2004 GMC Canyon Owner's Manual - Page 112

Torque Lock If you are parking on a hill and you don't shift your transmission into PARK (P) properly, the weight of the vehicle may put too much force on the parking pawl in the transmission. You may find it difficult to pull the shift lever out of PARK (P). This is called "torque lock" To prevent torque lock, set the parking brake and then shift into PARK (P) properly before you leave the driver's seat. To find out how, see Shifting Into Park (P) (Automatic Transmission) on page 2-30. When you are ready to drive, move the shift lever out of PARK (P) before you release the parking brake. If torque lock does occur, you may need to have another vehicle push yours a little uphill to take some of the pressure from the parking pawl in the transmission, so you can pull the shift lever out of PARK (P). Shifting Out of Park (P) (Automatic Transmission) Your vehicle has an automatic transmission shift lock control system which locks the shift lever in PARK (P) when the ignition is in the LOCK position. In addition, you have to fully apply the regular brakes before you can shift from PARK (P) when the ignition is in ON. See Automatic Transmission Operation on page 2-21. If you cannot shift out of PARK (P), ease pressure on the shift lever by pushing the shift lever all the way into PARK (P) as you maintain brake application. Then, press the shift lever button and move the shift lever into the gear you want. If you ever hold the brake pedal down but still cannot shift out of PARK (P), try this: 1. Turn the key to ACC (Accessory). (There is no shift interlock in this key position.) 2. Apply and hold the brake until the end of Step 4. 3. Shift the transmission to NEUTRAL (N). 4. Start the vehicle and then shift to the gear you want. 5. Have the system fixed as soon as you can. 2-32