Summit White 2021 GMC Sierra 2500HD AT4
This vehicle comes with the following features and options : AT4 Preferred Package (Bed View Camera w/2 Trailer Camera Provisions, Bose Premium 7 Speaker Sound System, HD Surround Vision, LED Smoked Amber Roof Marker Lamps, Power Sliding Rear Window w/Defogger, Radio: Premium GMC Infotainment Sys w/Navigation, Universal Home Remote, and Wireless Charging), AT4 Premium Plus Package (20" Machined Aluminum Wheels, AT4 High Clearance Step (LPO), and Power Sunroof), Driver Alert Package I (Lane Change Alert w/Side Blind Zone Alert, Perimeter Lighting, Rear Cross Traffic Alert, and Ultrasonic Front & Rear Park Assist), Driver Alert Package II (Automatic Emergency Braking, Following Distance Indicator, Forward Collision Alert, IntelliBeam Automatic High Beam On/Off, Lane Departure Warning System, and Safety Alert Seat), Gooseneck/5th Wheel Package, Gooseneck/5th Wheel Prep Package, Preferred Equipment Group 4SB (120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 12-Volt Rear Auxiliary Power Outlet, 2 USB Ports, 2 USB Ports (1st Row), 2nd Row Dual USB Charge-Only Ports, 2-Speed Active Transfer Case, 4.2" Diagonal Color Display Driver Info Center, 4G LTE Wi-Fi Hotspot Capable, Compass Located In Instrument Cluster, Deep-Tinted Glass, Electric Rear-Window Defogger, Electrical Lock Control Steering Column, Floor-Mounted Center Console, Front Prem Floor Liners w/Removable Carpet Insert, GMC Connected Access Capable, HD Rear Vision Camera, Heated & Ventilated Front Bucket Seats, Heated 2nd Row Outboard Seats, Heated Driver & Front Outboard Passenger Seats, Integrated Trailer Brake Controller, Keyless Open & Start, LED Cargo Area Lighting, Manual Tilt-Wheel/Telescoping Steering Column, OnStar & GMC Connected Services Capable, Painted Black Surround Grille, Power Door Locks, Power Front Passenger Windows w/Express Up/Down, Power Rear Windows w/Express Down, Power Windows w/Driver Express Up/Down, Rear Prem Floor Liners w/Removable Carpet Insert, Rear Wheelhouse Liners, Red Recovery Hooks, Remote Vehicle Starter System, Spray-On Pickup Box Bed Liner w/AT4 Logo, Steering Wheel Audio Controls, Unauthorized Entry Theft-Deterrent System, and Wireless Phone Projection), Technology Package (8" Multicolor Driver Information Center, Inside Rearview Auto-Dimming Rear Camera Mirror, and Multicolor 15" Diagonal Head-Up Display), X31 Off-Road Package (Hill Descent Control), 10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather, 10-Way Power Driver Seat Adjuster w/Lumbar, 10-Way Power Passenger Seat Adjuster w/Lumbar, 18" Machined Aluminum Wheels, 220 Amps Alternator, 3.42 Axle Ratio, 3.73 Rear Axle Ratio, 4-Wheel Disc Brakes, 6 Speakers, 6-Speaker Audio System Feature, ABS brakes, Air Conditioning, Alloy wheels, AM/FM radio: SiriusXM with 360L, AppLink/Apple CarPlay and Android Auto, Auto-dimming door mirrors, Auto-dimming Rear-View mirror, Automatic temperature control, Brake assist, Bumpers: body-color, Compass, Delay-off headlights, Driver door bin, Driver Memory, Driver vanity mirror, Dual front impact airbags, Dual front side impact airbags, Electronic Stability Control, Engine Block Heater, Exhaust Brake, Front anti-roll bar, Front Bucket Seats, Front Center Armrest, Front dual zone A/C, Front fog lights, Front License Plate Kit, Front reading lights, Front wheel independent suspension, Fully automatic headlights, HD Radio, Heated door mirrors, Heated front seats, Heated rear seats, Heated steering wheel, Heavy-Duty 80 Amp Battery, Hitch Guidance w/Hitch View, Illuminated entry, In-Vehicle Trailering System App, Low tire pressure warning, Memory seat, Occupant sensing airbag, Off-Road Suspension, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Perforated Leather-Appointed Front Seat Trim, Pickup Box, Power door mirrors, Power driver seat, Power passenger seat, Power steering, Power windows, Powe
