CR recently published its 10 Least Reliable Cars list, which uses data from vehicles from the previous two model years to try and predict the future reliability of vehicles from the upcoming model year. Based on its findings, the 2021 Chevy Silverado and 2021 GMC Sierra are projected to be the least reliable vehicles, receiving a Predicted Reliability Score of just 13 out of 100.
A handful of identified problem areas with the 2019 and 2020 model-year Chevy Silverado and GMC Sierra contributed to the low Predicted Reliability Score for the 2021 model-year versions of the pickups. CR’s research found persistent issues with the trucks’ brakes and in-car electronics, along with some smaller and/or less persistent issues with the transmission and power equipment/accessories.
CR says it studies data taken from 329,000 vehicles from the previous two model years when trying to identify the most and least reliable vehicles for its annual ranking. These vehicles are also ranked across 17 potential problem areas, ranging from major components like the engine, transmission and four-wheel-drive system, to less crucial parts like the in-car electronics and body hardware. That means that anything from serious engine trouble to trim pieces falling off can have a negative impact on a vehicle’s Predicted Reliability Score.
The second and third least reliable vehicles for 2021, according to CR, are the Subaru Ascent and Volkswagen Atlas three-row crossovers, which received Predicted Reliability Scores of 18 and 19 out of 100, respectively.
The Chevy Silverado 1500 and GMC Sierra 1500 were the only full-size pickup trucks to appear on CR’s 10 Least Reliable Vehicles list. They weren’t the only pickups period, however, as the Chevy Colorado and GMC Canyon also make an appearance in this unfortunate ranking.
“One of the main reasons people buy a brand-new car is the promise of a no-hassle ownership experience, free from the drip, drip, drip of service problems that set in as cars age,” CR concludes. “Nonetheless, CR’s exclusive Auto Surveys tell us that some buyers will be taking their brand-new car back to the dealer’s service department sooner and more often than other car buyers will.”
GM has already issued a number of recalls for the 2019 and 2020 model-year Chevy Silverado and GMC Sierra 1500 so far, including one over braking issues on the trucks.