GMC 2012 Sierra Series Owner's Manual page 498

10-98 Vehicle Care
2. Turn the engine off and firmly set
the parking brake.
3. Securely attach the vehicle
being towed to the tow vehicle.
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).
4. Shift the transfer case to
N (Neutral). See Shifting into
Neutral under Four-Wheel Drive
on page 9 43 for the proper
procedure to select the Neutral
position for the vehicle.
5. Release the parking brake only
after the vehicle being towed is
firmly attached to the towing
vehicle.
6. Turn the ignition to LOCK/OFF
and remove the key
steering wheel will still turn.
After towing, see Shifting Out of
Neutral under Four-Wheel Drive on
page 9 43 for the proper procedure
to take the vehicle out of the Neutral
position.
I n f o r ma t i o n P r o v i d e d b y :
Dolly Towing
Front Towing (Front Wheels Off
the Ground)
Vehicles
the
Notice: If a two-wheel drive
vehicle is towed with the rear
wheels on the ground, the
transmission could be damaged.
The repairs would not be covered
by the vehicle warranty. Never
tow the vehicle with the rear
wheels on the ground.
Two-Wheel-Drive