PACKAGE ProGrade Trailering System includes (PZ8) Hitch Guidance with hitch view and (U1D) In-vehicle Trailering App (All features of (ZL6) Pro Grade Trailering are included within SLT / AT4 / Denali however the code of "ZL6" is not utilized for these PEGS and therefore will not be included on any ordering materials or within any systems.) --- MECHANICAL Rear axle, 3.23 ratio Pickup bed GVWR, 7000 lbs. (3175 kg) (Requires Crew Cab model with (L84) 5.3L EcoTec3 V8 engine or (L87) 6.2L EcoTec3 V8 engine. Requires Double Cab model with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.) Air filter, high-capacity Automatic Stop/Start Hill Descent Control Transfer case, two-speed, electronic Autotrac with push button control Suspension, Off-Road with 2" factory installed lift and monotube shocks Cooling, external engine oil cooler (Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.) Cooling, auxiliary external transmission oil cooler (Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.) Alternator, 170 amps (Included and only available with (L84) 5.3L EcoTec3 V8 engine or (L87) 6.2L EcoTec3 V8 engine. Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.) Battery, heavy-duty 730 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power (Included and only available with (L84) 5.3L EcoTec3 V8 engine, (L3B) 2.7L Turbo engine and (L87) 6.2L EcoTec3 V8 engine.) Frame, fully-boxed, hydroformed front section Trailer brake controller, integrated Skid Plates Cargo tie downs (12), fixed, rated at 500 lbs per corner Capless Fuel Fill Exhaust, dual with premium tips Exhaust, aluminized stainless-steel muffler and tailpipe --- EXTERIOR Wheel, 17" x 8" (43.2 cm x 20.3 cm) full-size, steel spare Wheelhouse liners, rear Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door Bumper, front, body-color lower (Front bumper color will be high gloss black.) Bumper, rear body-color with corner steps CornerStep, rear bumper Grille (Body-color surround with high gloss Black mesh and Black chrome inserts.) Taillamps, LED signature taillight with LED stop and reverse light Mirror caps, high gloss Black Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel LED Cargo Area Lighting located in cargo box activated with switch on center switch bank or key fob Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light Tailgate and bed rail protection caps, top Door handles, body-color --- ENTERTAINMENT Audio system feature, 6-speaker system USB ports, dual, charge-only (2nd row) --- INTERIOR Console, floor mounted with cup holders, cell phone storage, power cord management, hanging file holder capability Floor covering, color-keyed carpeting Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure Driver Information Center, 4.2" diagonal color display includes driver personalization In-vehicle Trailering App includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder and trailer electrical diagnostics (Includes trailer tire pressure monitoring alert ONLY when (PTT) trailer tire pressure monitor system is factory ordered and sensors are installed) Compass, located in instrument cluster Exterior Temperature Display, located in radio display Brake lining wear indicator Steering column, lock control, electrical Air vents, rear Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet) Power outlet, box mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet) Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted --- SAFETY GMC Connected Access with 10 years of standard