2021 GMC Sierra 2500AT473k miles
$49,998
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Love it for less
Explore the Sierra 2500
Made for heavy-duty hauling and long-distance road trips
Why you'll love this Sierra 2500
A capable full-size pickup that's powerful, comfortable, and versatile

Well equipped
30+ popular features like Apple CarPlay®, Android Auto™, Lane Departure Warning.
Premium Audio
BOSE Sound System
Blue
Exterior Color
Black
Interior Color
Four Wheel Drive
Drive Type
8-cyl, Gas, 6.6L
Engine
Automatic
Transmission
6.5 ft
Bed Length
18,500 lbs
Towing Capacity (Max)
401
Horsepower
464 ft-lbs
Torque
Vehicle Features and Specs
Features
Installed Upgrades
Automatic Highbeams
Blind Spot Monitor
Cross-Traffic Alert
Head Up Display
Lane Departure Warning
Navigation System
Parking Sensors
Preferred Package
Running Boards
Sunroof(s)
Universal Garage Door Opener
Comfort & Convenience
A/C Seat(s)
Heated Steering Wheel
Rear Seat Heaters
Remote Start
Front Seat Heaters
Memory Seat(s)
Cruise Control
Smart Key
Power Seat(s)
Air Conditioning
Power Mirrors
Rear Defroster
Power Windows
Power Locks
Driver Assistance‡
Rear View Camera
ABS Brakes
Traction Control
Entertainment & Technology
BOSE Sound System
Apple CarPlay®
Android Auto™
Bluetooth Technology
Satellite Radio Ready
SiriusXM Trial Available
Auxiliary Audio Input
AM/FM Stereo
WiFi Hotspot
Interior
Leather Seats
Side Airbags
Overhead Airbags
Exterior
Bed Liner
Alloy Wheels
Fog Lamps
Mechanical
Tow Hitch
Four Wheel Drive
Automatic Transmission
Key Specifications
6.5 ft
Bed LengthFour Wheel Drive
Drive Type8-cyl, Gas, 6.6L
EngineBlue
Exterior ColorBlack
Interior ColorAutomatic
TransmissionPerformance
36 gal
Fuel Capacity401
Horsepower464 ft-lbs
TorqueMeasurements
250.08" x 81.85" x 79.82"
Dimensions (L x W x H)43.03"
Driver Head Room44.53"
Driver Leg RoomLT275/70R18E
Front Tire Size (standard)158.94"
WheelbaseTrailering
18,500 lbs
Towing Capacity (Max)for the 2021 GMC Sierra 2500 AT4
Specs
Installed Upgrades
Automatic Highbeams
Blind Spot Monitor
Cross-Traffic Alert
Head Up Display
Lane Departure Warning
Navigation System
Parking Sensors
Preferred Package
Running Boards
Sunroof(s)
Universal Garage Door Opener
Comfort & Convenience
A/C Seat(s)
Heated Steering Wheel
Rear Seat Heaters
Remote Start
Front Seat Heaters
Memory Seat(s)
Cruise Control
Smart Key
Power Seat(s)
Air Conditioning
Power Mirrors
Rear Defroster
Power Windows
Power Locks
Driver Assistance‡
Rear View Camera
ABS Brakes
Traction Control
Entertainment & Technology
BOSE Sound System
Apple CarPlay®
Android Auto™
Bluetooth Technology
Satellite Radio Ready
SiriusXM Trial Available
Auxiliary Audio Input
AM/FM Stereo
WiFi Hotspot
Interior
Leather Seats
Side Airbags
Overhead Airbags
Exterior
Bed Liner
Alloy Wheels
Fog Lamps
Mechanical
Tow Hitch
Four Wheel Drive
Automatic Transmission
Key Specifications
6.5 ft
Bed LengthFour Wheel Drive
Drive Type8-cyl, Gas, 6.6L
EngineBlue
Exterior ColorBlack
Interior ColorAutomatic
TransmissionPerformance
36 gal
Fuel Capacity401
Horsepower464 ft-lbs
TorqueMeasurements
250.08" x 81.85" x 79.82"
Dimensions (L x W x H)43.03"
Driver Head Room44.53"
Driver Leg RoomLT275/70R18E
Front Tire Size (standard)158.94"
WheelbaseTrailering
18,500 lbs
Towing Capacity (Max)for the 2021 GMC Sierra 2500 AT4
Standard OEM Features
These are standard original equipment manufacturer features for the 2021 GMC Sierra 2500 AT4. All available options are not listed below and may vary by car.
