GMC 2011 Sierra - Manual (Page 528)

Black plate (104,1) GMC Sierra Owner Manual - 2011
10-104 Vehicle Care
Dinghy Towing
Two-Wheel-Drive Vehicles
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
transmissions have no provisions
for internal lubrication while being
towed.
Four-Wheel-Drive Vehicles
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.
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 9‑54 for the proper
procedure to select the Neutral
position for the vehicle.