2026 GMC SIERRA 3500HD AT4

• StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist
• Hill Descent Control
• Airbags, Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
• Front and Rear Park Assist, ultrasonic
• Bed View Camera camera in the CHMSL to show a view of the cargo bed, display located in infotainment screen, includes Two Trailer Camera Provisions
• Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
• Trailer Camera Provisions and trailer viewing software
• Rear Cross Traffic Alert
• Trailer Side Blind Zone Alert
• Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
• Safety Alert Seat
• Rear Seat Reminder
• Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver
• Seat Belt Adjustable Guide Loops, front row only
• Indicator-Seat Belt WARNING, Rear Seat (Requires Crew Cab or Double Cab model.)
• Buckle to Drive prevents vehicle from being shifted out of Park until driver seat belt is fastened; times out after 20 seconds and encourages seat belt use (Included and only available with (PDI) Sierra HD Pro Safety)

PACKAGE (2)

• X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks
• ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App

MECHANICAL (19)

• Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
• Air filter, heavy-duty
• Air filtration monitoring
• Transfer case, two-speed active electronic Autotrac with push button control
• Auto-locking rear differential
• Four wheel drive
• 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.)
• Trailer brake controller, integrated
• Recovery hooks, Red
• Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
• Skid Plates protect the oil pan, front axle and transfer case
• Suspension, Off-Road includes twin-tube shocks
• Steering, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
• Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
• Brake lining wear indicator
• Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)

EXTERIOR (24)

• Tire, spare LT275/70R18 all-terrain, blackwall
• Single Rear Wheels
• Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
• Bumper, front, body-color lower
• Bumper, rear body-color with bumper CornerSteps
• CornerStep, rear bumper
• Bed Step, Black integrated on forward portion of bed on driver and passenger side
• Moldings, beltline, Black
• Wheelhouse liners, rear
• Bedliner, Spray-on Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (Available with Ship Thru code (SQE), (TCE) or (TCH), not available with any other Ship Thru code.)
• Cargo tie downs (12), fixed, rated at 500 lbs per corner
• Grille, Gloss Black header and grille insert bars with Black chrome accents
• Fog lamps, LED
• Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
• 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 bed activated with switch on center switch bank or key fob
• Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm])
• Mirror caps, high gloss Black
• Wipers, front rain-sensing
• Glass, deep-tinted
• Door handles, body-color
• Tailgate, GMC MultiPro Tailgate with six functional load/access features. NOTE: Auto release can be disabled if ball hitch is installed. See Owner's manual for details
• Tailgate and bed rail protection caps, top
• Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light

INTERIOR (26)

• Seat adjuster, driver 10-way power including lumbar
• Seat adjuster, passenger 10-way power including lumbar
• Seat, Up-level Rear with Storage Package, 60/40 folding bench for Crew Cab models includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width underseat storage, (includes child seat top tether anchor)
• Seats, heated second row outboard seats
• Driver memory, recalls driver "presets" for power driver seat and outside mirrors
• Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
• Floor covering, color-keyed carpeting
• Steering wheel, wrapped
• Steering wheel, heated
• Steering column, manual Tilt-Wheel and telescoping
• Steering wheel audio controls
• Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display
• GMC Premium information Display- 13.4" diagonal Multicolor touch screen
• Exterior Temperature Display located in radio display
• Compass, located in instrument cluster
• Window, power front, drivers express up/down
• Remote vehicle starter system
• Adaptive Cruise Control
• Theft-deterrent system, unauthorized entry
• Wireless Charging
• Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
• USB ports, (2) charge-only, rear
• Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
• Air conditioning, dual-zone automatic climate control
• Air vents, rear
• Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mounted