(720) 328-4335
1709 S. Acoma St. Denver, CO 80223

2024 GMC Sierra 2500HD AT4

Duramax Diesel | AT4 Premium Plus | 4WD Capability

$66,990

55,753 Miles
1GT49PEY5RF122751
Stock #: 7415
Show Me the CARFAX Good Value Badge
  Drivetrain   4WD
  Transmission   Allison 10-Speed Shiftable Automatic
  Engine   8cyl - 6.6L
  Fuel Type   Bio_diesel
  Interior   Jet Black w/Kalahari Accents
  Exterior   Summit White

This 2024 GMC Sierra 2500HD AT4 is a purpose-built heavy-duty truck combining Duramax diesel power with premium off-road capability and refined comfort. If you’re searching for a used 2024 GMC Sierra 2500HD AT4 for sale in Denver, Colorado, this one stands out with strong service history, excellent condition, and highly desirable factory packages. CARFAX shows a clean history with no accidents reported, consistent maintenance, and ownership in Texas and Colorado. Finished in Summit White with the AT4-exclusive interior, this truck is equally at home towing, traveling, or handling mountain terrain with confidence.

Vehicle Walkaround 4k Video

Vehicle Details

• VIN: 1GT49PEY5RF122751
• Engine: Duramax 6.6L Turbo-Diesel V8
• Transmission: Allison 10-Speed Automatic
• Drivetrain: 4WD
• Exterior Color: Summit White
• Interior Color: Jet Black with Kalahari Accents
• Odometer: 55,753 miles
• AT4 Premium Plus Package
• Technology Package with Head-Up Display
• Power Sunroof
• Power Retractable Assist Steps
• Heated and Ventilated Front Seats
• Heated Rear Seats and Heated Steering Wheel
• Bose Premium Sound System
• GMC MultiPro Tailgate
• Spray-In Bedliner with AT4 Logo
• HD Surround Vision and Trailer Side Blind Zone Alert

Features and Benefits

• Duramax diesel delivers outstanding torque and towing capability
• AT4 off-road hardware enhances traction and confidence on rough terrain
• Premium interior with heated and ventilated seating improves comfort year-round
• Advanced trailering technology simplifies towing and hauling
• Power assist steps and MultiPro tailgate improve everyday usability
• Head-up display and surround vision add safety and convenience
• Heavy-duty build quality designed for long-term ownership

Fully serviced, professionally detailed, and road-ready — this vehicle represents Mile High Car Helper’s commitment to quality, value, and transparency.

Dealer Details

Visit our indoor Denver showroom to experience this vehicle in person.

Mile High Car Helper
1709 S Acoma St, Denver, CO 80223
Call/Text: 720-605-1749
www.milehighcarhelper.com

Hours: Mon–Fri 10 AM–6 PM | Sat 10 AM–5 PM | Closed Sunday

We offer local credit union financing, nationwide shipping, and full in-house services including detailing, paintless dent repair, window tint, and clear mask.

Disclosure: This vehicle description has been generated using AI based on available documentation such as the original window sticker and vehicle history report. Please contact us directly to confirm specific vehicle features, options, and current condition.

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Optional Equipment

Engine
Federal Emissions Requirements
Interior
Adaptive Cruise Control
Includes full range with collision mitigation and front automatic braking.
Packages
AT4 Premium Package
Includes power sunroof, adaptive cruise control, 15 in. diagonal head-up display, rear camera mirror, universal home remote, rear sliding power window, and AT4 high clearance steps.
Drivetrain
3.42 Rear Axle Ratio
Roof and Glass
Power Sunroof
Tires and Rims
20 in. High Gloss Black Painted Wheels
Limited Promotion Option.
Comfort Features
All-Weather Floor Liners
Includes front and rear all-weather floor liners. Limited Promotion Option.
Exterior Features
Roof Marker Lamps
Includes smoked amber roof marker lamps.
Front License Plate Bracket
Included on orders with ship-to states that require a front license plate.
Power-Retractable Assist Steps
Includes power-retractable running side boards with perimeter lighting.
Towing and Hauling
GVWR of 11350 lbs.