- 4G LTE Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)
- Air conditioning, dual-zone automatic climate control
- Air filter, heavy-duty
- Air filtration monitoring
- Air vents, rear
- 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 (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
- Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.)
- Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
- Audio system feature, 6-speaker system
- Audio system, Premium GMC Infotainment System with 8" diagonal color touch-screen includes 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, advanced voice recognition, in-vehicle apps, personalized profiles for infotainment and vehicle settings (Includes (PZ8) Hitch Guidance with hitch view.)
- Auto-locking rear differential
- 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.)
- Bed Liner, 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. Not available with any Ship Thrus EXCEPT (VSH), (VTV), (TCH) or (TCE).)
- Bed Step, Black integrated on forward portion of bed on driver and passenger side
- Bluetooth for phone, connectivity to vehicle infotainment system
- Brake lining wear indicator
- Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
- Bumper, front, body-color lower
- Bumper, rear body-color with bumper CornerSteps
- Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
- Cargo tie downs (12), fixed rated at 500 lbs per corner
- Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
- Compass, located in instrument cluster
- Cooling, auxiliary external transmission oil cooler
- Cooling, external engine oil cooler
- CornerStep, rear bumper
- Cruise control, steering wheel-mounted
- Daytime Running Lamps, LED signature lighting
- Defogger, rear-window electric
- Door handles, body-color
- Door locks, power
- Driver Information Center, 4.2" diagonal color display includes driver personalization
- Driver memory recalls driver "presets" for power driver seat and outside mirrors
- 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)
- Exterior Temperature Display, located in radio display
- Floor covering, color-keyed carpeting
- Fog lamps, LED
- Four wheel drive
- Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
- Glass, deep-tinted
- GMC Connected Access capable (Subject to terms. See onstar.com or dealer for details)
- Grille (Painted Black surround with high gloss Black mesh and Black chrome inserts.)
- GVWR, 10,650 lbs. (4831 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18" or 20" wheels or TK20943 and (L8T) 6.6L V8 gas engine with 17" wheels.)
- HD Rear Vision Camera
- Headlamps, LED reflector (high intensity) with LED turn signals and LED signature Daytime Running Lamps
- Hill Descent Control
- Hitch Guidance with Hitch View with image adjustment, Pan/Zoom/Tilt
- 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 ONLY when (PTT) trailer tire pressure monitor system is factory ordered and sensors are installed.)
- Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
- Keyless Open and Start
- Lamps, cargo area cab mounted integrated with center 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 center switch bank or key fob
- Mirror caps, high gloss Black
- Mirror, inside rearview auto-dimming
- Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm]) (Molded in color Black.)
- Moldings, beltline, Black
- ONSTAR ADDITIONAL 21 MONTHS OF ONSTAR ASSURANCE FOR TIER3 FLEETS. Provides 21 months of OnStar Assurance service in addition to the 3 months of complimentary Safety & Security coverage that is included in the price of the vehicle. Total Fleet OnStar Safety & Security service duration is 3 months and 21 months of OnStar Assurance. (Requires (UE1) OnStar. Requires one of the following Fleet or Government order types: FLS, FNR, FRC, FBC, FGO or FEF. Not available with P0J, P0K, P0L, R7Z, P1R, P1T or P1U. Not available with a ship-to of Guam, Puerto Rico or the Virgin Islands.)
