Chevrolet Trailblazer EXT transmission stuck in park when hot after using air conditioner on Chevrolet Trailblazer EXT

Some Chevrolet Trailblazer EXT owners report experiencing issues with their transmission getting stuck in Park, particularly after using the air conditioner and when the vehicle is hot. This problem may be linked to a faulty Park switch, which is a common cause of the transmission shifter being immobilized. Additionally, a malfunctioning brake light switch can prevent the vehicle's computer from recognizing that the brake pedal is depressed, resulting in the shifter being stuck. Owners are also advised to inspect the shifter linkage at the transmission, as a broken or disconnected linkage can lead to similar issues. Intermittent occurrences, especially after bumps, may suggest a loose or damaged connector or a faulty shift sensor. To further diagnose the issue, it is recommended to check the shifter cable on the side of the transmission while someone moves the shifter, as this can help identify if the cable is the source of the problem.