2021 GMC Yukon Reliability Score & Common Problems

Owners report frequent issues with the electrical system of the 2021 GMC Yukon, particularly involving the fuel pump control module, which can lead to sudden vehicle shutdowns and inability to restart, often occurring around 9,000 to 61,263 miles. Complaints frequently mention problems with the infotainment system, including random brightness changes and complete failures in cold weather, which can be distracting. Several reports describe safety restraint system failures, including airbag non-deployment during crashes, with two injuries reported. These issues present potential safety risks, such as loss of vehicle control and increased accident likelihood, which prospective buyers should consider.

Owners report frequent failures of the fuel pump control module in the 2021 GMC Yukon, often resulting in the vehicle stalling or failing to start. Common symptoms include sudden loss of power while driving, inability to restart the engine, and in some cases, the vehicle not shifting into neutral. These issues typically occur at various mileages, with some reports as early as 14,000 miles and others beyond 100,000 miles. Safety implications are significant, as multiple owners describe being stranded in traffic or on highways without warning, leading to potential hazards. Additionally, several owners note that their vehicles are not included in existing recalls, despite experiencing the same issues, which could be a consideration for used car buyers.

Owners of the 2021 GMC Yukon frequently report issues with the steering system, with common symptoms including loss of power steering, a locked steering wheel, and abnormal noises when turning. Complaints often arise around 67,000 to 123,000 miles, with some owners mentioning mileage as low as 20,000. Two incidents involve crashes, one resulting in an injury, due to sudden loss of steering control, highlighting significant safety implications. Buyers should be aware of potential steering failures and the need for diagnostic and repair efforts, which may not always resolve the issues as evidenced by repeated problems and lack of available fixes.

Owners report frequent issues with the airbag system in the 2021 GMC Yukon, often involving the "Service Safety Restraint" light illuminating. Complaints frequently mention recurring problems even after repairs, with the light reappearing after service. Several owners describe airbag non-deployment during collisions, with five crashes and seven injuries reported. The issues appear across various mileage ranges, including vehicles with as few as 7,000 miles. These patterns suggest potential safety implications, as multiple incidents involve airbag failure in crashes, which prospective buyers should consider.

Owners report persistent issues with the air suspension system of the 2021 GMC Yukon, especially in cold weather conditions. Complaints frequently mention the system's failure to maintain proper ride height, leading to excessive bouncing and instability at various speeds, with some cases occurring at highway speeds. These issues are often linked to freezing temperatures and have been noted both during and after the warranty period, with some owners experiencing recurring problems over multiple winters. Multiple reports highlight safety implications, such as compromised vehicle stability and increased risk of loss of control. The problems are observed in vehicles with varying mileages, with some occurring shortly after purchase and others after extended use.

Owners of the 2021 GMC Yukon frequently report issues with the automatic braking system engaging unexpectedly. Complaints describe the vehicle coming to a sudden stop without any obstruction in the roadway, often at both low and high speeds, which results in a jarring experience for occupants. Incidents occur across various driving conditions, and some reports indicate that these issues began shortly after purchase. Safety implications are significant, with reports of injuries caused by sudden braking, including one instance where luggage struck a passenger, leading to a suspected concussion. Potential buyers should be aware of these recurring issues, as they may impact both safety and driving comfort.

Owners of the 2021 GMC Yukon frequently report issues with the service brakes, including inconsistent braking performance and brake system failures. Typical symptoms include a loss of braking power, vibrations, and unresponsive brakes, with some owners experiencing the brakes engaging without warning or failing to stop the vehicle. These issues are commonly reported around 20,000 to 95,000 miles. Safety implications are significant, with one complaint involving a crash due to the failure of the automatic emergency braking system. Buyers should be aware of recurring problems with the master cylinder and brake pad sensors, which some owners have had difficulty resolving through dealerships.