What is the most commonly reported powertrain issue in the 2021-2022 Chevrolet Trailblazer?
The documented recurring issue is transmission malfunction and 'Shift to Park' errors, reported especially in 2021 and 2022 model years across powertrain variants. Owners have filed dozens of powertrain complaints, with the source listing powertrain as the top or near-top complaint category in those years. The source does not provide detailed symptoms or consequences, so only the error/malfunction itself is confirmed.