2010 GMC Terrain Owner's Manual - Page 241

Driving and Operating 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 and 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). 8-33 Shifting Out of Park To shift out of P (Park): 1. Apply the brake pedal. 2. Press the shift lever button. 3. Move the shift lever. If you still are unable to shift out of P (Park): 1. Fully release the shift lever button. 2. Hold the brake pedal down and press the shift lever button again. 3. Move the shift lever. If you still cannot move the shift lever from P (Park), see your dealer/ retailer for service. Parking Over Things That Burn { WARNING Things that can burn could touch hot exhaust parts under the vehicle and ignite. Do not park over papers, leaves, dry grass, or other things that can burn.