
Black plate (9,1)Chevrolet Tahoe Police and Special Service Packages - 2012
Special Equipment Options 15-9
The two junction blocks are
connected to coiled 1.5 m (5 ft)
branches of the rear body harness
and fastened near the jack.
Mounting of the junction blocks can
be at customer‐selected rear cargo
area locations permitted by the
branch harness length and using
customer‐furnished mounting
hardware.
The junction blocks should not be
attached to the interior trim plastic
components without appropriate
backing hardware to the mounting
bolts.
To connect the customer-furnished
equipment at the junction blocks,
use the following steps:
1. Disconnect the negative (−)battery cable.
2. Connect the customer-furnished equipment positive leads to the
junction block terminals and
tighten to 15 N·m (11 lb ft).
The ignition must be turned off
and the vehicle vacated prior to
connecting the negative (−)
battery cable to the battery. 3. Reconnect the negative (−)
battery cable to the battery.
Torque the bolt to 5 Y
(3.6 lb ft).
4. Set the time on the clock and radio pushbuttons as needed.
See “Introduction” in the
Infotainment section of the
owner manual for more
information.

Black plate (12,1)Chevrolet Tahoe Police and Special Service Packages - 2012
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 (14,1)Chevrolet Tahoe Police and Special Service Packages - 2012
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 (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.

Black plate (18,1)Chevrolet Tahoe Police and Special Service Packages - 2012
15-18 Special Equipment Options
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 (24,1)Chevrolet Tahoe Police and Special Service Packages - 2012
15-24 Special Equipment Options
Wiring Provisions Front
Speakers - SEO WX7
About 165 cm (65 in) of auxiliary
speaker wire is run from the
instrument panel radio connector
and is coiled under the center of the
instrument panel. The wiring permits
the connection of front door
speakers to customer-installed
communication equipment.Radio outputs from the front
speakers are sent to the rear
speakers to maintain the required
open door/key in the ignition
reminder chime
Electrical Connections
1. Disconnect the negative (−)
battery cable at the battery.
2. Remove the tape from the wire coiled under the instrument
panel to uncoil it.
3. Using proper electrical connectors, connect the wires
for the left front audio output of
the customer-installed
communication device. The left
front positive wire is tan and the
left front negative wire is gray.
4. Using proper electrical connectors, connect the wires
for the right front audio output of
the customer-installed
communication device. The right
front positive wire is light green
and the right front negative wire is dark green. The electrical
impedance of each speaker
installed is 10 ohms.
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.
5. The ignition must be turned off and the vehicle must be vacated
prior to attaching the cable to the
battery. Connect the negative (−)
battery cable to the battery and
tighten the bolt to 5 N·m
(3.7 lb ft).
6. Set the time on the clock and radio pushbuttons as needed.
See “Introduction” in the
Infotainment section of the
owner manual for more
information.

Black plate (1,1)Chevrolet Tahoe Police and Special Service Packages - 2012
INDEX i-1
A
AirbagsDeployment Diagrams . . . . . . . . . 3-4
Questions and AnswersAbout Airbags and
Specialty Law
Enforcement Vehicles . . . . . . . . 3-1
Auxiliary Available Option . . . . . . . . . . . . . . 15-8
Auxiliary Battery Power Junction Blocks, Available
Option . . . . . . . . . . . . . . . . . . . . . . . . 15-8
B
Battery
Dual System - SEO 6Y6 . . . . 15-10
Power Junction Blocks . . . . . . . 15-8
Wiring Provisions for12-Volt Power Supply . . . . . . . 15-2
C
Canadian Vehicle Owners . . . . . . . . . ii
Capacities andSpecifications . . . . . . . . . . . . . . . . 12-2
Circuit Wiring Provisions forHorn/Siren - SEO 6J4 . . . . . 15-20
Cluster, Instrument . . . . . . . . . . . . . 5-2
Customer-installed Equipment, Notices . . . . . . . . . . . 3-3
D
Deployment Diagrams . . . . . . . . . . 3-4
Door LocksInactive Rear - SEO 6N6 . . . 15-14
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . 5-3
Driving
Vehicle Load Limits . . . . . . . . . . . . 9-1
Dual Battery System - SEO 6Y6 . . . . . . . . . . 15-10
E
Equipment GroundingStuds - Rear
Compartment . . . . . . . . . . . . . . . 15-10
Equipment Grounding Studs, Rear
Compartment . . . . . . . . . . . . . . . 15-10
Exterior Lamp Controls . . . . . . . . . 6-1
Exterior Lamp Emergency Flashing
System - SEO 6J7 . . . . . . . . . . 15-11
F
Fast Idle System . . . . . . . . . . . . . . . . 9-5
Flasher, WiringProvisions - SEO 6J3 . . . . . . . 15-22
Floor Mats . . . . . . . . . . . . . . . . . . . . . 10-2

Black plate (2,1)Chevrolet Tahoe Police and Special Service Packages - 2012
i-2 INDEX
G
GaugesOdometer . . . . . . . . . . . . . . . . . . . . . . 5-3
Speedometer . . . . . . . . . . . . . . . . . . 5-3
Groundig Studs, Rear Compartment . . . . . . . . . . . . . . . 15-10
Grounding Straps
Radio Suppression . . . . . . . . . 15-10
H
Horn/Siren, WiringProvisions - SEO 6J4 . . . . . . . 15-20
I
Idle SystemFast . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Inactive Rear Door Handles - SEO 6B2 . . . . . . . . . 15-14
Inactive Rear Door Locks - SEO 6N6 . . . . . . . . . . . 15-14
Inactive Rear Door Windows - SEO 6N5 . . . . . . . . 15-14
Instrument Cluster . . . . . . . . . . . . . . 5-2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . ii
K
Keys Single Key Random CodeSystem . . . . . . . . . . . . . . . . . . . . . . . 2-1
L
LampsExterior Controls . . . . . . . . . . . . . . . 6-1
Exterior EmergencyFlashing
System - SEO 6J7 . . . . . . . . .15-11
Vehicle Grille Wiring
Provisions - SEO 6J3 . . . . . 15-22
Lights Wiring Provisions forEmergency
Vehicle - SEO TRW . . . . . . . 15-15
M
Monitor System, Tire
Pressure . . . . . . . . . . . . . . . . . . . . . 10-1