Used 2021 GMCSierra 2500HD AT4
- Exterior Color
- Summit White
- Interior Color
- Jet Black With Kalahari Accents
- Odometer
- 65,910 miles
- Body/Seating
- Truck/5 seats
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4WD
- Engine
- Duramax 6.6L V8 Turbodiesel
- VIN
- 1GT49PEY3MF242492
- Stock Number
- G240365AA
Highlighted Features
- Leather upholstery
- Automatic temperature control
- Premium audio system
- Wireless phone connectivity
- Front dual zone A/C
- Auto-dimming rearview mirror
- Split folding rear seat
- Memory seat
- Heated front seats
- Ventilated front seats
- Perimeter/approach lights
- Remote keyless entry
Convenient Options to Purchase
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Included Packages & Accessories
- Preferred Equipment Group 4SB
- 3.73 Rear Axle Ratio
- 3.42 Axle Ratio
- 18" Machined Aluminum Wheels
- 20" Machined Aluminum Wheels
- Front Bucket Seats
- Perforated Leather-Appointed Front Seat Trim
- 10-Way Power Driver Seat Adjuster w/Lumbar
- AT4 Preferred Package
- AT4 Premium Plus Package
- Driver Alert Package I
- Driver Alert Package II
- Technology Package
- Radio: AM/FM w/Premium GMC Infotainment System
- Radio: Premium GMC Infotainment Sys w/Navigation
- Electric Rear-Window Defogger
- Front Prem Floor Liners w/Removable Carpet Insert
- OnStar & GMC Connected Services Capable
- 120-Volt Instrument Panel Power Outlet
- Bed View Camera w/2 Trailer Camera Provisions
- Power Sunroof
- Upfitter Switch Kit (5)
- Spray-On Pickup Box Bed Liner w/AT4 Logo
- Power-Retractable Black Assist Steps
- Deep-Tinted Glass
- Front License Plate Kit
- LED Smoked Amber Roof Marker Lamps
- LED Cargo Area Lighting
- Pickup Box
- AT4 High Clearance Step (LPO)
- Integrated Trailer Brake Controller
- Gooseneck/5th Wheel Package
- Gooseneck/5th Wheel Prep Package
- 220 Amps Alternator
- Engine Block Heater
- Skid Plates
- Off-Road Suspension
- 2-Speed Active Transfer Case
- Inside Rearview Auto-Dimming Rear Camera Mirror
- SiriusXM w/360L
- Driver Memory
- Power Sliding Rear Window w/Defogger
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- GMC Connected Access Capable
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Keyless Open & Start
- Power Door Locks
- Power Windows w/Driver Express Up/Down
- Rear Wheelhouse Liners
- Winter Grille Cover
- Rear Prem Floor Liners w/Removable Carpet Insert
- Remote Vehicle Starter System
- Compass Located In Instrument Cluster
- Floor-Mounted Center Console
- Painted Black Surround Grille
- Safety Alert Seat
- Hill Descent Control
- Exhaust Brake
- Wireless Charging
- Heated Driver & Front Outboard Passenger Seats
- Heated 2nd Row Outboard Seats
- 120-Volt Bed Mounted Power Outlet
- 12-Volt Rear Auxiliary Power Outlet
- Heated & Ventilated Front Bucket Seats
- Heavy-Duty 80 Amp Battery
- 2 USB Ports
- 2 USB Ports (1st Row)
- Electrical Lock Control Steering Column
- Manual Tilt-Wheel/Telescoping Steering Column
- Perimeter Lighting
- ProGrade Trailering System
- Hitch Guidance w/Hitch View
- IntelliBeam Automatic High Beam On/Off
- In-Vehicle Trailering System App
- HD Radio
- Ultrasonic Front & Rear Park Assist
- 4.2" Diagonal Color Display Driver Info Center
- Following Distance Indicator
- Forward Collision Alert
- Rear Cross Traffic Alert
- Lane Departure Warning System
- Universal Home Remote
- Red Recovery Hooks
- 8" Multicolor Driver Information Center
- Automatic Emergency Braking
