifically with the transmission and motor mounts. These issues have been both recurring and costly to address, raising concerns over the reliability and safety of the vehicle. Recently, I experienced a complete transmission failure that required a full replacement, which was both unexpected and financially burdensome. Additionally, I have had to replace two motor mounts, further highlighting what appears to be a design or manufacturing flaw affecting multiple components within the vehicle. These problems are not isolated incidents, as I have come across numerous accounts from other GMC customers facing similar challenges with their transmissions and motor mounts. The recurring nature of these failures suggests a systemic issue that impacts not only me but many others, both financially and in terms of vehicle safety. I’d like to note that these issues were confirmed by authorized GM dealers. The motor mounts were diagnosed and replaced at Koons in Woodbridge, VA, with the drive motor mount diagnosed in 2023. The transmission was diagnosed, repaired, and inspected by Jack Winegardner Chevrolet in Fort Washington, MD, in August 2024. What is particularly concerning is the lack of any warning lights or messages alerting me to potential problems. For the motor mounts, I noticed snapping and clicking sounds when accelerating or stopping, along with significant shaking while driving. For the transmission, the vehicle began slipping and jerking when changing gears, a problem that became apparent only upon experiencing it firsthand. General Motors’ mission statement emphasizes a commitment to innovation, sustainability, and safety. However, the persistent issues with the Yukon Denali’s transmission and motor mounts seem to undermine these values, especially concerning driver and passenger safety. Fa