OFFICIAL GM REFERENCE
2024 Chevrolet Tahoe 9C1 GM Upfitter Guide
2024 Tahoe 9C1 PPV
71 Pages
GM Police Package
Official 2024 Chevrolet Tahoe 9C1 Police Package specification and upfitter reference.
The guide includes vehicle specifications, standard police-package features, upfitter wiring
provisions, wiring diagrams, electrical information, lighting provisions, airbag zones,
loading information, and other Tahoe PPV technical references.
GM notes that the publication is intended as a source of basic information and may not be
updated during the model year. Installers should verify current vehicle and manufacturer
documentation before making wiring or equipment changes.
FEDERAL SIGNAL PATHFINDER
Chevrolet Tahoe PPV Headlight / Tail Light Relay Diagram
12V SPDT (5-Pin) Changeover Relay
Federal Signal Pathfinder Smart Siren
Headlight / Tail Light Control
This relay diagram is used to switch a Chevrolet Tahoe PPV headlight or taillight circuit
from the normal factory BCM/lighting circuit to the Federal Signal Pathfinder flash output
when activated. It is intended for applications where the Pathfinder smart siren controls
warning-light flash behavior through a 5-pin SPDT relay.
Terminal Function Summary
| Terminal | Function |
|---|
| 86 | Relay on from Pathfinder (12V output) |
| 85 | Ground |
| 87 | Pathfinder flash output (to lights) |
| 87a | BCM side or HL/TL side (normally connected) |
| 30 | HL or TL side (from vehicle) |
How It Works
- When the Pathfinder sends 12V to terminal 86, the relay coil is energized.
- Terminal 30 (vehicle headlight or taillight feed) switches from 87a, the normal circuit path, to 87, the Pathfinder flash output.
- This allows the Federal Signal Pathfinder smart siren to send the flash signal to the selected light circuit.
Application
- Chevrolet Tahoe PPV
- Headlight flasher
- Taillight flasher
Installation Notes
- Use a quality 12V SPDT relay; 30/40A is commonly recommended.
- Ensure all grounds are secure and properly terminated.
- Verify each connection with a multimeter or test light before finalizing the installation.
- Confirm the exact vehicle lighting circuit and Pathfinder output behavior before use.
This reference is intended for Tahoe applications using a Federal Signal Pathfinder smart siren to control headlight or taillight flash functions. Always verify model-year circuit behavior and equipment compatibility before installation.
RELAY / K9 INTEGRATION
Chevrolet Tahoe K9 Unit Lock Relay Diagram
12V 5-Pin Relay
Door Lock Trigger
Chevrolet Tahoe PPV
This relay configuration is designed to interface a K9 unit lock trigger with the Chevrolet Tahoe door lock system. In normal operation, the lock motor remains connected to the BCM through terminal 87a. When the K9 unit sends a trigger to terminal 85, the relay energizes and switches terminal 30 from 87a to 87, grounding the lock motor circuit and activating the lock function.
Terminal Function Chart
| Terminal | Function |
|---|
| 85 | Lock trigger from K9 unit |
| 86 | Ground |
| 87 | Ground |
| 87a | Lock BCM |
| 30 | Lock motor |
Relay De-Energized — Normal Operation
With the relay coil de-energized, terminal 30 remains connected to terminal 87a. This keeps the lock motor wire connected to the BCM so the factory door-lock system continues to operate normally.
Relay Energized — K9 Lock Trigger Active
When the K9 unit applies a trigger to terminal 85, the relay coil energizes. The contact switches from 87a to 87, disconnecting the BCM lock circuit and connecting terminal 30 to ground through terminal 87. This activates the lock motor circuit.
Installation Notes
- Verify the correct lock motor and BCM lock circuits for the exact model year before making final connections.
- Confirm that the K9 controller output is compatible with the relay trigger arrangement.
- Use automotive-grade wiring, terminals, protection and insulation.
- Function-test both the K9-triggered lock command and normal factory lock operation before final reassembly.
Technical references should be verified against current OEM and equipment-manufacturer documentation before installation. Model-year differences may change circuit locations, colors or behavior.
COMING NEXT
Chevrolet Tahoe K9 Unit Unlock Relay
Reserved for the matching K9 unlock relay diagram and terminal chart.
COMING NEXT
K9 Heat Alarm Integration
Reserved for heat alarm inputs, outputs, vehicle-state logic and safety notes.
COMING NEXT
K9 Door Release / Door Pop
Reserved for release actuator logic, relay integration and controller trigger notes.
SAFETY
Fail-Safe & Verification Notes
Any K9 door, lock, release or heat-alarm modification should be tested for normal factory operation, K9 controller operation, loss-of-power behavior and unintended activation before the vehicle is returned to service.
