The 2024 GMC Sierra 2500HD AT4 is a commanding heavy-duty truck that blends extreme capability, premium craftsmanship, and off-road confidence. Built for those who demand uncompromising strength without sacrificing refinement, the AT4 stands tall with aggressive styling, advanced trailering technology, and luxurious comfort, ready for the toughest jobs and boldest adventures. Performance & Capability Engine: Duramax® 6.6L V8 Turbo Diesel delivering immense torque and proven heavy-duty performance Transmission: Allison® 10-speed automatic transmission engineered for strength, smooth shifting, and towing confidence Drivetrain: Autotrac® 4-Wheel Drive with two-speed transfer case for commanding traction on any terrain Axle Ratio: 3.42 rear axle optimized for heavy towing and load management Off-Road Hardware: Skid plates, automatic locking rear differential, and hill descent control for rugged terrain Suspension: AT4 off-road suspension tuned for stability, control, and durability Trailering & Work-Ready Strength Max Trailering Capability with gooseneck/5th wheel prep package Integrated Trailer Brake Controller and Hitch Guidance with Hitch View In-Vehicle Trailering App for real-time trailer status and diagnostics Trailer Side Blind Zone Alert and Trailer Camera Provisions for enhanced visibility Engine Exhaust Brake and heavy-duty cooling systems for confident downhill control MultiPro™ Tailgate offering six functional positions for loading, work, and access Winter & All-Weather Comfort Heated & Ventilated Front Seats for year-round comfort Heated Rear Outboard Seats and Heated Steering Wheel for cold-weather drives Dual-Zone Automatic Climate Control maintaining personalized cabin temperatures Remote Vehicle Start and Push-Button Start for added convenience Engine Block Heater and Winter Grille Cover for dependable cold-weather operation Premium All-Weather Floor Liners for rugged interior protection Interior Comfort & Convenience Premium Leather-Appointed Front Bucket Seats with power adjustment and memory settings Power Sliding Rear Window and Rear Seat Storage Package for added versatility Wireless Charging Pad and multiple USB ports throughout the cabin Power Sunroof bringing natural light and open-air feel Refined Jet Black/Kalahari interior with bold AT4 accents Technology & Connectivity 13.4" GMC Premium Infotainment Touchscreen with Google Built-In and Navigation 12" Digital Driver Information Display with customizable views Bose® Premium Audio System delivering rich, immersive sound Head-Up Display projecting key driving and trailering data Wireless Apple CarPlay® & Android Auto™ for seamless smartphone integration Safety & Driver Assistance Sierra HD Pro Safety suite for enhanced driver confidence Forward Collision Alert with Automatic Emergency Braking Lane Departure Warning and Following Distance Indicator Front & Rear Park Assist and HD Surround Vision for precision maneuvering Rear Cross Traffic Alert and Front Pedestrian Braking Teen Driver Mode and Buckle-to-Drive for added safety awareness Exterior Styling & Off-Road Presence 20" Black Aluminum Wheels wrapped in all-terrain tires for aggressive capability LED Headlamps, Fog Lamps, Roof Marker Lamps, and Cargo Bed Lighting Red Front Recovery Hooks and High-Clearance AT4 steps for off-road readiness Spray-On Bedliner and Bed-Mounted 120V Power Outlet for worksite practicality Sterling Metallic exterior with bold AT4 detailing and muscular stance  Whether you’re hauling heavy equipment, towing massive loads, or conquering off-road terrain, the 2024 GMC Sierra 2500HD AT4 delivers relentless strength, advanced technology, and premium refinement. It’s a heavy-duty truck built to dominate demanding jobs, and do it in unmistakable AT4 style.

AMVIC Licensed Dealer

*Every reasonable effort is made to ensure the accuracy of the information shown. The Standard Equipment listed is provided at the time of the manufacture and may not match the exact vehicle displayed. Please confirm with a sales representative the accuracy of this information.

Safety Equipment

• Front Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
• Automatic Emergency Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
• StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
• Daytime Running Lamps, LED signature lighting
• LED Signature DRL's
• 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
• OnStar and GMC Connected Services capable (Terms and limitations apply. See onstar.ca or dealer for details.)
• Front and Rear Park Assist, ultrasonic
• HD Surround Vision provides the driver with an overhead view of the scene around the vehicle on a centre stack display. Includes front camera washer.
• 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
• Trailer Camera Provisions and trailer viewing software
• Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
• Hitch Guidance with Hitch View with image adjustment, Pan/Zoom/Tilt
• Forward Collision Alert (Included and only available with (PDI) Sierra HD Pro Safety.)
• Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
• Lane Departure Warning (Included and only available with (PDI) Sierra HD Pro Safety.)
• Rear Seat Belt Indicator
• Rear Cross Traffic Alert
• Trailer Side Blind Zone Alert
• Seat Belt Adjustable Guide Loops, front row only
• 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.)
• Safety Alert Seat
• Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behaviour. 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
• Tire Pressure Monitoring System, auto learn includes Tire Fill Alert (does not apply to spare tire)
• Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
• 3 Years of OnStar Remote Access. The OnStar Remote Access Plan gives you simplified remote control of your properly equipped vehicle and unlocks a variety of great features in your myGMC mobile app. See dealer for details. (Does not include emergency or security services. 3 years begins from the date of vehicle delivery. Requires a working vehicle electrical system (including battery), wireless reception and device data connection. See onstar.ca for details and limitations. Features and functionality vary by vehicle. Available on select Apple and Android devices. Device data connection required. Non-refundable and no cash value.)

