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Used 2021 GMCSierra 1500 AT4 Crew Cab Pickup

  • Diesel
    Exterior Color
    Summit White
    Interior Color
    Jet Black With Kalahari Accents
    Odometer
    79,803 miles
    Body/Seating
    Crew Cab Pickup/5 seats
    Seats
    5 seats
    Fuel Economy
    16/21 MPG City/Hwy
    Transmission
    10-Speed A/T
    Drivetrain
    Four Wheel Drive
    Engine
    3.0 Liter DOHC
    VIN
    3GTU9EET2MG421226
    Stock Number
    MG421226
    GMC Sierra 1500

    Highlighted Features

    • Leather upholstery
    • Automatic temperature control
    • 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
    • Heated steering wheel

    Included Packages & Accessories

    • GVWR: 7,100 lbs
    • Federal Emissions Requirements
    • 3.23 Rear Axle Ratio
    • Engine Block Heater
    • Heated 2nd Row Outboard Seats
    • Transmission: 10-Speed Automatic
    • Not Equipped w/HD Radio
    • Front License Plate Kit
    • Preferred Equipment Group 4SB
    • Radio: Premium GMC Infotainment Sys w/Multi-Touch
    • 6-Speaker Audio System Feature
    • SiriusXM w/360L
    • Floor-Mounted Center Console
    • Compass
    • 4.2" Diagonal Color Display Driver Info Center
    • Electric Rear-Window Defogger
    • Power Door Locks
    • Remote Vehicle Starter System
    • Keyless Open & Start
    • Color-Keyed Carpeting Floor Covering
    • Front Prem Floor Liners w/Removable Carpet Insert
    • Rear Prem Floor Liners w/Removable Carpet Insert
    • OnStar & GMC Connected Services Capable
    • 4G LTE Wi-Fi Hotspot Capable
    • GMC Connected Access Capable
    • 12-Volt Rear Auxiliary Power Outlet
    • 120-Volt Instrument Panel Power Outlet
    • 120-Volt Bed Mounted Power Outlet
    • 2 USB Ports
    • Rear Dual USB Charging-Only Ports
    • HD Rear Vision Camera
    • Heated Driver & Front Outboard Passenger Seating
    • Ventilated Driver & Front Passenger Seats
    • Steering Wheel Audio Controls
    • Manual Tilt-Wheel & Telescoping Steering Column
    • Electrical Lock Control Steering Column
    • Theft Deterrent System
    • Power Front Windows w/Driver Express Up/Down
    • Power Front Passenger Windows w/Express Up/Down
    • Power Rear Windows w/Express Down
    • Spray-On Pickup Bed Liner w/AT4 Logo
    • Deep-Tinted Glass
    • Body-Color Surround Grille
    • LED Cargo Area Lighting
    • Red Recovery Hooks
    • Tires: 265/65R18SL AT BW
    • Wheels: 18" x 8.5" Machined Aluminum
    • Rear Wheelhouse Liners
    • Trailering Package
    • Hitch Guidance
    • ProGrade Trailering System
    • Hitch Guidance w/Hitch View
    • In-Vehicle Trailering App
    • 170 Amp Alternator
    • Heavy-Duty Air Filter
    • Auxiliary External Transmission Oil Cooler
    • Auto-Locking Rear Differential
    • Hill Descent Control
    • Skid Plates
    • Off-Road Suspension
    • Integrated Trailer Brake Controller
    • 2-Speed Transfer Case
    • Front Bucket Seats
    • 10-Way Power Driver Seat Adjuster w/Lumbar
    • 10-Way Power Passenger Seat Adjuster w/Lumbar
    • Driver Memory

