This is the Firstech FTI-GMT3 plug and play T-harness, for GM push button start vehicles.
A T-harness plugs in between your vehicle's factory connectors and your remote start module, so most connections are made by pushing plugs together rather than cutting and soldering. It cuts install time considerably and leaves your factory wiring largely as the manufacturer built it.
Check fitment before ordering
GM harness coverage splits by generation, and we stock several. Search your vehicle and we'll show you the complete solution we'd install ourselves, with the correct harness already matched to the module. Or call us on 647-439-4485.