Chevrolet Trailblazer EXT transmission solenoid engagement issue on Chevrolet Trailblazer EXT

Some Chevrolet Trailblazer EXT owners report experiencing transmission solenoid engagement issues, including electrical problems such as under dash shorting, accessory plug sparks, and malfunctioning dash lights. Additionally, gear shifting problems may arise from misaligned throttle position sensors, faulty shift solenoids, or general wear and tear, particularly in higher mileage vehicles. In some cases, owners have reported that after clearing transmission lines and installing a used transmission, the vehicle starts off in 3rd gear, with difficulties engaging 1st or 4th gears even after replacing solenoids. Service Bulletin number 24-NA-009 indicates that certain Trailblazer models may have issues with the continuously variable transmission (CVT). Furthermore, diagnostic processes have revealed fault codes such as P0746, prompting owners to seek dealership inspections and evaluations of their transmissions. Addressing these concerns promptly is crucial for maintaining vehicle performance and safety.