Used 2020 GMCSierra 1500 AT4
- Exterior Color
- Satin Steel Metallic
- Interior Color
- Jet Black w/Kalahari Accents
- Odometer
- 131,629 miles
- Transmission
- 10-Speed Shiftable Automatic
- Engine
- EcoTec3 6.2L V8 420hp 460ft. lbs.
- VIN
- 1GTP9EEL5LZ123118
- Stock Number
- 26T406A
Included Packages & Accessories
- 3.23 Rear Axle Ratio
- Auxiliary Transmission Oil Cooler
- 170-Amp Alternator
- P275/60R20SL All-Terrain Blackwall Tires
- Electric Power Steering
- Rear Integrated Corner Step Bumper Detail
- Coolant Temperature Warning Warnings And Reminders
- Low Oil Pressure Warnings And Reminders
- Lamp Failure Warnings And Reminders
- MyGMC With Connected Access Smart Device App Compatibility
- Multi-function Split-folding Tailgate
- 4.2 In. Instrument Cluster Screen Size
- 8 In. Infotainment Screen Size
- GMC Infotainment System Infotainment
- Check Rear Seat Reminder
- Height Passenger Seat Power Adjustments
- Android Auto Smartphone Integration
- Apple CarPlay Smartphone Integration
- Height Driver Seat Power Adjustments
- Part Time W/ On Demand Setting 4WD Type
- Monotube Rear Shock Type
- Monotube Front Shock Type
- LED Front Fog Lights
- App Marketplace Integration Connected In-car Apps
- Power Open Tailgate
- Power Locking Tailgate
- LED Pickup Bed Light
- Maintenance Status Smart Device App Function
- Roadside Assistance Driver Assistance App
- Hill Descent Off-road Driving Assist
- Hotspot Wi-Fi
- Voice Guided Directions Satellite Communications
- Voice Operated Electronic Messaging Assistance
- With Read Function Electronic Messaging Assistance
- LED Daytime Running Lights
- Auto Start/stop
- Active Grille Shutters
- Touch Screen Display Radio
- Bluetooth Auxiliary Audio Input
- Drive Mode Selector
- Voice Operated Radio
- In Dash Rearview Monitor
- Low Battery Warnings And Reminders
- SiriusXM Satellite Radio
- Programmable Safety Key
- Front Emergency Locking Retractors
- Trailer Brake Controller
- 7-pin Trailer Wiring
- Trip Odometer
- Auto On/off Headlights
- Upper And Lower Control Arms Front Suspension Type
- Polished Aluminum Exhaust Tip Color
- 3-point Front Seatbelts
- 3-point Rear Seatbelts
- Diameter 33 Mm Front Stabilizer Bar
- Capless Fuel Filler System
- Auto Delay Off Headlights
- Voice Control Steering Wheel Mounted Controls
- Rear Cupholders
- Wiper Activated Headlights
- Proximity Entry System Multi-function Remote
- Door Pockets Storage
- LED Headlights
- Approach Lamps Exterior Entry Lights
- Puddle Lamps Exterior Entry Lights
- Front Seatback Storage
- 115V Front Power Outlet(s)
- Power Driver Seat Easy Entry
- Multi-function Steering Wheel Mounted Controls
- Phone Steering Wheel Mounted Controls
- Cruise Control Steering Wheel Mounted Controls
- Range Fuel Economy Display
- MPG Fuel Economy Display
- HD Radio Radio
- Memory Card Slot Auxiliary Audio Input
- USB Auxiliary Audio Input
- Jack Auxiliary Audio Input
- Auto-dimming Rearview Mirror
- Perforated Upholstery Accents
- 4-pin Trailer Wiring
- Front Console With Armrest And Storage Center Console
- 730 CCA Battery Rating
- Maintenance-free Battery
- Power Folding Side Mirror Adjustments
- Black Fender Lip Moldings
- Foldable Rear Headrests
- Oil Pressure Gauge
- Body-color Rear Bumper Color
- Front Struts
- Lift Assist Tailgate
- Heated Rear Seat
- Auto-locking Power Door Locks
- Remote Engine Start/cabin Preconditioning
- Reclining Driver Seat Power Adjustments
- Body-color Surround Grille Color
- Front Skid Plate(s)
- Black Grille Color
- Removable Tailgate
- Reclining Passenger Seat Power Adjustments
- Air Filtration
- Reverse Gear Tilt Side Mirror Adjustments
- Carpet Floor Material
- Folds Up Rear Seat Folding
- Rear Assist Handle
- Heated Side Mirrors
- Lumbar Passenger Seat Power Adjustments
- Lumbar Driver Seat Power Adjustments
- Front Floor Mats
- Adjustable Front Headrests
- 12V Front Power Outlet(s)
- Front Seatbelt Warning Sensor
- Full-size Spare Tire Size
- Power Side Mirror Adjustments
- Dual Illuminating Vanity Mirrors
- Push-button Start
