AUDIO SYSTEM, 13.4 DIAGONAL PREMIUM GMC INFOTAINMENT SYSTEM WITH GOOGLE BUILT IN APPS SUCH AS NAVIGATION AND VOICE ASSISTANCE, INCLUDES COLOR TOUCH-SCREEN, MULTI-TOUCH DISPLAY, AM/FM STEREO Bluetooth streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phones (STD) ,ENGINE, 6.2L ECOTEC3 V8 (420 hp [313 kW] @ 5600 rpm, 460 lb-ft of torque [624 Nm] @ 4100 rpm); featuring Dynamic Fuel Management (Requires (NPP) Dual, sport-mode active exhaust enabled.) ,TRANSMISSION, 10-SPEED AUTOMATIC WITH ELECTRONIC PRECISION SHIFT, ELECTRONICALLY CONTROLLED with overdrive, and tow/haul mode and steering column paddle shifters. Includes Cruise Grade Braking and Powertrain Grade Braking (Included and only available with (L87) 6.2L EcoTec3 V8 engine.) ,LPO, MULTIPRO AUDIO SYSTEM BY KICKER (dealer-installed) *No Longer Factory Orderable, See Dealer for Current Availability* ,LPO, OFF-ROAD HIGH CLEARANCE STEPS (dealer-installed) (Not available with (ULV) AT4X AEV Edition. Not available with any other RPO or LPO assist step.)