CHEVROLET TAHOE 2013 3.G Service Manual

Black plate (11,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
Special Equipment Options 15-11
Exterior Lamp
Emergency Flashing
System - SEO 6J7
SEO 6J7 provides a high-beam
headlamps flashing module, rear
lamps flashing and control wire for a
customer-furnished switch to turn
the module on or off. The flasher
control wire is coiled under the
center of the instrument panel. This
control lead may be combined with
the interior wiring leads for SEO 6J3
when that option is ordered with
SEO 6J7.
The headlamps flashing module is
located below the passenger side
front headlamp and forward of the
passenger side front wheel. The
module is connected to an inline
connector in the forward lamp
harness. The headlamps flashing
module is activated by the
application of 12 volts to a dark
green/red wire coiled in the
passenger side footwell.When activated, the driver and
passenger side high-beam
headlamps and the high-beam
instrument panel cluster light will
flash alternately at 2.4 flashes per
second.
When the headlamps flashing
module is turned on, the module
sends a signal to the Body Control
Module (BCM). The BCM alternately
flashes the stop lamps and backup
lamps. Depressing the brake pedal
will override the stop lamp flashing
and placing the transmission in
reverse will override the backup
lamp flashing.
Activation of the headlamp and
rearlamp flashing can be separated
by opening the dark-blue/yellow
BCM circuit at the flasher module
connector, C122–F, and applying a
customer-switched ground to the
harness side of the wire in the
connector.
During daylight conditions, the
Daytime Running Lamps (DRL) are
automatically turned off whenever
the headlamps flasher module is
activated. During nighttime
conditions, the low-beam
headlamps turn on automatically
while the high-beam headlamps
flash. Turning on the high-beam
headlamps manually with the turn
signal/multifunction lever will
override the flashing module and
the high-beam headlamps will
operate continuously.

Black plate (12,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
15-12 Special Equipment Options
Headlamps Flasher Module—
SEO 6J7
A 20 amp fuse protects the flasher
module circuit. This fuse is located
in the underhood fuse block in the
engine compartment on the driver
side of the vehicle and is labelled
HEADLAMP WASHER. See “Engine
Compartment Fuse Block” in the
Vehicle Care section of the Tahoe
owner manual for more information. When it is dark outside, the
taillamps will turn on automatically.
The Center High-Mounted Stoplamp
(CHMSL) will not flash and will
operate only when the regular brake
pedal is pressed.

Black plate (13,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
Special Equipment Options 15-13
Forward Lamp Harness In-Line Connector for use with Headlamps Flasher Module, Option 6J7

Black plate (14,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
15-14 Special Equipment Options
Inactive Rear Door
Handles - SEO 6B2
Your vehicle may be equipped with
inactive door handles. The rear
doors can only be opened from the
outside.
Inactive Rear Door
Locks - SEO 6N6
Your vehicle may be equipped with
inactive rear door locks. The rear
door locks do not lock or unlock at
the door. Only the driver power door
lock switch locks or unlocks the rear
door locks.
Inactive Rear Door
Windows - SEO 6N5
Your vehicle may be equipped with
inactive rear door window control
switches. Only the driver power
window switches can operate the
rear windows.
Spotlamp - SEO 7X6
Spotlamp–Windshield Pillar
Mounted
A Unity Series 330, high intensity,
100 watt halogen (H3 bulb) 15 cm
(six inch) spotlamp is mounted in the
left windshield pillar. The lamp is
protected by a 15 amp fuse located
in the underhood electrical center.
See the service manual for lamp
replacement procedures.
Spotlamp Harness –SEO 7X6,
SEO 7X7
Spotlamps - SEO 7X7
SEO 7X7 includes a driver side and
a passenger side spotlamp located
in the windshield pillars. Each
spotlamp is protected by a separate
15 amp fuse located in the
underhood electrical center.
For spotlamp bulb replacement
procedures, see the appropriate
section of the service manual.

Black plate (15,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
Special Equipment Options 15-15
Wiring Provisions for
Emergency Vehicle Roof
Light - SEO TRW
Battery power is supplied through a
30 amp fuse to a wiring harness
located in the roof. Power is
controlled with a switch located in
the overhead console. The
customer or vehicle upfitter must
complete the installation to an
added accessory such as an
emergency beacon lamp.
Maximum rated electrical load is
21 amps (250 watts). The added
electrical requirements must not
exceed 21 amps (250 watts).
Running the accessory for long
periods of time with the engine off
may run the battery down.
Installation Instructions–
Emergency Vehicle Roof
Panel Lamp
Wiring to the accessory can be
done by either directly connecting
the wire in the roof to the accessory
(Option A) or by using Wiring Harness Package part number
12150250 obtained from GM
Service Parts (Option B).
A. 645 mm (25.39 in)
B. 440 mm (17.32 in)
C. 100 mm (3.94 in) square
D. Roof Centerline
E. Roof Edge
1. Disconnect the negative (−)
battery cable at the battery.
2. Make the electrical connections using either option A or option B. Notice:
Pulling the wiring
harness through a panel hole that
has sharp edges may cause
damage to the wire and/or wire
insulation. Remove sharp edges
from the panel hole before pulling
the wire through it.
Option A: Roof Wires Directly to
Accessory
1. Drill a 10 to 13 mm (3/8 in to 1/2 in) hole in the outer roof
panel in the area shown in the
illustration. The hole should only
go through the outer panel.
Remove all sharp edges from
the drilled hole.
2. Remove the inside overhead console access panel/lamp
lenses.
3. The accessory harness is coil tied to the passenger side of the
vehicle at the console inner
bracket.
4. Cut the tape holding the harness coil.

