wiring CHEVROLET TAHOE 2012 3.G Owners Manual

Black plate (2,1)Chevrolet Tahoe Police and Special Service Packages - 2012
3-2 Seats and Restraints
Q: How can I identify the airbag“deployment zone” in my
vehicle?
A: See Airbag Deployment
Diagrams on page 3‑4 for more
information. The diagrams
provide the approximate
dimensions of the “deployment
zones” for your specialty vehicle.
Before doing any service work,
including the installation of any
equipment, consult the
appropriate service manual.
Q: Is it possible to shield equipment so it does not
interfere with airbag
deployment?
A: While shielding may protect
certain equipment from being
damaged or dislodged, it may
also negatively affect how an
airbag inflates. Therefore, we
cannot recommend the
placement of any equipment in
the deployment zone, even
when shielding. Q: Can the installation of push
bumpers on the front end of
the vehicle affect the
deployment of the airbag?
A: It is not likely that installing push
bumpers will affect sensing for
the airbag as long as the vehicle
structure itself is not modified.
GM is not aware of any adverse
defects from the many push
bumpers that have been
installed on current model GM
police vehicles with airbags.
Q: Is there anything I might add to the front or sides of the
vehicle that could keep the
airbags from working
properly?
A: Yes. If you add things that
change your vehicle's frame,
bumper system, height, front end
or side sheet metal, they may
keep the airbag system from
working properly. Also, the
airbag system may not work
properly if you relocate any of
the airbag sensors. If you have any questions about this, you
should contact Customer
Assistance before you modify
your vehicle. The phone
numbers and addresses for
Customer Assistance are in
Step Two of the Customer
Satisfaction Procedures in the
owner manual. See
“Customer
Satisfaction Procedure” in the
owner manual Index.
The service manual has information
about the location of the airbag
sensors, sensing and diagnostic
module, and airbag wiring. See
“Service Publications Ordering
Information” in the owner manual.

Black plate (3,1)Chevrolet Tahoe Police and Special Service Packages - 2012
Seats and Restraints 3-3
Notices for Customer
Installed Equipment
Read the following notices before
installing equipment on your
specialty vehicle.
Notice:GM-approved service
procedures must be followed to
remove and reinstall the
instrument panel to the pad in
order to ensure proper airbag
deployment. Notice:
Do not mount equipment
on the passenger side of the
instrument panel top pad
deployment zone. Equipment
should not be mounted on or
around the passenger airbag
opening because of a deploying
airbag. To allow the airbag to
perform as it was designed, do
not mount equipment inside the
airbag deployment zone.
Notice: The police vehicle has
roof-rail airbags. Do not mount a
security barrier such that the
ends of the barrier or brackets
are within the roof-rail
deployment zones. Notice:
The police vehicle has
roof-rail airbags and a rollover
sensor. The rollover sensor is
mounted on the centerline of the
vehicle between the driver and
right front passenger positions.
If the vehicle has bucket seats,
the rollover sensor will be
exposed. Do not mount
equipment within 25 mm (1 in) of
the rollover sensor. This may
affect the performance of the
airbag system. To allow the
airbags to perform as they are
designed, do not mount
equipment near this area.
Notice: Avoid installing wiring for
roof-rail emergency lighting or
radio antennas that may restrict
the proper deployment of the
roof-rail airbags.

Black plate (1,1)Chevrolet Tahoe Police and Special Service Packages - 2012
Special Equipment Options 15-1
Special Equipment
Options
SEO Standard Options
SEO StandardOptions - Police Package
and Special Service
Package . . . . . . . . . . . . . . . . . . . 15-2
Wiring Provisions for 12-Volt Battery Power Supply . . . . . . 15-2
Auxiliary Battery Power Junction Blocks . . . . . . . . . . . . 15-8
Equipment Grounding Studs - Rear
Compartment . . . . . . . . . . . . . 15-10
Radio Suppression Grounding Straps . . . . . . . . . 15-10
SEO Available Options
Dual BatterySystem - SEO 6A6 . . . . . . . . 15-10
Exterior Lamp Emergency Flashing
System - SEO 6J7 . . . . . . . . 15-11
Inactive Rear Door Handles - SEO 6B2 . . . . . . . 15-14
Inactive Rear Door Locks - SEO 6N6 . . . . . . . . . 15-14
Inactive Rear Door Windows - SEO 6N5 . . . . . . 15-14
Spotlamp - SEO 7X6 . . . . . . . 15-14
Spotlamps - SEO 7X7 . . . . . . 15-14 Wiring Provisions for
Emergency Vehicle Roof
Light - SEO TRW . . . . . . . . . 15-15
Wiring Provisions for Horn/ Siren Circuit - SEO 6J4 . . . 15-20
Wiring Provisions for Vehicle Grille Lamps, Flasher, and
Speaker/
Siren - SEO 6J3 . . . . . . . . . . 15-22
Wiring Provisions Front Speakers - SEO WX7 . . . . . 15-24

