GMC Terrain 2017 Owner's Manual page 26

Warning
If the key is unintentionally
rotated while the vehicle is
running, the ignition could be
moved out of the RUN position.
This could be caused by heavy
items hanging from the key ring,
or by large or long items attached
to the key ring that could be
contacted by the driver or
steering wheel. If the ignition
moves out of the RUN position,
the engine will shut off, braking
and steering power assist may be
(Continued)
Warning (Continued)
impacted, and airbags may not
deploy. To reduce the risk of
unintentional rotation of the
ignition key, do not change the
way the ignition key and Remote
Keyless Entry (RKE) transmitter,
if equipped, are connected to the
provided key rings.
The ignition key, key rings, and RKE
transmitter, if equipped, are
designed to work together. As a
system, it reduces the risk of
unintentionally moving the key out
of the RUN position. If replacements
or additions are required, see your
dealer. Limit added items to a few
essential keys or small, light items
no larger than an RKE transmitter.
Keys, Doors, and Windows
Interference from radio-frequency
identification (RFID) tags may
prevent the key from starting the
vehicle. Keep RFID tags away from
the key when starting the vehicle.
The key that is part of the Remote
Keyless Entry (RKE) transmitter can
be used for the ignition and all
locks.
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