Used 2020 GMCSierra 1500 AT4

  • Diesel
Located at
Dave Smith Motors
Exterior Color
Onyx Black
Interior Color
Jet Black
Odometer
98,091 miles
Body/Seating
Truck Crew Cab/5 seats
Seats
5 seats
Fuel Economy
16/21 MPG City/Hwy
Transmission
10-speed automatic
Drivetrain
4x4
Engine
6 Cyl, 3.0L
VIN
3GTU9EET3LG338838
Stock Number
TLG338838
GMC Sierra 1500
  • Show Me the CARFAX 1-Owner Badge

Highlighted Features

  • Navigation system
  • Lane departure
  • Leather upholstery
  • Automatic temperature control
  • Power moonroof
  • Premium audio system
  • Wireless phone connectivity
  • Parking sensors
  • Exterior parking camera front
  • Exterior parking camera left
  • Exterior parking camera right
  • Exterior parking camera rear

Included Packages & Accessories

  • Power Sunroof
  • Wheels: 20" x 9" Machined Aluminum
  • Driver Alert Package I
  • Ultrasonic Front & Rear Park Assist
  • Lane Change Alert w/Side Blind Zone Alert
  • Rear Cross Traffic Alert
  • Perimeter Lighting
  • Driver Alert Package II
  • Forward Collision Alert
  • Lane Keep Assist w/Lane Departure Warning
  • Automatic Emergency Braking
  • Front Pedestrian Braking
  • IntelliBeam Automatic High Beam On/Off
  • Adaptive Cruise Control - Camera
  • Following Distance Indicator
  • Safety Alert Seat
  • AT4 Premium Package
  • AT4 Preferred Package
  • 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
  • Tires: LT275/65R18C MT BW
  • 6" Rectangular Black Tubular Assist Steps
  • Technology Package
  • HD Surround Vision w/2 Trailer View Camera Provisions
  • Rear Camera Mirror
  • Bed View Camera
  • Multicolor 15" Diagonal Head-Up Display
  • 8" Driver Information Center
  • High Gloss Black Mirror Caps
  • Preferred Equipment Group 4SB
  • Radio: Premium GMC Infotainment Sys w/Multi-Touch
  • 6-Speaker Audio System Feature
  • SiriusXM w/360L
  • HD Radio
  • 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
  • All-Weather Floor Liners w/AT4 Logo
  • 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
  • Heated 2nd Row Outboard 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
  • Hitch Guidance w/Hitch View
  • In-Vehicle Trailering App
  • 170 Amp Alternator
  • High-Capacity Air Filter
  • Auxiliary External Transmission Oil Cooler
  • Heavy-Duty Rear Locking Differential
  • Engine: 5.3L EcoTec3 V8
  • Hill Descent Control
  • Skid Plates
  • Off-Road Suspension
  • Hitch Guidance
  • Integrated Trailer Brake Controller
  • 2-Speed Transfer Case
  • Tires: 275/60R20SL AT BW
  • 255/80R17SL AS BW Spare Tire

Included Packages & Options

AT4 Premium Package

$2,855 included in listing price
  • AT4 Preferred Package
  • Tires: LT275/65R18C MT BW
    Goodyear Wrangler DuraTrac.
  • Driver Alert Package I
  • 6" Rectangular Black Tubular Assist Steps
    Dealer installed.

Technology Package

$2,125 included in listing price
  • HD Surround Vision w/2 Trailer View Camera Provisions
    Provides the driver with an overhead view of the scene around the vehicle on a center stack display.
  • Rear Camera Mirror
    Inside rearview auto-dimming with full camera display.
  • Bed View Camera
    Camera in the CHMSL to show a view of the cargo bed. Includes 2 trailer camera provisions.
  • Multicolor 15" Diagonal Head-Up Display

AT4 Preferred Package

$1,420 included in listing price
  • Universal Home Remote
  • Power Sliding Rear Window w/Rear Defogger
  • Radio: Premium GMC Infotainment Sys w/Navigation
    Includes 8" diagonal color touch-screen, multi-touch display, AM/FM stereo, Bluetooth streaming audio for music and most phones; featuring Android Auto and Apple CarPlay capability for compatible phones, advanced voice recognition, in-vehicle apps, personalized profiles for Infotainment and vehicle settings and greater memory.
  • Premium Bose 7-Speaker Sound System
    Includes Richbass woofer.