    Included Packages & Options

    • Preferred Equipment Group 4SB
      • Radio: Premium GMC Infotainment Sys w/Multi-Touch
      • Floor-Mounted Center Console
      • Compass
      • 4.2" Diagonal Color Display Driver Info Center
      • Electric Rear-Window Defogger
      • Power Door Locks
      • Remote Vehicle Starter System
      • Keyless Open & Start
      • Color-Keyed Carpeting Floor Covering
      • Front Prem Floor Liners w/Removable Carpet Insert
      • OnStar & GMC Connected Services Capable
      • 4G LTE Wi-Fi Hotspot Capable
      • GMC Connected Access Capable
      • 12-Volt Rear Auxiliary Power Outlet
      • 120-Volt Instrument Panel Power Outlet
      • 2 USB Ports
      • Rear Dual USB Charging-Only Ports
      • HD Rear Vision Camera
      • Heated Driver & Front Outboard Passenger Seating
      • Ventilated Driver & Front Passenger Seats
      • Steering Wheel Audio Controls
      • Manual Tilt-Wheel & Telescoping Steering Column
      • Electrical Lock Control Steering Column
      • Theft Deterrent System
      • Power Front Windows w/Driver Express Up/Down
      • Power Front Passenger Windows w/Express Up/Down
      • Power Rear Windows w/Express Down
      • Spray-On Pickup Bed Liner w/AT4 Logo
      • Deep-Tinted Glass
      • Body-Color Surround Grille
      • LED Cargo Area Lighting
      • Red Recovery Hooks
      • Tires: 265/65R18SL AT BW
      • Wheels: 18" x 8.5" Machined Aluminum
      • Rear Wheelhouse Liners
      • Trailering Package
      • ProGrade Trailering System
      • 170 Amp Alternator
      • Heavy-Duty Air Filter
      • Auxiliary External Transmission Oil Cooler
      • Auto-Locking Rear Differential
      • Hill Descent Control
      • Skid Plates
      • Off-Road Suspension
      • Integrated Trailer Brake Controller
      • 2-Speed Transfer Case
    • Front Bucket Seats
      • 10-Way Power Driver Seat Adjuster w/Lumbar
      • 10-Way Power Passenger Seat Adjuster w/Lumbar
      • Driver Memory
    • Front Prem Floor Liners w/Removable Carpet Insert
      • Rear Prem Floor Liners w/Removable Carpet Insert
    • 120-Volt Instrument Panel Power Outlet
      • 120-Volt Bed Mounted Power Outlet
    • Radio: Premium GMC Infotainment Sys w/Multi-Touch
      • 6-Speaker Audio System Feature
      • SiriusXM w/360L
    • Trailering Package
      • Hitch Guidance
    • ProGrade Trailering System
      • Hitch Guidance w/Hitch View
      • In-Vehicle Trailering App
    Included Options
    • GVWR: 7,100 lbs
    • Federal Emissions Requirements
    • 3.23 Rear Axle Ratio
    • Engine Block Heater$100
    • Heated 2nd Row Outboard Seats
    • Transmission: 10-Speed Automatic
    • Not Equipped w/HD Radio
    • Front License Plate Kit

    Standard 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
    • Speed-sensing steering
    • Tires: all-terrain
    • 1st row LCD monitors: 2
    • AM/FM radio: SiriusXM
    • Primary LCD size: 8.0"
    • Radio data system
    • Smart device integration: Apple CarPlay/Android Auto
    • 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
    • Block heater
    • Cylinder deactivation
    • Drive type: four-wheel
    • Engine location: front
    • Fuel economy city: 16mpg
    • Fuel economy combined: 18mpg
    • Fuel economy highway: 21mpg
    • Fuel tank capacity: 24.0gal.
    • Hybrid traction battery type: none
    • Manual-shift auto
    • Mode select transmission
    • Rear locking differential
    • Standard fuel economy fuel type: gasoline
    • Transmission: 10 speed automatic
    • Variable valve control
    • Ground clearance (min): 276mm (10.9")
    • 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
    • Exterior body width: 2,063mm (81.2")
    • Exterior height: 1,990mm (78.3")
    • Exterior length: 5,885mm (231.7")
    • 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: 3,221kg (7,100lbs)
    • Rear headroom: 1,019mm (40.1")
    • Rear hiproom: 1,530mm (60.2")
    • Rear legroom: 1,102mm (43.4")
    • Rear shoulder room: 1,655mm (65.2")
    • Wheelbase: 3,744mm (147.4")
    • 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