Interior Equipment

• Seats, front bucket with centre console
• Seat trim, Perforated front Leather
• 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, centre fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)
• Seat adjuster, driver 10-way power including lumbar
• Seat adjuster, passenger 10-way power including lumbar
• Seating, heated driver and front outboard passenger
• Seats, ventilated driver and front passenger
• Seats, heated second row outboard seats
• Driver memory recalls driver "presets" for power driver seat and outside mirrors
• Centre Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
• Floor covering, colour-keyed carpeting
• Premium Floor Liners with removable carpet insert, front
• Premium Floor Liners with removable carpet insert, rear
• Steering wheel, wrapped
• Steering wheel, heated
• Steering wheel audio controls
• Steering column, manual Tilt-Wheel and telescoping
• Driver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital display
• Rear Seat Reminder
• GMC Premium information Display- 13.4" diagonal Multicolour touch screen
• Exterior Temperature Display, located in radio display
• Compass, located in instrument cluster
• Windows, power front, drivers express up/down
• Window, power front, passenger express up/down
• Windows, power rear, express down
• Door locks, power
• Keyless Open and Start includes remote keyless entry
• Remote vehicle starter system
• Cruise control, steering wheel-mounted
• Wireless Charging
• Theft-deterrent system, unauthorized entry
• Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
• USB Ports, 2 (first row) located on console
• USB Ports, 2, Charge/Data ports located inside centre console
• USB ports, (2) charge-only, rear
• Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
• Air vents, rear
• Air conditioning, dual-zone automatic climate control
• Defogger, rear-window electric
• Mirror, inside rearview auto-dimming
• Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
• GMC Connected Access capable (Subject to terms. See onstar.ca or dealer for details.)

Exterior Equipment

• Wheels, 20" (50.8 cm) High Gloss black aluminum wheels 8 spokes
• Tires, LT275/65R20 all-terrain, blackwall
• Tire, spare LT275/70R18 all-terrain, blackwall
• Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
• Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
• Bumper, front, body-colour lower
• Bumper, rear body-colour with bumper CornerSteps
• Bedliner, Spray-on, Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (AT4 logo replaces GMC logo.)
• Bed Step, Black integrated on forward portion of bed on driver and passenger side
• CornerStep, rear bumper
• Cargo tie downs (12), fixed, rated at 500 lbs (226.8 kg) per corner
• Wheelhouse liners, rear
• Mouldings, beltline, Black
• Grille (Gloss Black header and grille insert bars with Black Chrome accents.)
• Headlamps, Animated LED projectors LED turn signals and Daytime Running Lamps
• IntelliBeam, automatic high beam on/off (Included and only available with (PDI) Sierra HD Pro Safety.)
• Fog lamps, LED
• Lamps, cargo area cab mounted integrated with centre 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 centre switch bank or key fob
• Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
• Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger), lower convex mirrors, turn signal indicators, puddle lamps, (U12) perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm]) lighting
• Mirror caps, high gloss Black
• Glass, deep-tinted
• Wipers, front rain-sensing
• Door handles, body-colour
• 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, gate function manual with EZ Lift includes power lock and release, includes hitch area light
• Tailgate and bed rail protection caps, top

Entertainment Equipment

• Audio System, 13.4" diagonal Premium GMC Infotainment System with Google built in apps such as navigation and voice assistance includes colour touch-screen, multi-touch display, AM/FM stereo, Bluetooth streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phones
• SiriusXM enjoy a Platinum Plan trial subscription
• SiriusXM with 360L includes a trial subscription to the Platinum Plan. Experience more channels in the vehicle, a more personalized experience and easier navigation. (Certain features and/or content may not be available unless an active data connection is enabled in the vehicle. Content varies by SiriusXM subscription plan. Features and display may vary by vehicle. All SiriusXM services require a subscription, sold separately by SiriusXM after the trial period. Your SiriusXM service will automatically stop at the end of your trial unless you decide to subscribe. If you decide to continue service after your trial, the subscription plan you choose will continue for an indeterminate term and you will be charged according to your chosen payment method at the then-current rates unless and until you cancel. Taxes apply. Please see the SiriusXM Customer Agreement at siriusxm.ca/terms for complete terms and how to cancel, which includes calling SiriusXM at 1-888-539-7474. All rates, content, and programming are subject to change. SiriusXM uses personal information in accordance with SiriusXM Privacy Policy, available at siriusxm.ca/privacy. SiriusXM Canada Inc. "SiriusXM", the SiriusXM logo, channel names and logos are trademarks of Sirius XM Radio Inc. and are used under license.)
• Bose Sound System, premium 7-speaker system with Richbass woofer
• Bluetooth for phone connectivity to vehicle infotainment system
• Wireless phone projection for Apple CarPlay and Android Auto
• Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.ca or dealer for details.)

Mechanical Equipment

• Engine, 6.6L V8 with Direct Injection and Variable Valve Timing, gasoline (401 hp [299 kW] @ 5200 rpm, 464 lb-ft of torque [629 N-m] @ 4000 rpm)
• Transmission, Allison 10-Speed automatic
• Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
• Pickup bed includes bed assist step
• GVWR, 10,850 lbs. (4921 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18" or 20" wheels.)
• Push Button Start
• Hill Descent Control
• 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
• 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.)
• Trailer brake controller, integrated
• In-Vehicle Trailering App, System includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert when (PTT) trailer tire pressure monitor sensors are installed.)
• Recovery hooks, Red
• Skid Plates protect the oil pan, front axle and transfer case
• Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
• 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

Other Equipment

• X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks
• Sierra HD Pro Safety includes (UEU) Forward Collision Alert, (UE4) Following Distance Indicator, (UKJ) Front Pedestrian Braking, (TQ5) IntelliBeam, (UFL) Lane Departure Warning, (T8Z) Buckle to Drive and (UHY) Automatic Emergency Braking
• Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance
• ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App