Driver Alert Package II

$1,095 included in listing price
  • Forward Collision Alert
  • Lane Keep Assist w/Lane Departure Warning
  • Automatic Emergency Braking
  • Front Pedestrian Braking

Driver Alert Package I

$890 included in listing price
  • Ultrasonic Front & Rear Park Assist
  • Lane Change Alert w/Side Blind Zone Alert
  • Rear Cross Traffic Alert
  • Perimeter Lighting

Tires: 275/60R20SL AT BW

$200 included in listing price
  • 255/80R17SL AS BW Spare Tire

More pre-installed items

$1,890 total, included in listing price
  • Power Sunroof$995
  • Wheels: 20" x 9" Machined Aluminum$895

Detailed Specifications

  • 1-touch down
  • 1-touch up
  • Adaptive Cruise Control
  • 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
  • Navigation system
  • Overhead console
  • Passenger door bin
  • Passenger vanity mirror
  • Power moonroof
  • Power windows
  • Proximity key: doors and push button start
  • Rear beverage holders
  • Rear door bins
  • Remote engine start: keyfob
  • Remote keyless entry
  • Speed control
  • Sunroof sunshade: manual
  • 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
  • AM/FM radio: SiriusXM with 360L
  • Premium audio system: Premium GMC Infotainment System
  • Primary LCD size: 8.0"
  • Radio data system
  • Satellite radio trial duration with new vehicle purchase (months): 3
  • Smart device integration: Apple CarPlay/Android Auto
  • Speaker type: Bose
  • Speakers: 7
  • 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 deactivation
  • Drive type: four-wheel
  • Engine location: front
  • Fuel economy city: 16mpg
  • Fuel economy combined: 18mpg
  • Fuel economy fuel type: gasoline
  • Fuel economy highway: 21mpg
  • Fuel tank capacity: 24.0gal.
  • Hybrid traction battery type: none
  • Manual-shift auto
  • Mode select transmission
  • Rear locking differential
  • 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")
  • 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")
  • Turning radius: 7.1m (23.5')
  • Wheelbase: 3,744mm (147.4")
  • Appearance: analog
  • Auto high-beam headlights
  • Blind spot: Lane Change Alert with Side Blind Zone Alert warning
  • Compass
  • Configurable
  • Delay-off headlights
  • Exterior parking camera cargo
  • Exterior parking camera front
  • Exterior parking camera left
  • Exterior parking camera rear: HD Surround Vision yes
  • Exterior parking camera right
  • Front fog lights
  • Front reading lights
  • Fully automatic headlights
  • Heads up display
  • Lane departure: Lane Keep Assist with Lane Departure Warning active
  • Low tire pressure warning
  • Oil pressure gauge
  • Outside temperature display
  • Parking sensors: UltraSonic front and rear
  • 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
  • Forward collision: Forward Collision Alert with Automatic Braking mitigation
  • Ignition disable
  • Occupant sensing airbag
  • Overhead airbag
  • Panic alarm
  • Pedestrian detection: prevention
  • Perimeter/approach lights
  • Rear collision: Rear Cross-Traffic Alert warning
  • Security system
  • Traction control

Standard Features

  • AT4 Preferred Package
  • Tires: LT275/65R18C MT BW
  • Driver Alert Package I
  • 6" Rectangular Black Tubular Assist Steps
  • HD Surround Vision w/2 Trailer View Camera Provisions
  • Rear Camera Mirror
  • Bed View Camera
  • Multicolor 15" Diagonal Head-Up Display
  • 8" Driver Information Center
  • High Gloss Black Mirror Caps
  • 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
  • Forward Collision Alert
  • Lane Keep Assist w/Lane Departure Warning
  • Automatic Emergency Braking
  • Front Pedestrian Braking
  • IntelliBeam Automatic High Beam On/Off
  • Adaptive Cruise Control - Camera
  • Following Distance Indicator
  • Safety Alert Seat
  • Ultrasonic Front & Rear Park Assist
  • Lane Change Alert w/Side Blind Zone Alert
  • Rear Cross Traffic Alert
  • Perimeter Lighting
  • 255/80R17SL AS BW Spare Tire
  • Radio: Premium GMC Infotainment Sys w/Multi-Touch
  • HD Radio
  • 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
  • All-Weather Floor Liners w/AT4 Logo
  • 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
  • Heated 2nd Row Outboard 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
  • High-Capacity Air Filter
  • Auxiliary External Transmission Oil Cooler
  • Heavy-Duty Rear Locking Differential
  • Engine: 5.3L EcoTec3 V8
  • Hill Descent Control
  • Skid Plates
  • Off-Road Suspension
  • Hitch Guidance
  • Integrated Trailer Brake Controller
  • 2-Speed Transfer Case
  • 120-Volt Bed Mounted Power Outlet
  • 6-Speaker Audio System Feature
  • SiriusXM w/360L
  • Hitch Guidance w/Hitch View
  • In-Vehicle Trailering App

