GMC Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234758) - 2016 - crc - 11/9/15
Instruments and Controls
159
SHIFTER UNLOCKED. BRAKE
TO SHIFT
This message displays when the
Safety Belt Assurance System times
out and allows the vehicle to be
shifted out of P (Park) after
30 seconds following brake apply.
See
“
Safety Belts
”
and
“
Child
Restraints
”
in the Index for
information about the importance of
proper restraint use.
This system may not function
properly if the airbag readiness light
is on. See
Airbag Readiness
Light
0
137
.
Security Messages
SERVICE THEFT DETERRENT
SYSTEM
This message displays when there
is a problem with the theft-deterrent
system. The vehicle may or may not
restart, so you may want to take the
vehicle to your dealer before turning
off the engine. See
Immobilizer
Operation
0
44
.
Steering System
Messages
STEERING ASSIST IS
REDUCED DRIVE WITH CARE
This message may display if a
problem occurs with the electric
power steering system. If this
message appears, steering effort
may be slightly higher than normal.
The vehicle is still safe to drive. Use
caution while in reduced assist
mode. If this message is persistent
or appears repeatedly, take the
vehicle to your dealer for service.
See
Steering
0
259
.
SERVICE POWER STEERING
(1500 Series)
This message displays when there
is a problem with electric power
steering. If this message displays
and a reduction in steering
performance or loss of power
steering assistance is noticed. See
your dealer. See
Steering
0
259
.
SERVICE POWER STEERING
(2500/3500 Series)
This message displays when there
is a problem with the power steering
assist system. If this message
displays the vehicle can be driven
but should be repaired as soon as
possible. See your dealer. See
Steering
0
259
.
Tire Messages
SERVICE TIRE MONITOR
SYSTEM
If equipped with the Tire Pressure
Monitor System (TPMS), this
message displays if a part on the
system is not working properly. The
tire pressure light also flashes and
then remains on during the same
ignition cycle. See
Tire Pressure
Light
0
146
. Several conditions may
cause this message to appear. See
Tire Pressure Monitor Operation
0
410
. If the warning comes on and
stays on, there may be a problem
with the TPMS. See your dealer.