MECHANICAL Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine. Not available with (L5P) Duramax 6.6L Turbo-Diesel V8 engine.) Durabed, pickup bed GVWR, 11,500 lbs. (5216 kg) with single rear wheels (Included and only available with model CK30943 model and (L8T) 6.6L V8 gas engine or CC30903 and (L5P) Duramax 6.6L Turbo-Diesel V8 engine. Requires single rear wheels.) Air filter, heavy-duty Air filtration monitoring Transfer case, two-speed electronic shift with push button controls (Requires 4WD models.) Cooling, external engine oil cooler Cooling, auxiliary external transmission oil cooler 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 Brake lining wear indicator Capless Fuel Fill (Requires (L8T) 6.6L V8 gas engine. Not available with (ZW9) pickup bed delete.) --- EXTERIOR Single Rear Wheels Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door (Deleted with (ZW9) pickup bed delete.) Bumpers, front, Black Bumpers, rear, Black CornerStep, rear bumper BedStep, Black integrated on forward portion of bed on driver and passenger side (Deleted when (ZW9) pickup bed delete is ordered.) Moldings, beltline, Black Cargo tie downs (12), fixed, rated at 500 lbs per corner (Deleted with (ZW9) pickup bed delete.) Front grille bar with "CHEVROLET" molded in Black includes Black mesh inserts with small Gold bowtie emblem. Taillamps, with incandescent tail, stop and reverse lights (Note: Trucks equipped with dual rear wheels will feature LED signature tail and stop lamps, with incandescent reverse lamp.) Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel Mirrors, outside high-visibility vertical trailering lower convex mirrors, manual-folding/extending (extends 3.31" [84.25mm]), molded in Black Mirror caps, Black Glass, solar absorbing, tinted Door handles, Black grained Tailgate, standard (Deleted with (ZW9) pickup bed delete.) Tailgate and bed rail protection cap, top Tailgate, locking, utilizes same key as ignition and door (Upgraded to (QT5) EZ Lift power lock and release tailgate when (PCV) WT Convenience Package is ordered. Not available with (ZW9) pickup bed delete.) (Upgraded to (QT5) EZ Lift power lock and release tailgate when (ZLQ) WT Fleet Convenience Package or (PCV) WT Convenience Package is ordered. Not available with (ZW9) pickup bed delete.) Tailgate, gate function manual, no EZ Lift (Deleted with (ZW9) pickup bed delete.) --- ENTERTAINMENT Audio system feature, 6-speaker system (Requires Crew Cab or Double 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, power rear, express down (Not available with Regular Cab models.) Air vents, rear, heating/cooling (Not available on Regular Cab models.) 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 trailer alignment for hitching (Deleted with (ZW9) pickup bed delete.) Rear Seat Reminder (Requires Crew Cab or Double Cab model.) Seat Belt Adjustable Guide Loops front row only (Included and only available on Crew Cab and Double Cab models. Not available with (ZW9) pickup bed delete.) --- Differential:Auto-locking rear differential