- Steering Wheel Audio Controls
- Lane Change Alert w/Side Blind Zone Alert
- Bose Premium 7 Speaker Sound System
- 6-Speaker Audio System Feature
- 2nd Row Dual USB Charge-Only Ports
- Unauthorized Entry Theft-Deterrent System
- Multicolor 15" Diagonal Head-Up Display
- HD Rear Vision Camera
- HD Surround Vision
- 4G LTE Wi-Fi Hotspot Capable
- Wireless Phone Projection
- X31 Off-Road Package
- Compass
- AM/FM radio: SiriusXM with 360L
- Premium audio system: Premium GMC Infotainment System
- AppLink/Apple CarPlay and Android Auto
- 4-Wheel Disc Brakes
- 6 Speakers
- Air Conditioning
- Bedliner
- Electronic Stability Control
- Front Center Armrest
- Tachometer
- Voltmeter
- ABS brakes
- Alloy wheels
- Auto-dimming door mirrors
- Automatic temperature control
- Brake assist
- Bumpers: body-color
- Delay-off headlights
- Driver door bin
- Driver vanity mirror
- Dual front impact airbags
- Dual front side impact airbags
- Front anti-roll bar
- Front dual zone A/C
- Front fog lights
- Front reading lights
- Front wheel independent suspension
- Fully automatic headlights
- Heated door mirrors
- Heated front seats
- Heated rear seats
- Heated steering wheel
- Illuminated entry
- Low tire pressure warning
- Memory seat
- Occupant sensing airbag
- Outside temperature display
- Overhead airbag
- Overhead console
- Panic alarm
- Passenger door bin
- Passenger vanity mirror
- Power door mirrors
- Power driver seat
- Power passenger seat
- Power steering
- Power windows
- Rear reading lights
- Rear seat center armrest
- Rear step bumper
- Rear window defroster
- Remote keyless entry
- Security system
- Speed control
- Speed-sensing steering
- Split folding rear seat
- Steering wheel mounted audio controls
- Telescoping steering wheel
- Tilt steering wheel
- Traction control
- Trip computer
- Turn signal indicator mirrors
- Variably intermittent wipers
- Ventilated front seats
- Auto-dimming Rear-View mirror
Detailed Specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Front beverage holders
- Front dual zone A/C
- 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
- Remote keyless entry
- Speed control
- Telescoping steering wheel
- Tilt steering wheel
- 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: 8.0"
- Smart device integration: Android Auto/Apple CarPlay
- Steering wheel mounted audio controls
- 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
- Cylinder configuration: V-8
- Drive type: four-wheel
- Engine liters: 6.6L
- Engine location: front
- Fuel tank capacity: 36.0gal.
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- Standard fuel economy fuel type: gasoline
- Variable valve control
- Ground clearance (min): 257mm (10.1")
- Auto-dimming door mirrors
- Bedliner
- Bumpers: body-color
- Heated door mirrors
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Skid plates
- Trailer hitch receiver
- Trailer sway control
- Turn signal indicator mirrors
- Exterior body width: 2,079mm (81.8")
- Exterior height: 2,023mm (79.7")
- Exterior length: 6,352mm (250.1")
- 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")
- Rear headroom: 1,013mm (39.9")
- 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: 4,037mm (158.9")
- Appearance: analog
- Compass
- Delay-off headlights
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- 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
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- 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).
New vehicle pricing includes all offers and incentives. Tax, Title and Tags, $225 Dealer Doc Fee and a 1% Sales and Services fee not included in vehicle prices shown and must be paid by the purchaser.