2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 429

Rear Towing (Rear Wheels Off the Ground) Two‐Wheel‐Drive Vehicles Use the following procedure to dolly tow a two-wheel-drive vehicle from the rear: 1. Attach the dolly to the tow vehicle following the dolly manufacturer's instructions. 2. Drive the rear wheels onto the dolly. 3. Firmly set the parking brake. See Parking Brake on page 3‑54. 4. Put the transmission in P (Park). 5. Secure the vehicle to the dolly following the manufacturer's instructions. 6. Use an adequate clamping device designed for towing to ensure that the front wheels are locked into the straight position. 7. Turn the ignition to LOCK/OFF. 5-53