- ONSTAR ADDITIONAL 21 MONTHS OF ONSTAR FLEET SAFETY AND SECURITY. Provides 21 months of Fleet Safety and Security service in addition to the 3 months of complimentary coverage that is included in the price of the vehicle. Total OnStar Fleet Safety and Security service duration is 24 months. (Requires (UE1) OnStar. Requires one of the following Fleet or Government order types: FLS, FNR, FRC, FBC, FGO or FEF. Not available with P0K, P0L, R7Z, P1R, P1S, P1T or P1U. Not available with a ship-to of Guam, Puerto Rico or the Virgin Islands.)
- ONSTAR ADDITIONAL 33 MONTHS OF ONSTAR ASSURANCE FOR TIER3 FLEETS. Provides 33 months of OnStar Assurance service in addition to the 3 months of complimentary Safety & Security coverage that is included in the price of the vehicle. Total Fleet OnStar Safety & Security service duration is 3 months and 33 months of OnStar Assurance. (Requires (UE1) OnStar. Requires one of the following Fleet or Government order types: FLS, FNR, FRC, FBC, FGO or FEF. Not available with P0J, P0K, P0L, R7Z, P1R, P1S or P1U. Not available with a ship-to of Guam, Puerto Rico or the Virgin Islands.)
- ONSTAR ADDITIONAL 33 MONTHS OF ONSTAR FLEET DRIVER REMOTE ACCESS. Provides 33 months of Fleet Driver Remote Access service in addition to the 3 months of complimentary coverage that is included in the price of the vehicle. Total OnStar Fleet Driver Remote Access service duration is 36 months. (Requires (UE1) OnStar. Requires one of the following Fleet or Government order types: FLS, FNR, FRC, FBC, FGO or FEF. Not available with P0M or P0O. Not available with a ship-to of Guam, Puerto Rico or the Virgin Islands.)
- ONSTAR ADDITIONAL 45 MONTHS OF ONSTAR ASSURANCE FOR TIER3 FLEETS. Provides 45 months of OnStar Assurance service in addition to the 3 months of complimentary Safety & Security coverage that is included in the price of the vehicle. Total Fleet OnStar Safety & Security service duration is 3 months and 45 months of OnStar Assurance. (Requires (UE1) OnStar. Requires one of the following Fleet or Government order types: FLS, FNR, FRC, FBC, FGO or FEF. Not available with P0J, P0K, P0L, R7Z, P1R, P1S or P1T. Not available with a ship-to of Guam, Puerto Rico or the Virgin Islands.)
- ONSTAR ADDITIONAL 45 MONTHS OF ONSTAR FLEET DRIVER REMOTE ACCESS. Provides 45 months of Fleet Driver Remote Access service in addition to the 3 months of complimentary coverage that is included in the price of the vehicle. Total OnStar Fleet Driver Remote Access service duration is 48 months. (Requires (UE1) OnStar. Requires one of the following Fleet or Government order types: FLS, FNR, FRC, FBC, FGO or FEF. Not available with P0M or P0N. Not available with a ship-to of Guam, Puerto Rico or the Virgin Islands.)
- ONSTAR ADDITIONAL 45 MONTHS OF ONSTAR FLEET SAFETY AND SECURITY. Provides 45 months of Fleet Safety and Security service in addition to the 3 months of complimentary coverage that is included in the price of the vehicle. Total OnStar Fleet Safety and Security service duration is 48 months. (Requires (UE1) OnStar. Requires one of the following Fleet or Government order types: FLS, FNR, FRC, FBC, FGO or FEF. Not available with P0J, P0K, R7Z, P1R, P1S, P1T or P1U. Not available with a ship-to of Guam, Puerto Rico or the Virgin Islands.)
