Get ready to experience one of the most capable, refined, and aggressively styled heavy-duty pickup trucks on the road today. The 2024 GMC Sierra 2500HD AT4 blends uncompromising off-road capability with heavy-duty towing strength and the kind of premium craftsmanship expected from the GMC brand. Whether youre conquering rugged trails, towing large equipment, or cruising comfortably on your daily commute, the 2024 Sierra 2500HD AT4 is engineered to exceed expectations in every category.
With its bold stance, powerful engine options, luxurious interior appointments, and advanced technology, the AT4 trim elevates the traditional heavy-duty pickup into a class of its own. This description gives you a complete, in-depth look at what makes the 2024 GMC Sierra 2500HD AT4 one of the most desirable trucks in todays market.
Bold Off-Road Styling With Distinctive AT4 Identity
The first thing you notice about the 2024 Sierra 2500HD AT4 is its unmistakable, commanding presence. The AT4 trim is built to project confidence, strength, and capability with rugged enhancements that stand out from every angle. An exclusive AT4 grille design, black chrome accents, and bold red signature recovery hooks instantly signal that this truck is built for adventure.
Monochromatic body cladding and sculpted angles work together to create a truck that looks as athletic as it is capable. The muscular hood, squared-off wheel arches, and LED lighting profile give the truck a high-end, aggressive aesthetic that proudly asserts its place as both a workhorse and a premium off-road machine.
Available 20-inch AT4-exclusive wheels wrapped in all-terrain tires enhance both the trucks stance and performance. The AT4 rides higher thanks to its off-road-tuned suspension and Rancho shock absorbers, giving it the clearance needed to take on challenging terrain. The appearance isnt just about looksits engineered for real off-road capability.
The 2024 Sierra 2500HD AT4s design seamlessly unites luxury and strength, creating a truck that turns heads everywhere it goes.
Heavy-Duty Capability Meets Off-Road Engineering
Underneath its bold exterior, the 2024 GMC Sierra 2500HD AT4 is engineered to dominate both rugged trails and heavy workloads. GMCs AT4 off-road package enhances the trucks versatility by equipping it with features built for durability and performance in demanding environments.
The heart of the AT4s capability comes from its powerful engine optionstypically featuring either a robust 6.6L V8 gas engine or an available 6.6L Duramax Turbo-Diesel V8. These powertrains are paired with advanced transmissions designed to deliver maximum torque, seamless shifting, and dependable power delivery. Whether youre towing, hauling, or climbing steep off-road inclines, the Sierra 2500HD AT4 is engineered for impressive control and capability.
The AT4 trim also includes a two-speed Autotrac transfer case, hill descent control, and skid plates that protect key components when navigating rocky or uneven terrain. The off-road suspension system, paired with Rancho monotube shocks, ensures the truck maintains stability and comfort even during aggressive off-road maneuvers.
From mountain trails to job sites, the 2024 Sierra 2500HD AT4 provides the strength and stability needed to handle nearly any challenge.
Engine Performance and Powertrain Options
The 2024 GMC Sierra 2500HD AT4 is available with two outstanding engine options, each offering a unique balance of power, durability, and performance.
6.6L V8 Gas Engine
This standard engine option is designed for reliability and strong low-end torque. With a refined 6-speed automatic transmission, the gas-powered Sierra AT4 delivers impressive power for towing smaller trailers, transporting heavy payloads, or navigating rugged terrain.
This engines strength lies in its simplicity, durability, and proven performance. It offers an
Used 2024 GMCSierra 2500HD AT4
- Exterior Color
- Volcanic Red Tintcoat
- Interior Color
- Jet Black With Kalahari Accents
- Odometer
- 16,462 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Transmission
- Automatic
- Engine
- 8
- VIN
- 1GT49PEY0RF432550
- Stock Number
- Q1745A
Highlighted Features
- Lane departure
- Leather upholstery
- Automatic temperature control
- Premium audio system
- Wireless phone connectivity
- Parking sensors
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera right
- Exterior parking camera rear
- Front dual zone A/C
- Auto high-beam headlights
Included Packages & Accessories
Standard Specifications
- 1-touch down
- 1-touch up
- Adaptive Cruise Control
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Front beverage holders
- Front dual zone A/C
- Garage door transmitter
- Heated steering wheel
- Illuminated entry
- Memory seat
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Proximity key: doors and push button start
- Rear beverage holders
- Rear door bins
- Remote engine start: keyfob and smart device (subscription required)
- Remote keyless entry
- Speed control
- Surround View Monitor: HD Surround Vision w/Hitch View yes
- Telescoping steering wheel
- Tilt steering wheel
- Transparent trailer view
- Alloy wheels
- Front anti-roll bar
- Front wheel independent suspension
- Power steering
- Single rear wheels
- Speed-sensing steering
- Tires: all-terrain
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM with 360L
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 13.4"
- Smart device integration: Apple CarPlay/Android Auto
- Speaker type: Bose
- Speakers: 7
- Steering wheel mounted audio controls
- Wireless Phone Charger: front
- Wireless phone connectivity: Bluetooth
- Front center armrest
- Front seats: bucket
- Heated front seats
- Heated rear seats
- Leather upholstery
- Max seating capacity: 5
- Power 2-way driver lumbar support
- Power 2-way passenger lumbar support
- Power driver seat
- Power passenger seat
- Rear seat center armrest
- Rear seats: split-bench
- Rear seats Folding position: fold-up cushion
- Seat Upholstery: leather
- Split folding rear seat
- Ventilated front seats
- Block heater
- Compressor: intercooled turbo
- Cylinder configuration: V-8
- Drive type: four-wheel
- Engine liters: 6.6L
- Engine location: front
- Fuel tank capacity: 36.0gal.
