2012 Buick Verano Owner Manual - Page 225

Driving and Operating Leaving the Vehicle with the Engine Running Torque Lock Torque lock is when the weight of the vehicle puts too much force on the parking pawl in the transmission. This happens when parking on a hill and shifting the transmission into P (Park) is not done properly; then it is difficult to shift out of P (Park). To prevent torque lock, set the parking brake and then shift into P (Park). To find out how, see "Shifting Into Park" listed previously. If torque lock does occur, the vehicle may need to be pushed uphill by another vehicle to relieve the parking pawl pressure, so you can shift out of P (Park). 9-25 Shifting out of Park Automatic Transmission Shift Lock The vehicle has an automatic transmission shift lock control system. The shift lock control system is designed to: . { WARNING It can be dangerous to leave the vehicle with the engine running. The vehicle could move suddenly if the shift lever is not fully in P (Park) with the parking brake firmly set. And, if you leave the vehicle with the engine running, it could overheat and even catch fire. You or others could be injured. Do not leave the vehicle with the engine running. If you have to leave the vehicle with the engine running, the vehicle must be in P (Park) and the parking brake set. Release the button and check that the shift lever cannot be moved out of P (Park). Prevent ignition key removal unless the shift lever is in P (Park). Prevent movement of the shift lever out of P (Park), unless the ignition is in ON/RUN and the brake pedal is applied. . The shift lock is always functional except in the case of an uncharged or low voltage (less than 9‐volt) battery.