- ONSTAR ADDITIONAL 9 MONTHS OF ONSTAR ASSURANCE FOR TIER3 FLEETS. Provides 9 months of OnStar Assurance service in addition to the 3 months of complimentary Safety & Security coverage that is included in the price of the vehicle. Total Fleet OnStar Safety & Security service duration is 3 months and 9 months of OnStar Assurance. (Requires (UE1) OnStar. Requires one of the following Fleet or Government order types: FLS, FNR, FRC, FBC, FGO or FEF. Not available with P0J, P0K, P0L, R7Z, P1S, P1T or P1U. Not available with a ship-to of Guam, Puerto Rico or the Virgin Islands.)
- OnStar and GMC connected services capable (Terms and limitations apply. See onstar.com or dealer for details.)
- Pickup bed includes bed assist step
- Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
- Power outlet, front auxiliary, 12-volt
- Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
- Power outlet, rear auxiliary, 12-volt
- Premium Floor Liners with removable carpet insert, front
- Premium Floor Liners with removable carpet insert, rear
- ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (U1D) In-vehicle Trailering App
- Radio, HD
- Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
- Rear Seat Reminder
- Recovery hooks, Red
- Remote vehicle starter system
- Seat adjuster, driver 10-way power including lumbar
- Seat adjuster, passenger 10-way power including lumbar
- Seat trim, Perforated leather-appointed front
- 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, center fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)
- Seating, heated driver and front outboard passenger
- Seats, front bucket with center console
- Seats, heated second row outboard seats
- Seats, ventilated driver and front passenger
- SiriusXM Radio
- SiriusXM Radio with 360L Equipped with SiriusXM with 360L. Enjoy a trial subscription of the All Access package for the full 360L experience, with a greater variety of SiriusXM content, a more personalized experience and easier navigation. With the All Access package, you can also enjoy your favorites everywhere you go, with the SiriusXM app, online and at home on compatible connected devices. (IMPORTANT: The SiriusXM radio trial package is not provided on vehicles that are ordered for Fleet Daily Rental ("FDR") use. If you decide to continue service after your trial, the subscription plan you choose will automatically renew thereafter and you will be charged according to your chosen payment method at then-current rates. Fees and taxes apply. See the SiriusXM Customer Agreement at www.siriusxm.com for complete terms and how to cancel. All fees, content, features, and availability are subject to change. GM connected vehicle services vary by vehicle model and require active service plan, working electrical system, cell reception and GPS signal. See onstar.com for details and limitations.)
- Skid Plates protect the oil pan, front axle and transfer case
- StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
- Steering column, lock control, electrical
- Steering column, manual Tilt-Wheel and telescoping
- Steering wheel audio controls
- Steering wheel, heated
- Steering wheel, leather-wrapped
- Steering, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
- Suspension, Off-Road includes twin-tube shocks
- Tailgate and bed rail protection caps, top
- Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
- Tailgate, GMC MultiPro Tailgate with six functional load/access features
- Taillamps, LED signature taillight with LED stop and reverse light
- TECHNOLOGY PACKAGE includes (DRZ) Rear Camera Mirror and (UV6) Multi-color 15" Diagonal Head-Up Display Includes (UHS) 8" Digital Driver information Center. (Requires (PDJ) Driver Alert Package II and (PDO) AT4 Preferred Package. Included with (PDG) AT4 Premium Plus Package.)
- Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. 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
- Theft-deterrent system, unauthorized entry
- Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
- Tire Pressure Monitoring System with Tire Fill Alert (does not apply to spare tire)
- Tire, spare LT275/70R18 all-terrain, blackwall
- Tires, LT275/70R18E all-terrain, blackwall
- Trailer brake controller, integrated
- Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
- Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance
- Transfer case, two-speed active, electronic Autotrac with push button control
- Transmission, 6-speed automatic, heavy-duty
- USB Ports (Inside Console with bucket seats), 2 also includes 1 SD card reader and auxiliary jack
- USB ports, 2 (first row) located on instrument panel
- USB ports, dual, charge-only (2nd row)
- Wheelhouse liners, rear
- Wheels, 18" (45.7 cm) machined aluminum wheel with Dark Grey metallic accents
- Window, power front, passenger express up/down
- Windows, power front, drivers express up/down
- Windows, power rear, express down
- Wireless Phone Projection for Apple Carplay and Android Auto
- X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks
Comfort & Convenience
Driver Assistance‡
Entertainment & Technology
Life of this car
Multiple owners
Reported by AutoCheck®No basic manufacturer warranty remaining
Optional MaxCare® protection
See available plans, coverage, and benefitsHistory report
Vehicle history by AutoCheck®Looking for specifics?
