ACDelco 15785406 GM Original Equipment Theft Deterrent Passkey Module Product Features Deter vehicle theft GM-recommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function Product Specifications Brand: ACDelco Item Weight: 0.3 ounces Product Dimensions: 4.1 x 2.1 x 2.1 inches Item model number: 15785406 Manufacturer Part Number: 15785406 OEM Part Number: 15785406 Shipping Weight: 0.8 ounces Domestic Shipping: Item can be shipped within U.S. Date First Available: December 16, 2008 Why Buy From JandJ Ultra? Highly Trusted Seller Over 99.7% Positive Feedback FAST Shipping and Tracking HUGE Discounts Excellent Returns Policy The BEST Customer Service Shipping & Returns We Ship International! 14 Day Money Back Return Policy Items Ship within 24-48 Hours Product Description ACDelco GM Original Equipment Anti-Theft Control Modules are one part of the vehicle’s theft deterrent system. When armed, the system is designed to deter vehicle theft by performing one or more of the following: pulsing the horns and exterior lamps when unauthorized vehicle entry is detected, or prevent starting of the engine without an authenticated ignition key. This module may manage the system functions independently or in conjunction with other modules and components within the vehicle. Thank You For Your Business!