Preloaded module & T-Harness combo for Cadillac, Chevrolet & GMC Full Size vehicles.The EVO-GMT4 is the ultimate Factory Fit, ALL-IN-ONE data immobilizer bypass, door lock, alarm & remote start interface with T-Harness combo module for 2007+ Cadillac, Chevrolet & GMC full size vehicles. It raises the standard of hassle-free installation convenience to a whole new level. It uses a multiple bus architecture with 10 separate communication ports that provide more complete functionality on every supported vehicle.THIS PRODUCT MUST BE SOLD, INSTALLED AND SUPPORTED BY A PROFESSIONAL.
Parts included :
- 3 x On-board LEDs for simplified programming and diagnostics.
- 1 x Factory Fit T-Harness for easy install.
- 1 x 2-way datalink port for data-to-data (RS-232) communication with compatible remote-starters and security-systems. 
- 1 x 20 Pin general purpose plug for wire-to-wire connections with non-datalink equipped remote-starters and security-systems.
- Self-Learning algorithm automatically detects the vehicle during programming and adjusts accordingly.
- 1 x EVO-ALL control module 
- 1 x Warning label. 
- 1 x 4 Pin Fortin 2-way data-link harness. 
- 1 x Factory Fit T-Harness. 
-  A firmware update is required.
-  Using the 2-way datalink port with an equipped remote-starter, security-system or RF-KIT greatly simplifies installation.
-  Updated firmware and installation guides are posted on a regular basis. We recommend that you update this module to the latest firmware and download the latest installation guide(s) prior to the installation of this product.
-  Secure Clip Harness.