- Horsepower: 470hp @ 2,800RPM
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Number of valves: 32
- Rear locking differential
- Recommended fuel: Diesel
- Standard fuel economy fuel type: gasoline
- Torque: 975 lb.-ft. @ 1,600RPM
- Transmission: 10 speed automatic
- Variable valve control
- Ground clearance (min): 257mm (10.1")
- Auto-dimming door mirrors
- Bedliner
- Bumpers: body-color
- Heated door mirrors
- Hitch Class: IV
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Skid plates
- Trailer hitch
- Trailer sway control
- Turn signal indicator mirrors
- Compression ratio: 16.00 to 1
- Curb weight: 3,733kg (8,229lbs)
- Engine bore x stroke: 103.0mm x 99.0mm (4.06" x 3.90")
- Engine displacement: 6.6 L
- Engine horsepower: 470hp @ 2,800RPM
- Engine torque: 975 lb.-ft. @ 1,600RPM
- Exterior body width: 2,079mm (81.8")
- Exterior height: 2,027mm (79.8")
- Exterior length: 6,369mm (250.8")
- Front headroom: 1,093mm (43.0")
- Front hiproom: 1,554mm (61.2")
- Front legroom: 1,131mm (44.5")
- Front shoulder room: 1,677mm (66.0")
- GVWR: 5,148kg (11,350lbs)
- Payload: 1,398kg (3,083lbs)
- Rear headroom: 1,019mm (40.1")
- Rear hiproom: 1,530mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,659mm (65.3")
- Turning radius: 8.0m (26.3')
- Wheelbase: 4,039mm (159.0")
- Appearance: digital/analog
- Auto high-beam headlights
- Blind spot: Trailer Side Blind Zone Alert warning
- Compass
- Configurable
- Delay-off headlights
- Exterior parking camera cargo
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera rear: HD Rear Vision Camera w/Hitch View yes
- Exterior parking camera right
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Lane departure: Lane Departure Warning warning
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Parking sensors: UltraSonic front and rear
- Rain sensing wipers
- Rear reading lights
- Rear window defroster
- Tachometer
- Trip computer
- Variably intermittent wipers
- Voltmeter
- 4 wheel disc brakes
- ABS brakes
- Brake assist
- Dual front impact airbags
- Dual front side impact airbags
- Electronic stability
- Forward collision: Forward Collision Alert with Automatic Braking mitigation
- Front pedestrian detection: prevention
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Rear collision: Rear Cross-Traffic Alert warning
- Security system
- Traction control
Dealer Notes
KBB.com Consumer Reviews
- 2.0
Transmission trash
By Jason on Monday, April 07, 2025
Bought a 2023 GMC Duramax diesel Sierra SLT had it for two years hit 50,000 miles. The throttlebody broke went in for service. Got it back three weeks at 62,000 miles now my transmission is slipping. I travel back-and-forth from South Carolina to North Carolina for work daughter’s truck would be my forever truck. What a joke Hundred thousand dollar truck junk - 5.0
Fantastic truck
By Jjj on Sunday, November 07, 2021
This one of the most solid vehicles that I have ever driven! The 401 hp engine is more than enough power and the transmission is smooth! Highly recommend this truck! - 3.0
Don't judge a truck by the appearance
By jmil on Wednesday, May 11, 2022
Great truck, loved it until the DEF tank heater malfunctioned and shut down the truck. Now sitting waiting for the replacement tank for over 10 weeks. Turns out every HD truck 2020 and 2021 has the same problem and all will need this replacement that is being produced at a snail's pace by GM. Per the dealership, last count, over 9000 trucks like mine are idle waiting for this part. $65000 waste of money and terrible service by GMC (not the local dealership).
* The advertised price does not include sales tax, vehicle registration fees, other fees required by law, finance charges and any documentation charges. A negotiable administration fee, up to $477, may be added to the price of the vehicle. * Images, prices, and options shown, including vehicle color, trim, options, pricing and other specifications are subject to availability, incentive offerings, current pricing and credit worthiness.