2009 GMC Canyon Owners Manual PDF | Page 144

Dome Lamp Override
The dome lamp override button is located below the
exterior lamps control.
E (Dome Lamp Override): Press this button in to
make the dome lamps remain off when the doors
are open. To return the lamps to automatic operation,
press
E again and return it to the out position.
Exit Lighting
The interior lamps will come on when the key is removed
from the ignition. The lamps will not come on if the dome
override button is pressed in.
Electric Power Management
The vehicle has Electric Power Management (EPM)
that estimates the battery?s temperature and state
of charge. It then adjusts the voltage for best
performance and extended life of the battery.
When the battery?s state of charge is low, the voltage is
raised slightly to quickly bring the charge back up.
When the state of charge is high, the voltage is lowered
slightly to prevent overcharging. If the vehicle has a
voltmeter gage or a voltage display on the Driver
Information Center (DIC), you may see the voltage
move up or down. This is normal. If there is a problem,
an alert will be displayed.
The battery can be discharged at idle if the electrical
loads are very high. This is true for all vehicles.
This is because the generator (alternator) may not be
spinning fast enough at idle to produce all the power that
is needed for very high electrical loads.
A high electrical load occurs when several of the
following are on: headlamps, high beams, fog lamps,
rear window defogger, climate control fan at high speed,
heated seats, engine cooling fans, trailer loads, and
loads plugged into accessory power outlets.
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 power, whenever
needed. It can temporarily reduce the power demands of
some accessories.
Normally, these actions occur in steps or levels, without
being noticeable. In rare cases at the highest levels
of corrective action, this action may be noticeable to
the driver. If so, a Driver Information Center (DIC)
message might be displayed, such as BATTERY
SAVER ACTIVE, BATTERY VOLTAGE LOW, or
3-16

2009 GMC Canyon Owners Manual Summary of Content

Dome Lamp OverrideThe dome lamp override button is located below theexterior lamps control.E (Dome Lamp Override): Press this button in tomake the dome lamps remain off when the doorsare open. To return the lamps to automatic operation,pressE again and return it to the out position.Exit LightingThe interior lamps will come on when the key is removedfrom the ignition. The lamps will not come on if the domeoverride button is pressed in.Electric Power ManagementThe vehicle has Electric Power Management (EPM)that estimates the batterys temperature and stateof charge. It then adjusts the voltage for bestperformance and extended life of the battery.When the batterys state of charge is low, the voltage israised slightly to quickly bring the charge back up.When the state of charge is high, the voltage is loweredslightly to prevent overcharging. If the vehicle has avoltmeter gage or a voltage display on the DriverInformation Center (DIC), you may see the voltagemove up or down. This is normal. If there is a problem,an alert will be displayed.The battery can be discharged at idle if the electricalloads are very high. This is true for all vehicles.This is because the generator (alternator) may not bespinning fast enough at idle to produce all the power thatis needed for very high electrical loads.A high electrical load occurs when several of thefollowing are on: headlamps, high beams, fog lamps,rear window defogger, climate control fan at high speed,heated seats, engine cooling fans, trailer loads, andloads plugged into accessory power outlets.EPM works to prevent excessive discharge of thebattery. It does this by balancing the generators outputand the vehicles electrical needs. It can increaseengine idle speed to generate more power, wheneverneeded. It can temporarily reduce the power demands ofsome accessories.Normally, these actions occur in steps or levels, withoutbeing noticeable. In rare cases at the highest levelsof corrective action, this action may be noticeable tothe driver. If so, a Driver Information Center (DIC)message might be displayed, such as BATTERYSAVER ACTIVE, BATTERY VOLTAGE LOW, or3-16