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Axxess AX-TGM3 T-harness wire harness for GM Chevy 2014-2015

Axxess Technologies

Axxess AX-TGM3 Remote Start T-harness GM Chevy 2014-2015 car electronics accessory

SKU CH-MY7Z-HNJ5A

Plug-in T-harness adds remote-start capability to 2014-2016 Chevy Silverado, Suburban, Tahoe and GMC Sierra, Yukon models

  • TypeWire Harness
  • Plug-and-play installation with T-harness design
  • Fits GM Chevrolet Silverado 1500 2014-2016 models
  • Compatible with GMC Sierra 2500 2015-2016 trucks
  • Supports Chevrolet Suburban and Tahoe 2015 SUVs
  • Works with GMC Yukon 2015 for remote start

Vehicle-Specific T-Harness

The Axxess AX-TGM3 is a plug-in wire harness that connects an aftermarket remote-start module to the factory wiring of compatible GM trucks and SUVs. It eliminates the need to cut or splice original cables, preserving the vehicle's electrical integrity. Installers and owners of listed 2014-2016 models can add remote-start capability without altering the OEM loom.

Factory-Match Connectors and Secure Routing

Each connector is moulded to match the original terminal layout on 1500, 2500 and 3500 series pickups as well as Suburban, Tahoe and Yukon models from 2014 through 2016. The T-harness plugs inline between the vehicle harness and the target module, locking with the same retention clips used by the factory. This design prevents loose pins, simplifies troubleshooting and allows the assembly to be routed alongside existing wiring bundles.

Passive Operation With No Added Load

The harness contains no active electronics, so it draws no current and generates no heat of its own. Signal paths are straight-through copper conductors sized to the factory specification, meaning voltage drop remains negligible and the vehicle's existing fuses protect the circuit. Because there are no relays, processors or moving parts, the installation adds no audible noise and imposes no extra demand on the charging system.

Highlights

  • Plug-and-play installation with T-harness design
  • Fits GM Chevrolet Silverado 1500 2014-2016 models
  • Compatible with GMC Sierra 2500 2015-2016 trucks
  • Supports Chevrolet Suburban and Tahoe 2015 SUVs
  • Works with GMC Yukon 2015 for remote start

Specifications

TypeWire Harness

Questions about this item

What wiring interface does the AX-TGM3 T-harness use to connect the remote-start module to the vehicle?

The AX-TGM3 plugs directly into the factory wiring harness of 2014-2016 GM trucks and SUVs, carrying power, ground, ignition and data signals between the remote-start module and the vehicle without cutting any original wires.

What physical space or mounting points are required to install this T-harness in a 2015 Silverado 1500?

The harness routes behind the dash and connects to the factory connector at the BCM location; no brackets, screws or extra clearance are needed beyond the existing wiring cavity.

How is the AX-TGM3 installed, and which step do installers most often get wrong?

Disconnect the battery, unplug the factory connector at the BCM, insert the T-harness in-line, then reconnect the battery; the step most often missed is leaving the battery connected while plugging in the harness, which can trigger a security lockout.

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