This is a complete one kit for your  2003 GMC SIERRA TRUCK, this includes the alarm system and door lock control module. Our kit also includes the vehicle wiring diagrams and directions to make this truly and "one kit" alarm system for your vehicle. We even include live phone tech support with any issues you may have. 


This Enhanced VIPER Security System is designed to provide superior protection and convenience for your vehicle, integrating some of the most advanced security technologies available today. This system keeps you confidently connected with dual 1-way, 4-button transmitters and an extended range of up to 1/4 mile. The system’s sleek Control Center includes an antenna with an integrated valet switch and LED, while convenience features like remote keyless entry, ignition-controlled door locks, and (2) auxiliary outputs ensure both security and easy access. This system can also be upgraded with VIPER SMARTSTART PRO for smartphone control, making it a comprehensive, user-friendly choice.

This Enhanced VIPER Security System is designed to provide superior protection and convenience for your vehicle, integrating some of the most advanced security technologies available today. This system keeps you confidently connected with dual 1-way, 4-button transmitters and an extended range of up to 1/4 mile. The system’s sleek Control Center includes an antenna with an integrated valet switch and LED, while convenience features like remote keyless entry, ignition-controlled door locks, and (2) auxiliary outputs ensure both security and easy access. This system can also be upgraded with VIPER SMARTSTART PRO for smartphone control, making it a comprehensive, user-friendly choice backed by a limited lifestyle warranty.