2009 GMC Canyon Owner's Manual - Page 234

Four-Wheel-Drive Vehicles { CAUTION: Shifting a full-time four-wheel-drive vehicle's transfer case into N (Neutral) can cause the vehicle to roll even if the automatic transmission is in P (Park) or the manual transmission is in any gear. You or others could be injured. Make sure the parking brake is firmly set before the transfer case is shifted to N (Neutral). 5. Secure the vehicle to the dolly following the manufacturer's instructions. Use the following procedure to dolly tow a four-wheel-drive vehicle from the front: 1. Attach the dolly to the tow vehicle following the dolly manufacturer's instructions. 2. Drive the front wheels onto the dolly. 3. Put an automatic transmission in P (Park) or a manual transmission in 1 (First). 4. Turn the engine off and firmly set the parking brake. See Parking Brake on page 2-31. 6. Shift the transfer case to N (Neutral). See "Shifting to Neutral" under Four-Wheel Drive on page 2-26. 7. Release the parking brake only after the vehicle being towed is firmly attached to the towing vehicle. 8. Turn the ignition to LOCK/OFF. After towing, see "Shifting Out of Neutral" under Four-Wheel Drive on page 2-26. If the vehicle being towed will not be started or driven for six weeks or more, remove the battery cable from the negative terminal (post) of the battery to prevent the battery from draining. 4-44