2004 GMC Sierra 1500 Pickup Owner's Manual - Page 351

Four-Wheel-Drive Vehicles Equipped with Transfer Case (NP1, NP2 and NP8) Use the following procedure to tow your vehicle: 1. Shift an automatic transmission to PARK (P), or a manual transmission to FIRST (1). 2. Turn the engine off, but leave the ignition on. 3. Firmly set the parking brake. 4. Securely attach the vehicle being towed to the tow vehicle. 5. Shift the transfer case to NEUTRAL. See Four-Wheel Drive on page 2-35 for the proper procedure to select the neutral position for your vehicle. 6. Release the parking brake only after the vehicle being towed is firmly attached to the towing vehicle. 7. Turn the ignition off and leave the steering column unlocked. {CAUTION: Shifting a four-wheel-drive vehicle's transfer case into NEUTRAL can cause your vehicle to roll even if the transmission is in Park (P) for an automatic transmission, or if your vehicle is in gear, for a manual transmission. You or others could be injured. Make sure the parking brake is firmly set before you shift the transfer case to NEUTRAL. 4-55