2024 GMC Sierra 2500HD Pro

6.6L V8 | Gooseneck/5th Wheel Prep | X31 Off-Road

$41,990

39,501 Miles
1GT59LE76RF253742
Stock #: 7799
Show Me the CARFAX 1-Owner Badge
  Drivetrain   4WD
  Transmission   Allison 10-Speed Shiftable Automatic
  Engine   8cyl - 6.6L
  Fuel Type   Gas
  Interior   Jet Black
  Exterior   Summit White

2024 GMC Sierra 2500HD Pro 4WD Double Cab – 6.6L V8 | Gooseneck/5th Wheel Prep | X31 Off-Road
(VDP: 1GT59LE76RF253742 39,501 miles)

Overview
This 2024 GMC Sierra 2500HD Pro 4WD Double Cab is a serious Colorado work truck built to tow, haul, and tackle anything the Rockies throw at it. Powered by the proven 6.6L V8 gasoline engine paired with the legendary Allison 10-speed automatic transmission, this heavy-duty pickup delivers the muscle Denver contractors, ranchers, and weekend warriors demand. Equipped from the factory with the Gooseneck/5th Wheel Package, X31 Off-Road Package, Pro Safety Plus Package, and Snow Plow Prep, it's ready for commercial duty or mountain adventures right out of the gate. Finished in Summit White over a durable Jet Black rubberized-vinyl interior, this one-owner Colorado truck has been meticulously dealer-serviced its entire life. Shop with confidence at Mile High Car Helper in Denver — the Front Range's trusted source for premium pre-owned trucks.

Vehicle Walkaround Video

Vehicle Details
• VIN: 1GT59LE76RF253742
• Engine: 6.6L V8 Gasoline
• Transmission: Allison 10-Speed Automatic
• Drivetrain: 4WD with 2-Speed Electronic Transfer Case
• Exterior Color: Summit White
• Interior Color: Jet Black
• Odometer: 39,501 miles
• Gooseneck/5th Wheel Package (Stamped Bed Holes w/Caps, 7-Pin Trailer Harness, Trailer Brake Controller, Spray-On Bedliner)
• 1SA Pro Safety Plus Package (Rear Park Assist, Lane Change Alert with Side Blind Zone Alert, Rear Cross Traffic Alert, Heated Trailering Mirrors)
• Convenience Package (EZ Lift Power Lock & Release Tailgate, Deep-Tinted Glass, LED Cargo Bed Lighting, Rear-Window Defogger, Cruise Control)
• X31 Off-Road Package (Hill Descent Control, Skid Plates, All-Terrain Tires, Off-Road Suspension, X31 Hard Badge)
• Snow Plow Prep / Camper Package (220-Amp Alternator, Increased Front GAWR, Roof Emergency Light Provisions)
• Black Assist Steps (Dealer Installed)
• 120 Volt Power Outlet in Instrument Panel
• LED Roof Marker Lamps
• GVWR 10,500 lbs
• Rear Axle 3.73 Ratio
• 17" Painted Steel Wheels
• Auto Locking Rear Differential
• Heavy-Duty Air Cleaner
• StabiliTrak with Trailer Sway Control & Hill Start Assist
• Tire Pressure Monitoring with Tire Fill Alert
• Trailering Package
• Animated LED Projector Headlamps
• Chrome Front & Rear Bumpers with CornerStep Rear Bumper
• Front Recovery Hooks
• Forward Collision Alert with Automatic Emergency Braking
• Front Pedestrian Braking
• IntelliBeam Auto High Beams
• Lane Departure Warning
• Rear Vision Camera
• Teen Driver Mode
• GMC Infotainment System with 7" Color Touchscreen
• Wireless Apple CarPlay & Android Auto
• Bluetooth Audio Streaming
• OnStar & Wi-Fi Hotspot Capable
• Air Conditioning with Rear HVAC Vents
• Power Windows & Power Door Locks
• Front 40/20/40 Bench Seats with Center Armrest Storage
• 60/40 Rear Folding Bench Seat
• Rubberized-Vinyl Floor Covering
• CARFAX 1-Owner Corporate Vehicle (Colorado)
• Dealer-Maintained Service History at Alpine Chevrolet

Mike's Notes
I personally inspected this Sierra 2500HD and I have to say, for a hard-working heavy-duty truck, it has held up remarkably well. It's a one-owner Colorado corporate truck that was serviced religiously at Alpine Chevrolet in Aurora — I counted five dealer service visits in the CARFAX, every one of them including oil changes, brake checks, and tire rotations right on schedule. CARFAX does show one minor damage report from September 2024, but we went over the body carefully and it's exactly what you'd expect from a work truck — just a cosmetic blemish, nothing structural. What really sets this one apart is how it's optioned: you've got the full Gooseneck/5th Wheel prep with the integrated brake controller and spray-in bedliner, plus the X31 Off-Road Package with skid plates and all-terrains, AND the Snow Plow Prep package with the upgraded 220-amp alternator. That combination is tough to find — this truck is ready to plow Denver driveways in the morning, tow a gooseneck to Grand Junction in the afternoon, and head up to the trailhead on the weekend. At under 40k miles on the gas 6.6L and Allison, you're getting a ton of truck for the money.

