Used 2021 GMC Sierra 1500 AT4 Truck Photo 1 of 27

Used 2021 GMCSierra 1500 AT4 Truck EcoTec3 V8

Located at
Long-Lewis of the River Region
We Do Business Your Way.™
  • Our Absolute BEST Price, Up-Front, Every Time.
  • NO Dealer Fees, Hidden Fees or Bogus Mark Ups.
  • Non-Commissioned Salespeople.
  • 3 Day/300 Mile Money Back Guarantee.
    Exterior Color
    Summit White
    Interior Color
    Jet Black With Kalahari Accents
    Odometer
    70,536 miles
    Transmission
    10-Speed Automatic
    Drivetrain
    4WD
    Engine
    EcoTec3 5.3L V8
    VIN
    3GTP9EED1MG295396
    Stock Number
    P25F1156B
    GMC Sierra 1500
    • AutoCheck

    Included Packages & Accessories

    • 6 Speakers
    • AM/FM radio: SiriusXM with 360L
    • Premium audio system: GMC Infotainment System
    • Radio data system
    • Air Conditioning
    • Automatic temperature control
    • Front dual zone A/C
    • Rear window defroster
    • Memory seat
    • Power driver seat
    • Power steering
    • Power windows
    • Remote keyless entry
    • Steering wheel mounted audio controls
    • Speed-sensing steering
    • Traction control
    • 4-Wheel Disc Brakes
    • ABS brakes
    • Dual front impact airbags
    • Dual front side impact airbags
    • Front anti-roll bar
    • Front wheel independent suspension
    • Low tire pressure warning
    • Occupant sensing airbag
    • Overhead airbag
    • Brake assist
    • Electronic Stability Control
    • Delay-off headlights
    • Front fog lights
    • Fully automatic headlights
    • Panic alarm
    • Security system
    • Theft Deterrent System (Unauthorized Entry)
    • Speed control
    • Auto-dimming door mirrors
    • Bumpers: body-color
    • Heated door mirrors
    • Power door mirrors
    • Rear step bumper
    • 2 USB Ports (1st Row)
    • Apple CarPlay/Android Auto
    • Auto-dimming Rear-View mirror
    • Driver door bin
    • Driver vanity mirror
    • Front reading lights
    • Heated steering wheel
    • Illuminated entry
    • Outside temperature display
    • Overhead console
    • Passenger vanity mirror
    • Rear reading lights
    • Rear seat center armrest
    • Tachometer
    • Telescoping steering wheel
    • Tilt steering wheel
    • Trip computer
    • Voltmeter
    • Front Center Armrest
    • Heated 2nd Row Outboard Seats
    • Heated front seats
    • Perforated Leather-Appointed Front Seat Trim
    • Power passenger seat
    • Split folding rear seat
    • Ventilated front seats
    • Passenger door bin
    • 18" x 8.5" Machined Aluminum Wheels
    • Alloy wheels
    • Variably intermittent wipers
    • 3.23 Rear Axle Ratio
    • AT4 Preferred Package
    • AT4 Value Package
    • Driver Alert Package I
    • Preferred Equipment Group 4SB
    • Trailering Package
    • 6-Speaker Audio System Feature
    • Premium Bose 7-Speaker Sound System
    • Radio: Premium GMC Infotainment Sys w/Multi-Touch
    • Radio: Premium GMC Infotainment Sys w/Navigation
    • SiriusXM w/360L
    • Steering Wheel Audio Controls
    • Electric Rear-Window Defogger
    • 12-Volt Rear Auxiliary Power Outlet
    • 120-Volt Bed Mounted Power Outlet
    • 120-Volt Instrument Panel Power Outlet
    • Driver Memory
    • Power Front Passenger Windows w/Express Up/Down
    • Power Front Windows w/Driver Express Up/Down
    • Power Rear Windows w/Express Down
    • Remote Vehicle Starter System
    • Universal Home Remote
    • Auto-Locking Rear Differential
    • Electrical Lock Control Steering Column
    • Manual Tilt-Wheel & Telescoping Steering Column
    • Off-Road Suspension
    • Keyless Open & Start
    • Power Door Locks
    • Hill Descent Control
    • Perimeter Lighting
    • 170 Amp Alternator
    • Auxiliary External Transmission Oil Cooler
    • Heavy-Duty Air Filter
    • Body-Color Surround Grille
    • LED Cargo Area Lighting
    • ProGrade Trailering System
    • Rear Wheelhouse Liners
    • Spray-On Pickup Bed Liner w/AT4 Logo
    • 2 USB Ports
    • 4.2" Diagonal Color Display Driver Info Center
    • 4G LTE Wi-Fi Hotspot Capable
    • Color-Keyed Carpeting Floor Covering
    • Compass
    • Floor-Mounted Center Console
    • Front Prem Floor Liners w/Removable Carpet Insert
    • GMC Connected Access Capable
    • HD Rear Vision Camera
    • Lane Change Alert w/Side Blind Zone Alert
    • OnStar & GMC Connected Services Capable
    • Rear Cross Traffic Alert
    • Rear Dual USB Charging-Only Ports
    • Rear Prem Floor Liners w/Removable Carpet Insert
    • Ultrasonic Front & Rear Park Assist
    • Wireless Charging
    • 10-Way Power Driver Seat Adjuster w/Lumbar
    • 10-Way Power Passenger Seat Adjuster w/Lumbar
    • Front Bucket Seats
    • Heated Driver & Front Outboard Passenger Seating
    • Ventilated Driver & Front Passenger Seats
    • Hitch Guidance
    • Hitch Guidance w/Hitch View
    • In-Vehicle Trailering App
    • Integrated Trailer Brake Controller
    • Red Recovery Hooks
    • Deep-Tinted Glass
    • Power Sliding Rear Window w/Rear Defogger

    Included Packages & Options

    • AT4 Value Package$2,105
      • AT4 Preferred Package
      • Driver Alert Package I
    • AT4 Preferred Package$1,420
      • Universal Home Remote
      • Power Sliding Rear Window w/Rear Defogger
      • Radio: Premium GMC Infotainment Sys w/Navigation
      • Premium Bose 7-Speaker Sound System
      • Wireless Charging
    • Driver Alert Package I$890
      • Ultrasonic Front & Rear Park Assist
      • Lane Change Alert w/Side Blind Zone Alert
      • Rear Cross Traffic Alert
      • Perimeter Lighting

    Detailed Specifications

    • 1st and 2nd row curtain head airbags
    • 4-wheel ABS Brakes
    • ABS and Driveline Traction Control
    • Anti-theft alarm system
    • Audio System Premium Brand: GMC Infotainment System
    • Audio controls on steering wheel
    • Automatic front air conditioning
    • Auxilliary engine cooler
    • Bluetooth wireless phone connectivity
    • Braking Assist
    • Bucket front seats
    • Climate Controlled : Driver and passenger heated
    • Compass
    • Cruise control
    • Cruise controls on steering wheel
    • Daytime running lights
    • Digital Audio Input
    • Driver seat memory
    • Driver's side electrochromatic auto-dimming mirrors
    • Dual front air conditioning zones
    • Dual illuminated vanity mirrors
    • Dual reverse tilt mirrors
    • Electrochromatic rearview mirror
    • External temperature display
    • Fold-up cushion rear seats
    • Front Ventilated disc brakes
    • Front and rear reading lights
    • Front fog/driving lights
    • Fuel Consumption: City: 16 mpg
    • Fuel Consumption: Highway: 21 mpg
    • Heated driver mirror
    • Heated passenger mirror
    • Heated steering wheel
    • Leather seat upholstery
    • Leather/metal-look steering wheel trim
    • Machined aluminum rims w/ painted accents
    • Manufacturer's 0-60mph acceleration time (seconds): 6.1 s
    • Memorized Settings for 2 drivers
    • Memorized Settings including door mirror(s)
    • Metal-look dash trim
    • Passenger Airbag
    • Power remote w/tilt down driver mirror adjustment
    • Power remote w/tilt down passenger mirror adjustment
    • Power retractable mirrors
    • Power windows
    • Premium GMC Infotainment System
    • Privacy glass: Deep
    • Radio Data System
    • Rear seats center armrest
    • Remote Engine Start : Keyfob remote start
    • Remote power door locks
    • Remote window operation
    • Side airbag
    • Simulated wood/metal-look door trim
    • SiriusXM with 360L AM/FM/HD/Satellite
    • SiriusXM with 360L Satellite Radio
    • Speed-proportional electric power steering
    • Split rear bench
    • Stability controll with anti-roll
    • Suspension class: Off-road
    • Tachometer
    • Tilt and telescopic steering wheel
    • Total Number of Speakers: 6
    • Trailer hitch
    • Trip computer
    • Urethane shift knob trim
    • Video Monitor Location: Front
    • Wheel Diameter: 18
    • Wheel Width: 8.5

