GMC CHEVROLET Silverado 1500 2021 Owner's Manual page 397

396 Vehicle Care
Dinghy Towing (Vehicles with a
Two-Speed Transfer Case)
Only dinghy tow four-wheel-drive vehicles
with a two-speed transfer case that have an
N (Neutral) and a 4 (Four-Wheel Drive
Low) setting.
Warning
Shifting a four-wheel-drive vehicle's
transfer case into N (Neutral) can allow
the vehicle to move even if the
transmission is in P (Park). You or others
could be injured. Set the parking brake
and use wheel blocks before shifting the
transfer case to N (Neutral).
To dinghy tow:
1. Position the vehicle being towed behind
the tow vehicle, facing forward and on a
level surface.
2. Securely attach the vehicle being towed
to the tow vehicle.
3. Apply the parking brake and start the
engine.
4. Shift the transfer case to N (Neutral). See
Shifting into N (Neutral) under
Four-Wheel Drive 0 241.
5. With the engine running, release the
parking brake and verify that the
transfer case is in N (Neutral) by shifting
the transmission to D (Drive) and then to
R (Reverse). There should be no
movement while shifting the
transmission.
6. Shift the transmission to D (Drive).
7. If equipped with an ignition key, turn
the ignition to ACC/ACCESSORY.
If equipped with Keyless Access, turn the
engine off. Disregard the Shift to P (Park)
DIC message. See Ignition Positions
(Keyless Access) 0 230 or
Ignition Positions (Key Access) 0 229.
Warning
To avoid death, serious injury,
or property damage, before dinghy
towing the vehicle, always disconnect and
secure the negative battery cable and
cover the negative battery post and cable
with a non-conductive material. If the
battery is left connected or the battery
cable contacts the post, the Electric
Parking Brake may activate during
towing, which could cause a crash.
8. Disconnect the negative ( ) battery
cable. See Negative Battery Cable
Disconnection in Battery - North
America 0 342.
9. Shift the transmission to P (Park).
Caution
If the steering column is locked, vehicle
damage may occur.
10. Move the steering wheel to make sure
the steering column is unlocked.
11. If the vehicle has an ignition key, keep it
in the towed vehicle in ACC/ACCESSORY
to prevent the steering column from
locking. If the vehicle is equipped with