Features and Benefits
• 6.6L V8 Gas Engine with Allison 10-Speed Automatic – Bulletproof heavy-duty powertrain delivers strong towing and hauling capability without the complexity or cost of diesel maintenance
• 4WD with 2-Speed Electronic Transfer Case – Confidently handles Colorado snowstorms, muddy jobsites, and mountain passes with the flip of a switch
• Gooseneck/5th Wheel Package with Integrated Trailer Brake Controller – Factory-prepped for heavy trailers — hitch up your horse trailer, RV, or equipment hauler without aftermarket modifications
• X31 Off-Road Package – Skid plates, all-terrain tires, and off-road suspension make this truck trail-ready for exploring Colorado's backcountry and 4x4 trails
• Snow Plow Prep Package with 220-Amp Alternator – Ready to mount a plow for serious winter work in Denver and the Front Range — perfect for commercial use or clearing your own property
• Pro Safety Plus Package (Blind Zone, Rear Cross Traffic, Park Assist) – Takes the stress out of maneuvering a full-size HD truck in tight Denver parking lots and busy I-25 traffic
• Heated Trailering Mirrors – Clear visibility to trailers in Colorado's cold mornings and extended view when towing wide loads
• Spray-On Bedliner & EZ Lift Power Tailgate – Protects your investment from cargo damage and makes loading quicker and easier on your back
• Wireless Apple CarPlay & Android Auto – Seamless smartphone integration for navigation and music without fumbling with cables on the road
• Rubberized-Vinyl Floor Covering & Vinyl-Friendly Interior – Easy hose-out cleanup after muddy worksites, snowy boots, or weekend adventures
• CARFAX 1-Owner with Full Dealer Service History – Documented maintenance from a Colorado GM dealer gives you peace of mind that this truck was cared for from day one
• LED Projector Headlamps & LED Roof Marker Lamps – Superior nighttime visibility on dark Colorado highways and proper commercial vehicle lighting compliance

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.

Equipment 

Seats
Driver seat manual adjustments: reclining, 4
Front headrests: adjustable, 2
Front seat type: 40-20-40 split bench
Passenger seat manual adjustments: reclining, 4
Rear headrests: adjustable, 3
Rear seat folding: folds up
Rear seat type: 60-40 split bench
Upholstery: vinyl
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
Headlights: LED, auto delay off, auto high beam dimmer, auto on/off, wiper activated
Taillights: LED
Safety
Automatic emergency braking: front, front pedestrian
Camera system: rearview
Check rear seat reminder:
Child safety door locks:
Child seat anchors: LATCH system
Lane deviation sensors:
Pre-collision warning system: audible warning, pedestrian detection, 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: manual, manual folding, manual telescoping
Towing mirrors:
Windows
Front wipers: variable intermittent
Power windows: safety reverse
Solar-tinted glass:
Security
Anti-theft system: 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
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
Telematics
Electronic messaging assistance: voice operated, with read function
Phone: voice operated
Satellite communications: OnStar
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: mast
Auxiliary audio input: Bluetooth, USB, iPod/iPhone
Radio: AM/FM, touch screen display
Radio data system:
Speed sensitive volume control:
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 season
Wheels: painted steel
Instrumentation
Clock:
Compass:
Digital odometer:
External temperature display:
Fuel economy display: MPG, range
Gauge: oil pressure, tachometer
Instrument cluster screen size: 3.5 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:
Front air conditioning zones: single
Rear vents: second row
Comfort Features
Armrests: front center
Floor material: rubber/vinyl
Steering wheel trim: urethane
Exterior Features
Bumper detail: rear step
Door handle color: black
Exhaust tip color: stainless steel
Fender lip moldings: black
Front bumper color: chrome
Grille color: black, chrome surround
Hood scoop:
Mirror color: black
Pickup bed light:
Rear bumper color: chrome
Tailgate: removable
Window trim: black
Towing and Hauling
Auxiliary transmission fluid cooler:
Pickup bed cargo management: tie-down anchors
Tow hooks: front
Tow/Haul mode:
Trailer hitch:
Trailer wiring: 4-pin, 7-pin
Convenience Features
Assist handle: front, rear
Capless fuel filler system:
Cupholders: front
Multi-function remote: keyless entry, panic alarm
One-touch windows: 4
Overhead console: front
Power outlet(s): 12V front, USB front, USB-C front
Power steering:
Power windows: lockout button
Push-button start:
Reading lights: front
Rearview mirror: manual day/night
Steering wheel: tilt
Storage: door pockets, in seat cushion
Sun visors:
In Car Entertainment
Connected in-car apps: Google POIs, Google search, app marketplace integration
Infotainment: GMC Infotainment System
Infotainment screen size: 7 in.
Smartphone integration: wireless Android Auto, wireless Apple CarPlay
Stability and Traction
Hill holder control:
Roll stability control:
Stability control:
Traction control:
Trailer stability control: