GMC Defense 2006, Owner'S Manual Supplement

Page: 23 / 116

3-4
Service Lights/Blackout Control
Notice: If the vehicle is not going to be driven for
24 hours or more, the service lights switch must
be placed in the “ALL OFF” position. This will help
prevent the batteries from discharging. Continued
discharging could damage the batteries. Before
normal driving operations, turn on service lights to
ensure headlights, brake lights and turn signals
are operational.
The switch located on the left side of the accessory
panel is the service lights/blackout control.
With the ignition switch in the ON Position:
•
Pull the switch outward then push upward to the
service ON position. All normal service lamps
will be operational with normal controls.
•
Move the service lights/blackout switch to the
center ALL OFF position. All lamps and accessory
power to the vehicle will turn off.
•
Move the switch to the blackout position, the
following will occur:
    
The blackout lighting system will be operative.
    
The front and rear blackout marker lamps will
illuminate.
    
The blackout stoplamps will illuminate when
the brakes are applied.
 
  
The instrument panel warning lights will
remain functional.
    
The hazard lights will remain functional.
    
The horn will not be functional.
The vehicle’s military 12-pin trailer wiring connector
and trailer lamps are also controlled by this switch.