    Standard Features

    • AT4 Preferred Package
    • Driver Alert Package I
    • Universal Home Remote
    • Power Sliding Rear Window w/Rear Defogger
    • Radio: Premium GMC Infotainment Sys w/Navigation
    • Premium Bose 7-Speaker Sound System
    • Wireless Charging
    • Ultrasonic Front & Rear Park Assist
    • Lane Change Alert w/Side Blind Zone Alert
    • Rear Cross Traffic Alert
    • Perimeter Lighting
    • 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
    • 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
    • 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
    • Off-Road Suspension
    • Integrated Trailer Brake Controller
    • SiriusXM w/360L
    • 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

    2021 GMC Sierra 1500 AT4 4x4 â€" Off-Road Muscle with Premium Attitude

    The 2021 GMC Sierra 1500 AT4 4x4 is built for drivers who want rugged capability and upscale comfort. With serious off-road hardware, V8 power, and a refined interior, the AT4 stands tall as one of the most capable and stylish trucks in the segment.

    ⚡ Performance & Capability

    5.3-liter EcoTec3 V8 with 355 hp and 383 lb-ft of torque

    10-speed automatic transmission for smooth, responsive performance

    Standard 4x4 with two-speed AutoTrac transfer case

    Factory 2-inch suspension lift for added ground clearance

    Off-roadâ€"tuned Rancho® monotube shocks

    Skid plates, hill descent control, and automatic locking rear differential

    Tow up to 11,300 lbs (when properly equipped)

    Why it matters: The AT4 backs up its bold look with serious capability â€" equally ready for towing, trails, and anything in between.

    🛋 Interior & Comfort

    Leather-appointed seating with AT4-branded headrests

    Heated front seats and heated steering wheel

    10-way power driver’s seat with memory settings

    Dual-zone automatic climate control

    Spacious crew cab seating with premium materials throughout

    Why it matters: Rugged on the outside, refined inside â€" the AT4 gives you first-class comfort paired with true off-road grit.

    ðŸ"± Technology & Convenience

    8-inch GMC Infotainment System with Apple CarPlay® & Android Auto™

    4G LTE Wi-Fi hotspot capability

    HD rear vision camera and available 360° camera system

    Keyless open/start and remote start

    Optional GMC MultiPro Tailgate with six functional configurations

    Why it matters: Smart, intuitive tech that keeps you connected, informed, and ready for work or play.

    🛡 Safety & Dependability

    Available Driver Alert Package:

    Lane Change Alert with Side Blind Zone Alert

    Rear Cross Traffic Alert

    Front and Rear Park Assist

    StabiliTrak® with Traction Control

    Six-airbag safety system

    High-strength steel frame with GMC’s professional-grade durability

    Why it matters: The Sierra AT4 is built to protect â€" strong structure, smart safety tech, and confidence in every mile.

