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OPTIONAL EQUIPMENT
SWITCHES – REAR WINDOW
6N5
INOPERATIVE
Rear door window switches are inoperable. Rear door power
regulators are operable only from driver position switches.
REAR DOOR LOCKS AND
6N6
HANDLES INOPERATIVE
Rear door locking rods are disabled. Rear door locks are inoperable at
rear doors, but operate from driver position. Inside rear door handles
are disconnected. Rear doors can only be opened from the outside.
6C7
AUXILIARY DOME LAMP
Auxiliary dome lamp is located on the headliner to the rear of
the overhead console and is switched at the rear lamp base.
Lamp is wired separately standard dome lamps with red and
white LED bulbs.
2019 TAHOE 4X4
SPECIAL SERVICE
6J7
Option 6J7 provides a headlamps high beam flashing module, rear
lamps flashing via the Body Control Module (BCM) and a control
wire for customer-furnished switching to turn the module on and off.
The flasher control wire is part of the blunt-cut upfitter harness
coiled under the instrument panel in the front passenger side foot
well. The flashing module is located on the rear edge of the right
hand upper radiator support.
The headlamp flashing module is activated by the application of 12
volts to a dark green wire in the upfitter harness connector labeled
6J3. When activated, the headlamp high beams and the high beam
instrument cluster indicator will flash alternately at 3.0 flashes per
second. When the flashing module is turned on, the module sends a
signal to the BCM which alternately flashes the stop lamps and
backup lamps at the same flash rate as the headlamps. Depressing
the brake pedal will override the stop lamp flashing and placing the
transmission in Reverse will override the backup lamps flashing.
During daylight conditions, the Daytime Running Lamps (DRL) are
automatically turned off whenever the headlamps flashing module is
activated. During night time conditions, the low beam headlamps
automatically turn on while the high beam lamps flash. Turning on
the high beam headlamps manually will override the flashing module
and the high beam headlamps will operate continuously. During
night time conditions the tail lamps will turn on automatically. If
Option 9G8 is present the low beam headlamps and tail lamps will
not come on automatically. The Center Mounted Stop Lamp will
operate only when the service brakes are applied.
A 10-amp fuse labeled POLICE UPFITTER protects the flasher
module circuit. The fuse is located in the Underhood Electrical
Center in the engine compartment on the driver side of the vehicle.
See also the Owner Manual for more information.
Activation of the headlamps flashing and rear lamps flashing can be
separated by opening the blue/green BCM circuit at the flasher
module connector, C196-F, and applying a customer-switched
ground to the blue/green wire in the upfitter harness which is
located under the center instrument panel. Power to the green
flasher module activation wire must be off for the rear lamps flashing
only.
Warning:
BCM will be damaged if 12V power is connected to the dark-blue/yellow wire.
NOTE: For wiring diagram see Wiring Section
26
EXTERIOR LAMPS EMERGENCY
FLASHING SYSTEM
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