    Standard Features

    • Radio: Premium GMC Infotainment Sys w/Multi-Touch
    • Floor-Mounted Center Console
    • Compass
    • 4.2" Diagonal Color Display Driver Info Center
    • Electric Rear-Window Defogger
    • Power Door Locks
    • Remote Vehicle Starter System
    • Keyless Open & Start
    • Color-Keyed Carpeting Floor Covering
    • Front Prem Floor Liners w/Removable Carpet Insert
    • OnStar & GMC Connected Services Capable
    • 4G LTE Wi-Fi Hotspot Capable
    • GMC Connected Access Capable
    • 12-Volt Rear Auxiliary Power Outlet
    • 120-Volt Instrument Panel Power Outlet
    • 2 USB Ports
    • Rear Dual USB Charging-Only Ports
    • HD Rear Vision Camera
    • Heated Driver & Front Outboard Passenger Seating
    • Ventilated Driver & Front Passenger Seats
    • Steering Wheel Audio Controls
    • Manual Tilt-Wheel & Telescoping Steering Column
    • Electrical Lock Control Steering Column
    • Theft Deterrent System
    • Power Front Windows w/Driver Express Up/Down
    • Power Front Passenger Windows w/Express Up/Down
    • Power Rear Windows w/Express Down
    • Spray-On Pickup Bed Liner w/AT4 Logo
    • Deep-Tinted Glass
    • Body-Color Surround Grille
    • LED Cargo Area Lighting
    • Red Recovery Hooks
    • Tires: 265/65R18SL AT BW
    • Wheels: 18" x 8.5" Machined Aluminum
    • Rear Wheelhouse Liners
    • Trailering Package
    • ProGrade Trailering System
    • 170 Amp Alternator
    • Heavy-Duty Air Filter
    • Auxiliary External Transmission Oil Cooler
    • Auto-Locking Rear Differential
    • Hill Descent Control
    • Skid Plates
    • Off-Road Suspension
    • Integrated Trailer Brake Controller
    • 2-Speed Transfer Case
    • 10-Way Power Driver Seat Adjuster w/Lumbar
    • 10-Way Power Passenger Seat Adjuster w/Lumbar
    • Driver Memory
    • Rear Prem Floor Liners w/Removable Carpet Insert
    • 120-Volt Bed Mounted Power Outlet
    • 6-Speaker Audio System Feature
    • SiriusXM w/360L
    • Hitch Guidance
    • Hitch Guidance w/Hitch View
    • In-Vehicle Trailering App

    Dealer Notes

    • Engine; Duramax 3.0L Turbo-Diesel I6
    • Leather Seats
    • Engine Block Heater
    • Keyless Start
    • Cooled Front Seat(S)
    • Alternator; 220 Amps
    • At4 Preferred Equipment Group
    • Audio System; Premium Gmc Infotainment System With 8" Diagonal Color Touch-Screen; Includes Multi-Touch Display; AM/FM Stereo
    • Emissions; Federal Requirements
    • Gvwr; 7100 Lbs. (3221 Kg)
    • Jet Black With Kalahari Accents; Perforated Leather Front Seat Trim
    • License Plate Kit; Front
    • Rear Axle; 3.23 Ratio
    • Seats; Front Bucket
    • Seats; Heated Second Row Outboard Seats
    • Summit White
    • Tire; Spare 265/70R17Sl All-Season; Blackwall
    • Tires; 265/65R18Sl All-Terrain; Blackwall
    • Transmission; 10-Speed Automatic; Electronically Controlled
    • Wheels; 18" X 8.5" (45.7 Cm X 21.6 Cm) Machined Aluminum
    • Not Equipped With HD Radio; See Dealer For Details


    This vehicle includes a Money-Back Guarantee* and passed our precise inspection process. Best of all the price you see is the price you pay. No haggling. No back and forth. No pressure. And this price is so good it is guaranteed. *Money-Back Guarantee is valid for 5 days or 250 miles, whichever comes first. Subject to certain terms and conditions. See store for details. Some restrictions apply.

