Door Locks - GMC Yukon 2021 Owner's Manual

There is an emission control system
malfunction and the malfunction indicator
lamp is on.
The hazard flashers are on.
Two remote vehicle starts or a start with
an extension have already been used.
The vehicle is not in P (Park).
The vehicle is not off.
The engine will turn off during a remote
vehicle start if:
The coolant temperature gets too high.
The oil pressure gets low.
The remote key range may be reduced
while the vehicle is running.
Other conditions can affect the performance
of the remote key. See Remote Keyless Entry
(RKE) System 0 8 or
Vehicle Personalization 0 125.
Starting the Engine Using Remote Start
1. Press twice on the remote key. The
turn signal lamps will flash. The lamps
flash to confirm the request to remote
start the vehicle has been received.
During the remote start, the doors will
be locked and the parking lamps will
remain on as long as the engine is
running.
2. The engine will shut off after 15 minutes
or after the remainder of the 30 minute
total running time is used, unless you
stop the remote start before engine
running has completed or the vehicle is
turned on.
3. Press the brake pedal and turn the
ignition on to drive the vehicle.
Extending Engine Run Time
Remote start can be used for up to
30 minutes of total engine run time.
After two remote starts of 15 minutes,
or multiple shorter time starts totaling
30 minutes have been used, the vehicle
must be started and then turned off before
the remote start can be used again.
Canceling a Remote Start
To cancel a remote start, do one of the
following:
Press and hold until the parking
lamps turn off.
Turn on the hazard warning flashers.
Turn the ignition on and then off.
Keys, Doors, and Windows

Door Locks

Warning
Unlocked doors can be dangerous.
Passengers, especially children, can
easily open the doors and fall out of a
moving vehicle. The doors can be
unlocked and opened while the vehicle
is moving. The chance of being thrown
out of the vehicle in a crash is
increased if the doors are not locked.
So, all passengers should wear seat
belts properly and the doors should be
locked whenever the vehicle is driven.
Young children who get into unlocked
vehicles may be unable to get out.
A child can be overcome by extreme
heat and can suffer permanent injuries
or even death from heat stroke.
Always lock the vehicle whenever
leaving it.
Outsiders can easily enter through an
unlocked door when you slow down
or stop the vehicle. Locking the doors
can help prevent this from happening.
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