2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 506

10-100 Vehicle Care transmissions have no provisions for internal lubrication while being towed. Four-Wheel-Drive Vehicles 3. Securely attach the vehicle being towed to the tow vehicle. Dinghy Towing Two-Wheel-Drive Vehicles { WARNING Shifting a four-wheel-drive vehicle's transfer case into N (Neutral) can cause the vehicle to roll even if the transmission is in P (Park). The driver or others could be injured. Make sure the parking brake is firmly set before the transfer case is shifted to N (Neutral). Notice: If the vehicle is towed with all four wheels on the ground, the drivetrain components could be damaged. The repairs would not be covered by the vehicle warranty. Do not tow the vehicle with all four wheels on the ground. Two-wheel-drive vehicles should not be towed with all four wheels on the ground. Two-wheel-drive Use the following procedure to dinghy tow a four-wheel-drive vehicle: 1. Position the vehicle being towed behind the tow vehicle and shift the transmission to P (Park). 2. Turn the engine off and firmly set the parking brake. 4. Shift the transfer case to N (Neutral). See "Shifting into Neutral" under Four-Wheel Drive on page 9‑50 for the proper procedure to select the Neutral position for the vehicle.