    2021 GMC Sierra 1500 AT4 Crew Cab 4x4 – Duramax Diesel, Off-Road Ready, 46,621 Miles Rugged capability meets premium comfort in this 2021 GMC Sierra 1500 AT4 Crew Cab 4x4. Built for Colorado adventures, this Sierra AT4 combines aggressive styling, off-road capability, and the efficiency of the highly sought-after 3.0L Duramax® Turbo-Diesel engine. With just 46,621 miles, this full-size pickup delivers impressive towing capability, premium features, and everyday drivability. citeturn386search1 Highlights 46,621 miles 3.0L Duramax® Turbo-Diesel Inline-6 10-Speed Automatic Transmission Four-Wheel Drive AT4 Off-Road Package Crew Cab Configuration Factory Lifted Suspension Rancho® Off-Road Shocks Heated Front Seats Heated Steering Wheel Premium Infotainment System Trailer Tow Capability Colorado-Owned Truck citeturn386search1 AT4 Off-Road Capability The AT4 package is designed for drivers who want premium comfort without sacrificing capability: Factory 2-inch suspension lift Rancho® monotube off-road shocks Automatic locking rear differential Skid plates Hill Descent Control Off-road tuned suspension Four-wheel-drive system Red recovery hooks All-terrain capability for Colorado trails and mountain roads Duramax Diesel Performance Under the hood, the efficient and powerful Duramax diesel engine delivers: Excellent fuel economy Strong low-end torque Impressive towing capability Smooth highway performance Proven diesel reliability Excellent long-distance driving comfort citeturn386search1 Premium Interior Features Inside you'll find a refined cabin loaded with comfort and convenience: Heated front seats Heated steering wheel Leather-appointed seating Power-adjustable driver seat Dual-zone automatic climate control Remote start system Crew Cab rear-seat space Fold-up rear seating for added cargo flexibility Technology & Connectivity Stay connected wherever the road takes you: Touchscreen infotainment system Apple CarPlay® Android Auto™ Bluetooth® connectivity Rearview camera Steering wheel audio controls USB charging ports Driver information display Service & Maintenance History This Sierra has been regularly serviced throughout its Colorado ownership history: 17 documented service records Routine oil and filter changes Tire rotations Alignment service Air filter replacement Cabin air filter replacement Cooling system inspections Brake inspections Recent oil and filter service completed in May 2026 Recent tire rotation completed in May 2026 citeturn386search1 Vehicle History Three-owner vehicle Colorado-owned since new Personal vehicle ownership history No airbag deployments reported No structural damage reported No open recalls reported by CARFAX Minor cosmetic damage reported in April 2022 CARFAX notes the damage as minor in nature Clean title history reported by CARFAX citeturn386search1 Why You'll Love This Sierra AT4 Desirable Duramax® diesel engine AT4 off-road package Crew Cab versatility Heated seats and steering wheel Strong maintenance history Colorado-owned truck Excellent towing capability Premium GMC interior Aggressive AT4 styling Proven diesel performance This 2021 GMC Sierra 1500 AT4 Crew Cab 4x4 delivers the perfect combination of off-road capability, diesel efficiency, premium comfort, and full-size truck utility. Available now at AutoNation Chrysler Dodge Jeep Ram Arapahoe.

    KBB.com Consumer Reviews

    Kelley Blue Book - KBB.com
    Overall0.0Out of 5
      Privacy
      Vehicle Price
      $36,199
      Dealer Delivery and Handling Fee
      $799
      AutoNation 1Price
      $36,998

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      10743 E Arapahoe Rd
      Directions Centennial, CO 80112-3809

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        * MSRP is the Manufacturer's Suggested Retail Price (MSRP) of the vehicle. It does not include any taxes, fees or other charges. Pricing and availability may vary based on a variety of factors, including options, dealer, specials, fees, and financing qualifications. Consult your dealer for actual price and complete details. Vehicles shown may have optional equipment at additional cost. * Pricing provided may vary significantly between website and dealer as a result of supply chain constraints. Pricing shown is non-binding and does not constitute an offer. Contact your dealer for updated vehicle pricing. * The estimated selling price that appears after calculating dealer offers is for informational purposes, only. You may not qualify for the offers, incentives, discounts, or financing. Offers, incentives, discounts, or financing are subject to expiration and other restrictions. See dealer for qualifications and complete details. * 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. * In transit means that vehicles have been built, but have not yet arrived at your dealer. Images shown may not necessarily represent identical vehicles in transit to your dealership. See your dealer for actual price, payments and complete details.

        Accessories and color may vary. Quoted price subject to change without notice to correct errors or omissions. New vehicle pricing may already include applicable manufacturer incentives which may expire at any time.  Manufacturer incentive data and vehicle features is provided by third parties and believed to be accurate as of the time of publication. Please contact the store by email or phone for details and availability of incentives. Dealer delivery and handling fee of $799 included in quoted price. Sales tax or other taxes, tag, registration fees, and government fees are not included in quoted price. 

         

        Certain data and other content displayed herein is copyrighted by AutoNation, Inc. and / or third parties. (In addition, providers of data and other materials to AutoNation, Inc. or such third parties may have a copyright interest in and to such data to the extent that such data and other materials are subject to copyright protection under applicable United States laws.) Such data may not be reproduced or distributed in whole or in part by any printed, electronic or other means without explicit written permission from AutoNation, Inc. All information is gathered from sources that are believed to be reliable, but no assurance can be given that this information is complete and neither AutoNation, Inc. nor its suppliers assume any responsibility for errors or omissions or warrant the accuracy of this information.

        Displayed MPG is based on applicable EPA mileage ratings. Use for comparison purposes only. Your actual mileage will vary, depending on how you drive and maintain your vehicle, driving conditions, battery pack age/condition (hybrid models only) and other factors.