GMC 2018 Terrain Owner's Manual page 180

Caution
The vehicle is not designed to
stay in N (Neutral) for extended
periods of time. It will
automatically shift into P (Park) if
left in Car Wash Mode.
Car Wash Mode (Engine Off
Driver in Vehicle)
To place the vehicle in N (Neutral)
with the engine off and the vehicle
occupied:
1. Drive to the entrance of the
car wash.
2. Apply the brake pedal.
3. Shift to N (Neutral).
4. Turn off the engine and release
the brake pedal.
5. The indicator should continue
to show N. If it does not, repeat
Steps 2 4.
6. The vehicle is now ready for
the car wash.
Car Wash Mode (Engine Off
Driver out of Vehicle)
To place the vehicle in N (Neutral)
with the engine off and the vehicle
unoccupied:
1. Drive to the entrance of the
car wash.
2. Apply the brake pedal.
3. Open the door.
4. Shift to N (Neutral).
5. Turn off the engine and release
the brake pedal.
6. The indicator should continue
to show N. If it does not, repeat
Steps 2 5.
7. Exit the vehicle and close the
door. The vehicle is now ready
for the car wash.
8. Ensure the vehicle is in
P (Park) upon returning to the
vehicle.
Driving and Operating
Car Wash Mode (Engine On
Driver in Vehicle)
To place the vehicle in N (Neutral)
with the engine on and the vehicle
occupied:
1. Drive to the entrance of the
car wash.
2. Apply the brake pedal.
3. Shift to N (Neutral).
4. Release the brake pedal. The
vehicle is now ready for the
car wash.
Car Wash Mode (Engine On
Driver out of Vehicle)
To place the vehicle in N (Neutral)
with the engine on and the vehicle
unoccupied:
1. Drive to the entrance of the
car wash.
2. Apply the brake pedal.
3. Open the door.
4. Shift to N (Neutral), then
release the brake pedal.
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