Retains all safety warning chimes when factory radio is replaced; Provides 10-min RAP accessory output; Interface can be quickly updated if needed from PAC(R) website using PAC-UP USB adapter; For select nonamplified 29-bit GM(R) LAN v2 Radios with 20-pin & 16-pin harnesses like Chevrolet(R) Silverado 2014, Suburban 2015, Tahoe 2015, GMC(R) Sierra 2014 & Yukon 2015; Includes LCGM51 module, plug & play vehicle connection harness & instruction manual;