The Axxess AXDI-GM44 is a vehicle-specific wiring interface designed to simplify aftermarket radio installations in select 2011–2020 General Motors vehicles. This interface allows you to replace the factory radio while retaining important OEM features, including door chimes, audible safety warnings, retained accessory power (RAP), and other factory functions. Its plug-and-play design reduces installation time and eliminates the need for extensive vehicle wiring modifications. Key Features Allows installation of an aftermarket radio in select GM vehicles Retains factory door chimes and audible safety warnings Maintains Retained Accessory Power (RAP) functionality Provides accessory power output for aftermarket radios Retains factory warning tones and alerts Plug-and-play installation for faster setup Compatible with most aftermarket single-DIN and double-DIN radios Designed to integrate seamlessly with the vehicle's factory electrical system Vehicle Compatibility Fits select 2011–2020 GM vehicles, including: Chevrolet Silverado Chevrolet Colorado Chevrolet Express GMC Sierra GMC Canyon GMC Savana Buick and Cadillac models with compatible factory radio systems Vehicle compatibility varies by year, trim level, and factory audio configuration. Verify application before purchase. Specifications Part Number: AXDI-GM44 Product Type: Radio Replacement Wiring Interface Chime Retention: Yes Safety Warning Retention: Yes Retained Accessory Power (RAP): Yes Accessory Output: Yes Installation Type: Plug-and-play What's Included AXDI-GM44 interface module Vehicle-specific wiring harness Installation instructions