MECHANICAL Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.) GVWR, 10,250 lbs. (4649 kg) (Included and only available with TC20753 model and (L8T) 6.6L V8 gas engine with 18" or 20" wheels, or TK20903 model and (L8T) 6.6L V8 gas engine with 17" wheels.) Transfer case, two-speed, electronic shift with push button controls (Requires 4WD models.) Cooling, external engine oil cooler Cooling, auxiliary external transmission oil cooler Air filter, heavy-duty Air filtration monitoring Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.) Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.) Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section Suspension Package (Not available with (X31) Off-Road Package.) Brake lining wear indicator Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine. Not included with (ZW9) pickup bed delete.) --- EXTERIOR Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door (Deleted with (ZW9) pickup bed delete.) Bumper, front chrome lower Bumper, rear chrome with bumper CornerSteps CornerStep, rear bumper Bed Step, Black integrated on forward portion of bed on driver and passenger side (Not available on (ZW9) pickup bed delete.) Cargo tie downs (12), fixed rated at 500 lbs per corner Moldings, beltline, Black Grille (Chrome surround with Black mesh.) Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel LED tail and incandescent stop, turn and reverse light Mirrors, outside high-visibility vertical trailering lower convex mirrors, manual-folding/extending (extends 3.31" [84.25mm]), molded in Black Glass, solar absorbing, tinted Door handles, Black grained Tailgate, locking utilizes same key as ignition and door (Included and only available with (QK1) standard tailgate. Deleted with (ZW9) pickup bed delete.) Tailgate, standard (Deleted with (ZW9) pickup bed delete.) Tailgate, gate function manual, no lift assist (Deleted with (ZW9) pickup bed delete.) Tailgate and bed rail protection caps, top (Deleted with (ZW9) pickup bed delete.) --- ENTERTAINMENT Audio system feature, 2-speakers (Requires Regular Cab model.) --- INTERIOR Seat adjuster, driver 4-way manual Seat adjuster, passenger 4-way manual Steering wheel, urethane Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure Driver Information Center, 3.5" diagonal monochromatic display Exterior Temperature Display, located in radio display Windows, manual (Standard on Regular Cab model. Crew Cab and Double Cab models have power windows standard.) Door locks, manual (Requires Regular Cab model.) Mirror, inside rearview, manual tilt Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted --- SAFETY Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching (Deleted with (ZW9) pickup bed delete.) --- Differential:Auto-locking rear differential