Equipment 

Seats
Driver seat: heated, ventilated
Driver seat power adjustments: height, lumbar, reclining, 10
Front headrests: adjustable, 2
Front seat type: bucket
Passenger seat: heated, ventilated
Passenger seat power adjustments: height, lumbar, reclining, 10
Rear headrests: adjustable, 3
Rear seat: heated
Rear seat folding: folds up
Rear seat type: 60-40 split bench
Upholstery: leather-trimmed
Upholstery accents: perforated
Brakes
ABS: 4-wheel
Braking assist:
Electronic brakeforce distribution:
Electronic parking brake: auto off
Front brake diameter: 14.0
Front brake type: ventilated disc
Front brake width: 1.57
Power brakes:
Rear brake diameter: 14.2
Rear brake type: ventilated disc
Rear brake width: 1.34
Engine
Alternator: 170 amps
Auxiliary oil cooler:
Battery: heavy duty, maintenance-free
Battery rating: 720 CCA
Battery saver:
Lights
Daytime running lights: LED
Exterior entry lights: approach lamps, puddle lamps
Front fog lights: LED
Headlights: LED, auto delay off, auto high beam dimmer, auto on/off, wiper activated
Taillights: LED
Safety
Automatic emergency braking: front, front pedestrian
Blind spot safety: sensor/alert, trailer coverage
Camera system: cargo area, surround view, trailer rearview
Check rear seat reminder:
Child safety door locks:
Child seat anchors: LATCH system
Cross traffic alert: rear
Lane deviation sensors:
Pre-collision warning system: audible warning, pedestrian detection, vibrating driver seat, visual warning
Programmable safety key:
Rearview monitor: in dash
Airbags
Airbag deactivation: occupant sensing passenger
Front airbags: dual
Side airbags: front
Side curtain airbags: front, rear
Mirrors
Side mirror adjustments: power, power folding, power telescoping, reverse gear tilt
Side mirrors: auto-dimming, heated, integrated turn signals
Towing mirrors:
Windows
Front wipers: rain sensing, variable intermittent
Power windows: safety reverse
Tinted glass:
Window defogger: rear
Security
Anti-theft system: alarm, vehicle immobilizer
Power door locks: anti-lockout, auto-locking
Seatbelts
Emergency locking retractors: front
Front seatbelts: 3-point
Rear seatbelts: 3-point
Seatbelt pretensioners: front
Seatbelt warning sensor: front
Drivetrain
4WD selector: electronic hi-lo
4WD type: part time w/ on demand setting
Axle ratio: 3.73
Locking differential: rear
Suspension
Front shock type: twin-tube gas
Front spring type: torsion bars
Front stabilizer bar: diameter 35 mm
Front suspension classification: independent
Front suspension type: upper and lower control arms
Rear shock type: twin-tube gas
Rear spring type: leaf
Rear suspension classification: solid live axle
Rear suspension type: multi-leaf
Tuned suspension: off-road
Telematics
Driver assistance app: roadside assistance
Electronic messaging assistance: voice operated, with read function
Phone: voice operated
Satellite communications: OnStar, voice guided directions
Smart device app compatibility: Amazon Alexa, myGMC with Connected Access
Smart device app function: engine start, horn/light operation, lock operation, maintenance status, vehicle location
Wi-Fi: hotspot
Wireless data link: Bluetooth
Audio System
Antenna type: diversity, mast
Auxiliary audio input: Bluetooth, USB, iPod/iPhone
Premium brand: Bose
Radio: AM/FM, touch screen display, voice operated
Radio data system:
Satellite radio: SiriusXM
Speed sensitive volume control:
Subwoofer: 1
Total speakers: 6
Tires and Rims
Spare tire mount location: underbody
Spare tire size: full-size
Spare wheel type: steel
Tire Pressure Monitoring System:
Tire type: all terrain
Wheels: painted aluminum alloy
Instrumentation
Clock:
Compass:
Customizable instrument cluster:
Digital odometer:
External temperature display:
Fuel economy display: MPG, range
Gauge: oil pressure, tachometer
Instrument cluster screen size: 12.3 in.
Multi-function display:
Powertrain hour meter:
Trip odometer:
Warnings and reminders: coolant temperature warning, lamp failure, low battery, low fuel level, low oil pressure, maintenance due
Air Conditioning
Air filtration:
Front air conditioning: automatic climate control
Front air conditioning zones: dual
Rear vents: second row
Comfort Features
Armrests: rear center with cupholders, rear folding
Center console trim: leather
Floor mat material: rubber/vinyl
Floor material: carpet
Floor mats: front, rear
Heated steering wheel:
Steering wheel trim: leather
Exterior Features
Bumper detail: rear step
Door handle color: body-color
Exhaust tip color: stainless steel
Fender lip moldings: black
Front bumper color: body-color
Grille color: black, black surround
Hood scoop:
Mirror color: black
Pickup bed light: LED
Pickup bed liner: spray-on
Rear bumper color: body-color
Skid plate(s): front, rear
Tailgate: lift assist, multi-function split-folding, power locking, power open, removable, step
Window trim: black
Towing and Hauling
Auxiliary transmission fluid cooler:
Pickup bed cargo management: tie-down anchors
Tow hooks: front
Tow/Haul mode:
Trailer brake controller:
Trailer hitch:
Trailer wiring: 4-pin, 7-pin
Convenience Features
Assist handle: front, rear
Capless fuel filler system:
Center console: front console with armrest and storage
Cruise control:
Cupholders: front, rear
Easy entry: power driver seat
Memorized settings: 2 driver, driver seat, side mirrors
Multi-function remote: panic alarm, proximity entry system, vehicle and key memory
One-touch windows: 4
Overhead console: front
Power outlet(s): 115V cargo area, 115V front, 12V rear, USB front, USB rear, USB-C front, USB-C rear
Power steering: variable/speed-proportional
Power windows: lockout button
Push-button start:
Reading lights: front
Rearview mirror: auto-dimming
Remote engine start:
Steering wheel: tilt and telescopic
Steering wheel mounted controls: audio, cruise control, multi-function, phone, voice control
Storage: door pockets, front seatback, under rear seats
Vanity mirrors: dual illuminating
Wireless charging station: front
In Car Entertainment
Connected in-car apps: Google POIs, Google search, app marketplace integration
Infotainment: Google Built-In
Infotainment screen size: 13.4 in.
Smartphone integration: wireless Android Auto, wireless Apple CarPlay
Stability and Traction
Hill holder control:
Off-road driving assist: hill descent
Roll stability control:
Stability control:
Traction control:
Trailer stability control: