Used 2021 GMC Sierra 1500 SLT Truck Crew Cab

  • Used
  • Diesel
$39,047Retail Price
$39,226Price
Richardson Motors Iowa, Inc
Call 563-582-5411
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    The overview

    Exterior Color
    Dark Sky
    Interior Color
    Jet Black
    Odometer
    49,755 miles
    Body/Seating
    Truck Crew Cab/5 seats
    Seats
    5 seats
    Fuel Economy
    22/26 MPG City/Hwy
    Transmission
    Automatic
    Drivetrain
    4x4
    Engine
    I-6 cyl
    VIN
    3GTU9DET3MG170226
    Stock Number
    26T445A
    • Show Me the CARFAX 1-Owner Badge
    • AutoCheck

    The highlights

    • 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

    A closer look at what’s included

    SLT Premium Package

    • SLT Convenience Package
    • Wheels: 20" x 9" Polished Aluminum
      (50.8 cm x 22.9 cm).
    • Chrome Wheel To Wheel Assist Steps
      Wheel to wheel.

    SLT Convenience Package

    • Front Bucket Seats
      Includes center console.
    • Floor-Mounted Center Console
      Includes cup holders, cell phone storage, power cord management and hanging file holder capability.
    • Ventilated Driver & Front Passenger Seats
    • Power Sliding Rear Window w/Rear Defogger

    Engine: Duramax 3.0L Turbo-Diesel I6

    • 220 Amp Alternator
    • Engine Block Heater
    • 850 Heavy-Duty Battery
      Cold-cranking amps/95 amp-hr, maintenance free with rundown protection and retained accessory power.
    • Delete External Engine Oil Cooler

    Tires: 275/60R20SL AT BW

    • 255/80R17SL AS BW Spare Tire

    Front 40/20/40 Split-Bench Seat

    • 10-Way Power Driver Seat Adjuster w/Lumbar
    • 10-Way Power Passenger Seat Adjuster w/Lumbar
    • Driver Memory
      Recalls driver presets for power driver seat and outside mirrors.

    Preferred Equipment Group 4SA

    • Radio: Premium GMC Infotainment Sys w/Multi-Touch
      Includes 8" diagonal color touch-screen, 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.
    • Compass
      Located in instrument cluster.
    • Electric Rear-Window Defogger
    • Power Door Locks

    120-Volt Instrument Panel Power Outlet

    • 120-Volt Bed Mounted Power Outlet
      400 watts shared with (KI4) instrument panel mounted power outlet.

    Radio: Premium GMC Infotainment Sys w/Multi-Touch

    • 6-Speaker Audio System Feature
    • SiriusXM w/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.

    Trailering Package

    • Hitch Guidance

    ProGrade Trailering System

    • Hitch Guidance w/Hitch View
      Includes image adjustment, pan/zoom/tilt.
    • In-Vehicle Trailering App
      Includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder and trailer electrical diagnostics.

    More pre-installed items

    • 3.23 Rear Axle Ratio
    • Front License Plate Kit
      Will be forced on orders with ship-to states that require a front license plate.
    • 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
    • Garage door transmitter
    • 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 tires: 275/60SR20.0
    • Front wheel independent suspension
    • Power steering
    • Rear tires: 275/60SR20.0
    • Speed-sensing steering
    • Tires: all-terrain
    • Wheel size: 20"
    • 1st row LCD monitors: 2
    • Primary LCD size: 8.0"
    • Radio data system
    • 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
    • Block heater
    • Compressor: intercooled turbo
    • Cylinder configuration: I-6
    • Drive type: four-wheel
    • Engine liters: 3.0L
    • Engine location: front
    • Fuel economy city: 22mpg
    • Fuel economy combined: 16mpg
    • Fuel economy highway: 26mpg
    • Fuel tank capacity: 24.0gal.
    • Horsepower: 277hp @ 3,750RPM
    • Hybrid traction battery type: none
    • Manual-shift auto
    • Mode select transmission
    • Number of valves: 24
    • Rear locking differential
    • Standard fuel economy fuel type: gasoline
    • Transmission: 10 speed automatic
    • Variable intake manifold
    • Variable valve control
    • Ground clearance (min): 205mm (8.1")
    • Auto-dimming door mirrors
    • Bumpers: chrome
    • Door mirrors: chrome
    • Heated door mirrors
    • Left rear passenger door: conventional
    • Power door mirrors
    • Rear cargo: tailgate
    • Rear step bumper
    • Right rear passenger: conventional
    • Trailer hitch receiver
    • Trailer sway control
    • Compression ratio: 15.00 to 1
    • Engine bore x stroke: 84.0mm x 90.0mm (3.31" x 3.54")
    • Engine horsepower: 277hp @ 3,750RPM
    • Exterior body width: 2,063mm (81.2")
    • Exterior height: 1,918mm (75.5")
    • 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: 3,266kg (7,200lbs)
    • 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")
    • Towing capacity: 3,856kg (8,500lbs)
    • 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
    This 2021 GMC Sierra 1500 SLT with 49,753 miles delivers capable performance with distinctive style.

    - 3.0L Diesel Turbocharged I-6 engine with 10-speed automatic transmission and 4WD
    - SLT Premium Package with Dark Sky Metallic exterior and all-terrain tires
    - Apple CarPlay/Android Auto integration with GMC Infotainment System and SiriusXM satellite radio
    - Heated front seats, power driver seat with memory, and dual-zone automatic climate control
    - Advanced trailering technology including integrated trailer brake controller and hitch guidance

    Built for work and weekend adventures alike, this Sierra combines rugged capability with modern convenience.

    Peace of mind

    vehicle history report

    Vehicle history report

    • Title information
    • Odometer readings
    • Accident data (if applicable)
    • Service history
    • Vehicle usage
    • Recall information (if applicable)
    • Warranty status
    Free CarFax report

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    Richardson Honda is dedicated to your satisfaction before, during, and after your purchase. We'll go the extra mile to take care of you.
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    KBB.com Consumer Reviews

    Kelley Blue Book Logo4.0out of 5 overall
    • 4.0

      Depreciation of 50%

      by Manny A on 10/28/2026 10:06:36 AM

      This is a amazing truck.. Comfortable lots of sensors Etc…. My truck has 30000 miles I when to trade in they offer $46000 I paid $86000 the depreciation is incredible I don’t buy new truck never again.…
    • 5.0

      2021 GMC SLT 4WD SIERRA, Great Truck

      by Ransom1 on 10/15/2026 4:18:42 PM

      This is my 8th truck. This is hands down the very best truck I’ve ever owned. Not only is it the best looking truck on the road I have never had it in the shop except for oil changes and scheduled maintenance. The silver does not show dirt or grime.…
    • 5.0

      Great 4 cylinder truck

      by Steve on 9/23/2026 2:01:15 AM

      I have only pulled a trailer one time and still got 18 mpg down doing 80 down the interstate. Otherwise this vehicle is used for commuting or recreating. I typically get 22-24 mpg driving MT highways to the mountains. The turbo has some spunk for getting up to speed and the five years I've had my truck no complaints.…