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2012 GMC Sierra Denali
Owner's manual
Malfunction Indicator Lamp; Charging System Light; Indicator Lamp - GMC 2012 Sierra Denali Owner's Manual
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:
Owner's manual
(492 pages)
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Contents
Table of Contents
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Table of Contents
Advertisement
{
WARNING
If the airbag readiness light ever
comes on and stays on, it means
that something may be wrong
with the airbag system. To help
avoid injury to yourself or others,
have the vehicle serviced right
away. See Airbag Readiness
Light on page 5 19 for more
information, including important
safety information.
Charging System Light
This light comes on briefly when the
ignition key is turned to START, but
the engine is not running, as a
check to show it is working.
If it does not, have the vehicle
serviced by your dealer.
The light should go out once the
engine starts. If it stays on,
or comes on while driving, there
could be a problem with the
charging system. A charging system
message in the Driver Information
Center (DIC) can also appear. See
Battery Voltage and Charging
Messages on page 5 39 for more
information. This light could indicate
that there are problems with a
generator drive belt, or that there is
an electrical problem. Have it
checked right away. If the vehicle
must be driven a short distance with
the light on, turn off accessories,
such as the radio and air
conditioner.
Instruments and Controls
Malfunction
Indicator Lamp
A computer system called OBD II
(On-Board Diagnostics-Second
Generation) monitors the operation
of the vehicle to ensure emissions
are at acceptable levels, to produce
a cleaner environment. This light
comes on when the vehicle is
placed in ON/RUN, as a check to
show it is working. If it does not,
have the vehicle serviced by your
dealer. See Ignition Positions on
page 9 27.
5-21
Table of
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Chapters
Table of Contents
2
In Brief
7
Keys, Doors, and Windows 2-1 Keys, Doors, and Windows Exterior Mirrors
33
Restraints
53
Instruments and Controls
111
Lighting 6-1 Lighting Interior Lighting Exterior Lighting
173
Infotainment System
183
Driving and Operating
251
General Information
339
Customer Information
461
Table of Contents
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