ENGINE, 6.2L ECOTEC3 V8 with Dynamic Fuel Management, Direct Injection and Variable Valve Timing, includes aluminum block construction (420 hp [313 kW] @ 5600 rpm, 460 lb-ft of torque [624 Nm] @ 4100 rpm) (STD) ,TRANSMISSION, 10-SPEED AUTOMATIC electronically controlled with overdrive, includes Traction Select System including tow/haul (STD) (Standard with (L87) 6.2L EcoTec3 V8 engine only.) ,SUN AND TOW PACKAGE includes (C3U) power sunroof and (NHT) Max Trailering Package (Requires 4WD when (LZ0) Duramax 3.0L Turbo-Diesel engine is ordered. Not available with (PDM) High Country Deluxe, (PDG) Technology and Entertainment Package or any 24 RPO or LPO wheels.) ,AUDIO SYSTEM, 17.7 DIAGONAL ADVANCED COLOR LCD DISPLAY with Google built-in compatibility (select service plan required, terms and limitations apply), including navigation capability, connected apps, personalized profiles for each drivers settings, Natural Voice Recognition and Phone Integration (STD) ,ADVANCED TRAILERING PACKAGE includes (UKW) Blind Zone Steering Assist with Trailering, (PZ8) Hitch View and (UET) Smart Trailer Integration Indicator (Included and only available with (NHT) Max Trailering Package.)