GMC Yukon XL 2013 Owner's Manual page 434

10-86 Vehicle Care
Four-Wheel Drive Vehicles with a
Two Speed Automatic
Transfer Case
Use the following procedure to
dinghy tow a four-wheel drive
vehicle with a two speed automatic
transfer case:
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.
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 See
Four-Wheel Drive (Single Speed
Automatic Transfer Case) on
page 9 39 or Four-Wheel Drive
(Two Speed Automatic Transfer
Case) on page 9 34.
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
(Single Speed Automatic Transfer
Case) on page 9 39 or Four-Wheel
Drive (Two Speed Automatic
Transfer Case) on page 9 34 for the
proper procedure to take the vehicle
out of the Neutral position.
the