PAC AP4-GM61 AmpPro Car Audio Amplifier Interface for 2014-19 GM w/ MOST50

BRAND NEWPAC AUDIO AP4-GM61Car Audio Amplifier Interface for Select 2014-2019 GM Vehicles with MOST50Key Features:  Upgrade solution for factory, fixed level, data-bus controlled sound systems Time-saving design, prevents need for summing and audio correction devices Variable volume, fade, balance, bass, mid, and treble audio settings Retains OnStar, Bluetooth, navigation, safety systems, and all warning chimes Front, rear, sub , and center channel preamp outputs (5 volt RMS) Provides full range, flat audio output for a solid audio foundation Customized OE bass, mid, and treble center frequency selection Plug-n-play installation Remote sub level controller included Optional TOSLINK optical output included Dimensions: 8.5 x 5.8 x 2.1 inches Weight: 1lb Includes:  AmpPRO module Harness Bass knob Knob harness Manual