Dealer Notes

Equipment
This 2020 GMC Sierra 1500 features steering wheel audio controls. This 1/2 ton pickup offers Apple CarPlay for seamless connectivity. This vehicle comes equipped with Android Auto for seamless smartphone integration on the road. You'll never again be lost in a crowded city or a country region with the navigation system on the vehicle. An off-road package is installed on this model so you are ready for your four-wheeling best. Engulf yourself with the crystal clear sound of a BOSE sound system in this model. See what's behind you with the back up camera on this GMC Sierra. It features a hands-free Bluetooth phone system. The vehicle warns of approaching vehicles with Cross-Traffic Alert. This model has auto-adjust speed for safe following. Never get into a cold vehicle again with the remote start feature on this model. This vehicle stays safely in its lane with Lane Keep Assist. Keep your hands warm all winter with a heated steering wheel in the vehicle .

Packages
Driver Alert Package I: Ultrasonic Front and Rear Park Assist; Rear Cross Traffic Alert; Perimeter Lighting; Lane Change Alert with Side Blind Zone Alert. Driver Alert Package II: Forward Collision Alert; Lane Keep Assist with Lane Departure Warning; Front Pedestrian Braking; Following Distance Indicator; Automatic Emergency Braking; Safety Alert Seat; IntelliBeam Automatic High Beam On/off; Adaptive Cruise Control - Camera. AT4 Premium Package: 6 Rectangular Black Tubular Assist Steps. Technology Package: 8 Driver Information Center; HD Surround Vision with 2 Trailer View Camera Provisions; Multicolor 15 Diagonal Head-Up Display; High Gloss Black Mirror Caps; Bed View Camera; Rear Camera Mirror. Preferred Equipment Group 4SB: Hitch Guidance; 2 USB Ports (1st Row); Electric Rear-Window Defogger; Theft Deterrent System (unauthorized Entry); Body-Color Surround Grille; High-Capacity Air Filter; Skid Plates; Compass; 4.2 Diagonal Color Display Driver Info Center; 120-Volt Instrument Panel Power Outlet; Heated Driver and Front Outboard Passenger Seating; Color-Keyed Carpeting Floor Covering; OnStar and GMC Connected Services Capable; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; All-Weather Floor Liners with AT4 Logo; Power Rear Windows with Express Down; Integrated Trailer Brake Controller; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel and Telescoping Steering Column; HD Rear Vision Camera; LED Cargo Area Lighting; Remote Vehicle Starter System; Hill Descent Control; Floor-Mounted Center Console; 170 Amp Alternator; Auxiliary External Transmission Oil Cooler; Electrical Lock Control Steering Column; Trailering Package; Off-Road Suspension; Steering Wheel Audio Controls; GMC Connected Access Capable; 2-Speed Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bed Liner with AT4 Logo; HD Radio; Red Recovery Hooks; Power Front Windows with Driver Express Up/down; Rear Dual USB Charging-Only Ports; Keyless Open and Start; 4G LTE Wi-Fi Hotspot Capable; ProGrade Trailering System; Rear Wheelhouse Liners; 12-Volt Rear Auxiliary Power Outlet; 2 USB Ports; Heavy-Duty Rear Locking Differential; Power Door Locks. AT4 Preferred Package: Premium Bose 7-Speaker Sound System; Power Sliding Rear Window with Rear Defogger; Wireless Charging; Universal Home Remote; Premium GMC Infotainment System Radio with Navigation. Power Sunroof. 20 X 9 Machined Aluminum Wheels. 6 Rectangular Black Tubular Assist Steps. Bed View Camera. 275/60R20SL AT BW Tires. Onyx Black. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**

Additional Information
**Vehicle Options listed are when the unit was originally built. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.

KBB.com Consumer Reviews

Kelley Blue Book - KBB.com
Overall4.0Out of 5
  • Depreciation of 50%

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

    4.0
    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.…
  • 2021 GMC SLT 4WD SIERRA, Great Truck

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

    5.0
    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.…
  • Great 4 cylinder truck

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

    5.0
    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.…