Black plate (2,1)Chevrolet Tahoe Police and Special Service Packages - 2012
15-2 Special Equipment Options
SEO Standard
Options
SEO Standard Options -
Police Package and
Special Service Package
Notice:GM cannot be
responsible for any changes
made to the vehicle. Have all
electrical and body modifications
performed by experienced
technicians.
.Be sure that any modified or
added wiring will work
properly with your vehicle's
wiring system.
.See that all wiring is properly
protected by fuses, and not
causing an overload to
connectors and components.
.Do not route wiring in areas
of the vehicle where
temperatures can be high or
where wiring may be cut,
pinched or rubbed.
.See that all added wiring is
of the same or smaller gauge
than the wire it is being
attached to for proper fuse
protection.
.Be sure that all holes drilled
in the body are properly
sealed and corrosion
protected. See that the
vehicle's wiring harnesses,
piping and other components
have not been displaced or
damaged during customer
installations of equipment
and wiring.
Wiring Provisions for
12-Volt Battery Power
Supply

Black plate (3,1)Chevrolet Tahoe Police and Special Service Packages - 2012
Special Equipment Options 15-3
Wiring Provisions‐12‐Volt Battery Power

Black plate (5,1)Chevrolet Tahoe Police and Special Service Packages - 2012
Special Equipment Options 15-5
The vehicle is equipped with wiring
provisions for a 12-volt battery
power supply. Refer to the following
information when adding electrical
accessories that will use the 12-volt
power supply feeds connected to
the vehicle's electrical system. The
wiring harness is located below the
instrument panel near the center of
the vehicle. The following
information describes the breaker
and relay location and provides a
wiring diagram to aid in connecting
customer equipment.
Electrical Connections
Notice:Before modifying or
adding any wiring, be sure that it
will work properly with your
vehicle's wiring system. Because
there are so many modifications
that can be made for many
different bodies and accessories,
GM cannot take responsibility for
any changes made. Such
changes may not be covered by
your GM Warranty. Have the work
done by an experienced electrical
technician. All wiring must be properly
protected by fuses, etc. and must
be routed properly so that it will
not be cut, pinched or rubbed by
other parts of the vehicle. Do not
route wiring in areas where it will
be very hot. Be sure not to
overload the vehicle's wiring,
connectors and components. All
added wire must be at least the
same size as the wire being
attached to for proper fuse
protection.
Installation Instructions
–12‐Volt
Accessory Power Supply
1. Disconnect the negative (−)
battery cable at the battery. The
negative (−) battery cable must
be disconnected before the
positive wiring lead is connected
to the power accessory.
2. Locate the power supply harnesses, one under the
instrument panel near the center
of the vehicle, and one within the
driver side rear cargo area jack
stowage compartment. 3. Prepare the wires that are to be
used to connect the power
accessory. Do not remove the
unused wires. Tape unused
wires back in their original
position under the instrument
panel.
4. Complete the wiring installation of the customer added
accessory with additional wire
required for the specific
electrical accessory power
connection. The wire gauge,
3.0 mm² (12 gauge), should be
the same as the wiring of the
installed harness.
5. The ignition must be turned to OFF prior to attaching the cables
to the battery, or serious damage
to the Body Control Module
(BCM) may result.
The windshield wiper switch and
the radio must be turned off
before attaching cables to the
battery.

Black plate (8,1)Chevrolet Tahoe Police and Special Service Packages - 2012
15-8 Special Equipment Options
Enlarged View of the Fuse Block
A. Relays and Circuit Breakers
B. Front of the Vehicle
C. Floor of the Vehicle
D. Glove Box
E. Tab
The following information tells how
to access the vehicle's relay and
breaker center for checking and
replacing breakers. The breaker and relay center is
located behind and above the
instrument panel storage
compartment. Remove contents
from the storage tray. Using the tab
at the back of the compartment,
drop the tray down gently toward
the floor. It will hang from the hinge.
The breaker/relay center is located
above the right rear corner of the
storage compartment. The bracket
is attached to the instrument panel
structure with two screws.
Replace a 30 amp circuit breaker
with GM Part No. 12182117 circuit
breaker, or equivalent. Replace a
relay with a GM Part No. 12193604
relay, or equivalent. Replace a
50 amp circuit breaker with a GM
Part No. 15319848 circuit breaker,
or equivalent.
Reinstall the storage tray into the
compartment by lifting it into the
instrument panel.
Auxiliary Battery Power
Junction Blocks
Two auxiliary power junction blocks
are located within the driver side
rear cargo area jack stowage
compartment. Each junction block is
powered directly from the battery
through a 50 amp circuit breaker for
connection to customer‐furnished
equipment. The two circuit breakers
are located in the breaker/relay
panel forward of the instrument
panel glove box. A maximum load of
50 amps (600 watts) can be
connected to each junction block.
The wiring diagram for this circuit is
shown as part of the diagram for
“Wiring Provisions
–12 Volt Battery
Power”.

Black plate (11,1)Chevrolet Tahoe Police and Special Service Packages - 2012
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.
Call Kerr Industries at 905‐725‐6561
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 (15,1)Chevrolet Tahoe Police and Special Service Packages - 2012
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.

Black plate (16,1)Chevrolet Tahoe Police and Special Service Packages - 2012
15-16 Special Equipment Options
3. The accessory harness is coiltied 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. 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.