1997 GMC Sonoma Owner's Manual - Page 181

Recreational Vehicle Towing (Four-wheel Drive With Manual Shift Transfer Case Only) 1. Set the parking brake firmly. 5. Release the parking brake only after the vehicle being towed is firmly attached to the tow vehicle. 6 . Insert the ignition key into the ignition switch and turn it one notch forward of the LOCK position. This places the key in the OFF position, which unlocks the steering column while preventing battery drain. Unlocking the steering column will allow for proper movement of the front wheelshiresduring towing. 2. Place an automatic transmission in PARK (P) or a manual transmission in FIRST ( 1). 3. Firmly attach the vehicle being towed to the tow vehicle. Do not tow the vehicle by the rear bumper bar. Refer to the hitch manufacturer's instructions. 4. Place the manual shift transfer case shiftlever in NEUTRAL (N). -- Recreational Vehicle Towing (Except Four-wheel Drive With Manual Shift Transfer Case) Vehicles with two-wheel drive or the optional electronic shift transfer case requirespecial modifications before they can be towed in this manner. Please contact your dealer forthe towing information that is appropriate for your particular vehicle. Shifting the transfer case into NEUTRAL can (N) cause your vehicle to roll if the transmission even is in PARK (P), for an automatictransmission, or if your vehicle is in gear, a manual for transmission. You or others could be injured. is Make sure the parking brake firmly set before you shift the transfer case into NEUTRAL (N). 1 4-43