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Even more to love
The 2021 GMC Sierra 2500 delivers powerful performance, capable towing, and a comfortable interior.
CarMax Certified quality
Drive with confidence
No flood or frame damage
No reported odometer problems
Deep cleaned interior
125-point inspection
View listVehicle history by AutoCheck®
View report10-day money back guarantee
30-day limited warranty
Longer in some states. See store for details.
Cosmetic condition
Our cars are used, so you might spot a scratch or ding. We fix what’s needed to meet our cosmetic standards and leave some small blemishes so you get a better price.

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The CarMax difference
CarMax Certified quality
Easy 10-day returns
30-day limited warranty
Longer in some states. See store for details.Optional MaxCare® keeps you covered
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Love it for less
† Available within a 60-mile radius of select stores. See store for details.
‡ Driver assistance features are not a substitute for attentive driving; the driver is responsible for vehicle operation at all times. Features may have limited functionality in certain situations. See this car’s Owner’s Manual and manufacturer information for full details and important limitations.
§ MPG/MPGe/range figures based on EPA estimates for vehicle sold as new; results will vary based on vehicle history and driving conditions.
‖ Apple CarPlay and iPhone are trademarks of Apple Inc. Google, Android and Android Auto are trademarks of Google LLC.
¶All trademarks are the property of their respective owners. Use of a third-party trademark does not imply an endorsement or affiliation.

2021 GMC Sierra 2500 AT4
$49,998*
73K miles
Features
A/C Seat(s)
Heated Steering Wheel
Rear Seat Heaters
Remote Start
Front Seat Heaters
Memory Seat(s)
Cruise Control
Smart Key
Power Seat(s)
Air Conditioning
Power Mirrors
Rear Defroster
Power Windows
Power Locks
Universal Garage Door Opener
Head Up Display
Lane Departure Warning
Blind Spot Monitor
Rear View Camera
Parking Sensors
Cross-Traffic Alert
ABS Brakes
Traction Control
BOSE Sound System
Navigation System
Apple CarPlay®
Android Auto™
Bluetooth Technology
Satellite Radio Ready
SiriusXM Trial Available
Auxiliary Audio Input
AM/FM Stereo
WiFi Hotspot
Leather Seats
Sunroof(s)
Side Airbags
Overhead Airbags
Running Boards
Bed Liner
Alloy Wheels
Automatic Highbeams
Fog Lamps
Tow Hitch
Four Wheel Drive
Automatic Transmission
Specifications
Exterior Color
Blue
Interior Color
Black
Drive Type
Four Wheel Drive
Engine
8-cyl, Gas, 6.6L
Transmission
Automatic
Bed Length
6.5 ft
Towing Capacity (Max)
18,500 lbs
Horsepower
401
Torque
464 ft-lbs
Dimensions (L x W x H)
250.08" x 81.85" x 79.82"
Wheelbase
158.94"
Driver Leg Room
44.53"
Driver Head Room
43.03"
Fuel Capacity
36 gal
Front Tire Size (standard)
LT275/70R18E
*Price excludes state and local taxes, title, registration, tags, and any optional products or services. Price assumes that final purchase will be made in the State of MD, unless vehicle is non-transferable. Vehicle subject to prior sale. Applicable transfer fees are due in advance of vehicle delivery and are separate from sales transactions. Limited warranty is 30 days. See store for details. We make every effort to provide accurate information, but please verify before purchasing.












































