Plug & Play 1-Button Remote Start Kit for Sierra & Silverado 2003-2007 Classic - This Kit Offers The Easiest Installation Available On The Market! REMOTE START PACKAGE OVERVIEW - This is the easiest kit you will ever install! A complete Plug & Play 1-Button remote start kit features the Crimestopper RS1 remote start, INTSL DATA & Keyless Bypass Module, custom T-harnesses (pre-wired) so the kit only requires you to make 1 easy connection toground, the rest is plug and play. Includes detailed instruction sheet to assist with the installation in YOUR vehicle. REMOTE START FEATURES - Start your engine and warm or cool your car from the comfort of your home with the push of a button from up to 1500ft from your vehicle. The RS1 system uses (2) ultra-compact extended range 1-button transmitters to operate. You can even unlock your doors by pressing and releasing the start button once the engine is running. When you're ready to drive, just put your key in the ignition and go! This package is a complete 1-Button remote start kit for GMC Sierra & Chevrolet Silverado 2003-2007 Classic Body Style. The kit features the Crimestopper RS1 remote start, INTSL DATA & Keyless Bypass Module, JBS GM12 Ignition T harness (pre-wired) so the kit only requires you to make 1 easy wired connection to the vehicle, the rest is plug and play. Includes detailed instruction sheet to assist with the AVAILABLE OPTION (at additional cost) - Smartphone Interface in YOUR vehicle. PLUG & PLAY INSTALLATION TYPE - This kit is a true Plug & Play kit. The wiring T-Harness was designed to eliminate the need for the wiring connections that typical systems require. The installation of this product will still require the removal of your steering column cover to access the connection points. However the connections are simple plugins. MPC TECHNICAL SUPPORT - A link will be provided to download MPC's exclusive copyrighted step-by-step installation tip sheet made by MPC's professional technicians to help you through the installation process. In addition, your purchase includes technical support. Support tickets can be submitted 24/7 and are answered in the order received, Monday through Friday between 9am to 5pm Arizona time.