    🎯 Why Choose the 2021 GMC Sierra 1500 AT4 4x4

    It’s bold, capable, and premium â€" a truck designed for drivers who want off-road capability without giving up comfort or style. The Sierra AT4 delivers attitude, performance, and everyday practicality all in one package.

    🏷 Why Buy from Long-Lewis Ford of the River Region

    âœ" No Doc Fees â€" Honest, transparent pricing
    âœ" Non-Commissioned Sales Team â€" Real help, zero pressure
    âœ" Fully inspected & road-tested vehicles
    âœ" Flexible financing & fair trade-in values
    âœ" Family-owned and trusted in Alabama

    ðŸ" Call 334-365-2272 or stop by to see this 2021 GMC Sierra 1500 AT4 4x4 â€" tough, refined, and ready for whatever comes next.

    ðŸ"² Suggested Hashtags
    #GMCSierra #SierraAT4 #ProfessionalGrade #OffRoadReady
    #4x4Life #AlabamaTrucks #SmartBuy #GMCPower

    KBB.com Consumer Reviews

    Kelley Blue Book - KBB.com
    Overall4Out of 5

    • Nice truck

      By froggy on Sunday, December 06, 2020

      3.0
      I purchased this truck brand new and at 3900 miles I started to have a misfire. The warranty put a refurbished rebuilt engine in it. I was not aware that the warranty doesn't put new parts in just refurbished rebuilt parts. I traded in and lost my favorite blue truck. Not a fan of the whole process. Love the truck just not how the warranty went. I would not own another brand or model the 2020 is the nicest riding and looking. Just got a bad motor from the manufacture.…

    • Great Truck

      By Mel on Sunday, April 25, 2021

      5.0
      I love it, I get compliments every where I go, and it apparently worth more than I paid for it brand new, a year and a half later. can't ask for much more than that.…

    • Well done GM

      By Tony on Thursday, November 26, 2020

      5.0
      This truck has a 10 speed transmission that you can barely feel it shift. Traded in an F150 and test drove a similar equipped Ram. Although the Ram was nice, the styling of the GMC won me over, along with the tailgate! It also pulls my boat way better than the Ford, just smoother all around. The cabin is very quiet and the gas mileage is much better than V8 Ford. The cabin is super quiet and the ride is awesome. Love the adaptive cruise control too. The technology is fine and the screen is plenty big. Remember, you are driving this truck, not going to thr drive in! Most importantly, the controls are simple to use and Bose stereo sounds great! Oh, and I got it cheaper than the similar Ram too!…
    Based on 88 consumer ratings for 2019–2025 models.Privacy
    We do not charge license fees, processing fees, documentation (DOC) fees or destination charges saving you thousands. Simply add the applicable sales tax and a $16.50 title fee, if in State. Other States' title fees may vary. Although every reasonable effort has been made to ensure the accuracy of the information contained on this site, absolute accuracy cannot be guaranteed. In the rare event of a mistake or the manufacturer changing rebates, we reserve the right to adjust the sale price accordingly. All vehicles are subject to prior sale.
    Suggested Retail Price
    $44,777
    Discount
    -$4,882
    Long-Lewis Price
    $39,895
    Have You Seen a Lower Price? 
    IT'S NOT REAL!

    Other Dealers Include:
    • 'Must Finance' Discounts
    • 'Must Trade' Discounts
    • Rebates Not Everyone Qualifies For
    • Doc Fees, Electronic Fees, and Worthless Dealer Add-Ons
    These Bogus Practices Can Add Up to Over $10,000!

    At LONG-LEWIS:
    • NO Dealer FEES! 
    • NO Bogus Markups!
    • NO Gimmicks!
    • Just Add Tax & Title!
    LONG-LEWIS - The Price You See Is The Price You Pay! (Unless you qualify for additional rebates!)
     
    Everyone Else - The Price You See Means Nothing!

    $709/mo

    60 Months @ 6.9% A.P.R. (estimated financing rate) $3,990 Down Payment

    • We're here to help: (334) 365-2272