Black plate (16,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
15-16 Special Equipment Options
5. As one person watches the roofhole from the outside for the end
of the harness, a second person
from the inside of the vehicle
should snake the harness
toward the hole.
6. Pull out the wiring harness being careful to avoid scraping the
insulation on the edge of
the hole.
7. Extend the wiring harness to the accessory.
8. Connect the dark green wire to the accessory hot terminal.
9. Connect the black wire to the accessory ground terminal.
10. Cover the hole in the roof with a durable sealant such as
silicone rubber sealer.
11. Reinstall the overhead console access panel/lamp lenses. Option B: Use Wiring Harness
Package 12150250. Obtain from
GM Service Parts through the
GM Dealership
1. Drill a 32 mm (1.25 in) hole in
the outer roof panel in the area
shown in the illustration. The
hole should only go through the
outer panel. Remove all sharp
edges from the drilled hole.
2. Remove the inside overhead console access panel/lamp
lenses.
3. The accessory harness is coil tied to the passenger side of the
vehicle at the console inner
bracket.
4. Cut the tape holding the harness coil.
5. As one person watches the roof hole from the outside for the end
of the harness, a second person
from the inside of the vehicle
should snake the harness
toward the hole. 6. Pull out the wiring harness being
careful to avoid scraping the
insulation on the edge of
the hole.
7. Cut the wire to length. Install terminals to wire ends and insert
into the connector. The dark
green wire goes to cavity A and
the black wire in cavity B. Push
in the secondary lock to retain
the wires.
8. Attach the harness assembly from the package to the
accessory. Cover with the
supplied conduit for added
protection. Connect the orange
wire to the accessory hot
terminal and the black wire to
the ground.
9. Complete the connection from the roof harness to the extension
harness. Cover the mated
connector with the supplied
foam. Push the foam covered
connection and excess wire
through the roof panel hole.

Black plate (17,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
Special Equipment Options 15-17
10. Reinstall the overhead consoleaccess panel/lamp lenses.
Restoring Power
The auxiliary lamp switch is located
on the overhead console.
This switch includes wiring
provisions for a dealer or a qualified
service center to install an auxiliary
roof lamp. When the wiring is
connected to an auxiliary roof
mounted lamp, pressing the bottom
of the switch will activate the lamp
and illuminate an indicator light at
the bottom of the switch. Pressing the top of the switch again
will turn off the roof mounted lamp
and indicator.
1. Be sure that the auxiliary lamp
switch is off.
2. Vacate the vehicle and reconnect the battery cable.
3. Turn the auxiliary lamp switch on. The accessory should now
be working. If it is not working,
check the connections.
4. After ensuring that the accessory is working properly,
install the grommet in the hole.
Seal with silicone sealer to
prevent water leakage.
Notice: Overloading the vehicle's
electrical system may damage
your vehicle's accessories.
Do not overload the vehicle's
system by having unnecessary
accessories on at the same time.
Option B
A. Black Wire
B. Orange Wire
C. To Roof Mounted Lamp
D. Harness Assembly
E. Grommet (Roof)
F. Foam Insulator (Adhesive‐ Backed)
G. Harness Connector, Secondary Lock and Terminal
H. Dark Green and Black Wires
I. Vehicle Outer Roof Panel

Black plate (18,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
15-18 Special Equipment Options
Wiring Diagram for SEO TRW

Black plate (19,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
Special Equipment Options 15-19
Maintenance
The emergency roof light circuit is
fed from the fuse labeled Sunroof
located in the underhood electrical
center. Always replace the fuse with
a 30 amp mini-fuse.

Black plate (20,1)Chevrolet Tahoe Police and Special Service Packages - 2013 - CRC - 3/30/12
15-20 Special Equipment Options
Wiring Provisions for
Horn/Siren Circuit -
SEO 6J4
This provision permits customer
connection of a switch to select
either horn or siren operation when
the horn pad is pressed.A 0.35 mm² (22 gauge) wire is
connected to an in-line connector in
the horn circuit of the instrument
panel harness under the instrument
panel. The end of this harness
extension is in a 1.5 m (5 ft) loop of
wire coiled under the center of the
instrument panel.