2007 GMC SIERRA service

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Page 228 of 680

GMC SIERRA 2007  Owners Manual EPM works to prevent excessive discharge of the
battery. It does this by balancing the generator’s
output and the vehicle’s electrical needs. It
can increase engine idle speed to generate more
pow

Page 250 of 680

GMC SIERRA 2007  Owners Manual Airbag Readiness Light
There is an airbag readiness light on the instrument
panel cluster, which shows the airbag symbol. The
system checks the airbag’s electrical system for
malfunctions. The light

Page 251 of 680

GMC SIERRA 2007  Owners Manual This light will go off when you turn the airbag on.
SeeAirbag Off Switch on page 93for more on
this, including important safety information.
{CAUTION:
If the right front passenger’s airbag is
turned

Page 252 of 680

GMC SIERRA 2007  Owners Manual If the word ON or the on symbol is lit, it means
that the right front passenger’s frontal airbag
is enabled (may in�ate). SeeAirbag Off Switch on
page 93for more on this, including important
safety

Page 254 of 680

GMC SIERRA 2007  Owners Manual If, after several seconds, both status indicator
lights remain on, or if there are no lights at
all, there may be a problem with the lights or the
passenger sensing system. See your
dealer/retailer fo

Page 255 of 680

GMC SIERRA 2007  Owners Manual Voltmeter Gage
Your vehicle may have
a voltmeter gage.
When the ignition is in RUN, this gage indicates
the battery voltage.
When the engine is running, this gage shows the
condition of the charging s

Page 256 of 680

GMC SIERRA 2007  Owners Manual Brake System Warning Light
With the ignition on, the brake system warning
light will come on when you set the parking brake.
If you try to drive with the parking brake engaged,
a chime will sound when

Page 257 of 680

GMC SIERRA 2007  Owners Manual Anti-Lock Brake System
Warning Light
With the Anti-Lock
Brake System (ABS),
this light will come on
when you start your
engine and may stay on
for several seconds.
That is normal. If the light does no