- Roll Stability Control
- Heavy Duty Battery
- Trailer Hitch
- Multi-function Display
- Under Rear Seats Storage
- Rear Floor Mats
- Battery Saver
- Rearview Camera System
- Ventilated Passenger Seat
- External Temperature Display
- Speed Sensitive Volume Control
- LED Taillights
- Rear Center With Cupholders Armrests
- Power Brakes
- Digital Odometer
- Rear Folding Armrests
- Leather-trimmed Upholstery
- Body-color Door Handle Color
- Hill Holder Control
- Side Mirrors Memorized Settings
- Driver Seat Memorized Settings
- Dual Tip Exhaust
- Low Fuel Level Warnings And Reminders
- Tie-down Anchors Pickup Bed Cargo Management
- Audio Steering Wheel Mounted Controls
- Spray-on Pickup Bed Liner
- Body-color Front Bumper Color
- Lockout Button Power Windows
- Safety Reverse Power Windows
- Radio Data System
- Black Mirror Color
- Multi-leaf Rear Suspension Type
- 4-wheel ABS
- Tow/Haul Mode
- Compass
- Maintenance Due Warnings And Reminders
- Panic Alarm Multi-function Remote
- Tinted Glass
- Electronic Brakeforce Distribution
- Vehicle Immobilizer Anti-theft System
- LATCH System Child Seat Anchors
- Child Safety Door Locks
- Anti-lockout Power Door Locks
- Tire Pressure Monitoring System
- Variable Intermittent Front Wipers
- Power Steering
- Cruise Control
- Alarm Anti-theft System
- Tachometer Gauge
- Rear Window Defogger
- Traction Control
- Stability Control
- Front Side Curtain Airbags
- Braking Assist
- Dual Front Airbags
- Powertrain Hour Meter
- Rear Locking Differential
- Off-road Tuned Suspension
- Trailer Stability Control
- Driver Side Auto-dimming Side Mirrors
- Black Window Trim
- Front Assist Handle
- 170 Amps Alternator
- Clock
- 60-40 Split Bench Rear Seat Type
- AM/FM Radio
- Leather Steering Wheel Trim
- 12V Rear Power Outlet(s)
- 6 Total Speakers
- Ventilated Disc Front Brake Type
- Bucket Front Seat Type
- Front Reading Lights
- 10 Passenger Seat Power Adjustments
- Steel Spare Wheel Type
- Second Row Rear Vents
- Underbody Spare Tire Mount Location
- 2 Front Headrests
- Voice Operated Hands-free Phone Call Integration
- Cylinder Deactivation
- Heated Steering Wheel
- Bluetooth Wireless Data Link
- Coil Front Spring Type
- Front Tow Hooks
- 4 One-touch Windows
- 3 Rear Headrests
- Front Seatbelt Pretensioners
- 115V Cargo Area Power Outlet(s)
- OnStar Satellite Communications
- 10 Driver Seat Power Adjustments
- Leaf Rear Spring Type
- Dual Front Air Conditioning Zones
- Heated Driver Seat
- Mast Antenna Type
- Diversity Antenna Type
- Rear Side Curtain Airbags
- Rear Skid Plate(s)
- Heated Passenger Seat
- Electronic Hi-lo 4WD Selector
- Automatic Climate Control Front Air Conditioning
- Solid Live Axle Rear Suspension Classification
- Tilt And Telescopic Steering Wheel
- Front Side Airbags
- Ventilated Driver Seat
- 2 Driver Memorized Settings
- Rubber/vinyl Floor Mat Material
- Front Cupholders
- Independent Front Suspension Classification
- Ventilated Disc Rear Brake Type
- Occupant Sensing Passenger Airbag Deactivation
- GVWR of 7000 lbs.
- Off-Road Assist Steps
- Front and Rear Black Molded Splash Guards
- Engine Block Heater
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
- Auxiliary Engine Cooler : Yes
- Auxiliary Transmission Cooler : Yes
- 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 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
- 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
Dealer Notes
Experience power and luxury with this 2020 GMC Sierra 1500 AT4 Crew Cab 4x4 in sleek gray. Equipped with the robust EcoTec3 6.2L V8 engine and a smooth 10-speed automatic transmission, this truck is ready for any adventure. Off-road features include an off-road tuned suspension, hill descent assist, and rear locking differential, ensuring confidence on any terrain. Enjoy premium comfort with leather-trimmed upholstery, heated and ventilated front seats, heated rear seats, and a heated steering wheel. Stay connected through the 8-inch GMC Infotainment System with Apple CarPlay, Android Auto, Bluetooth, and built-in Wi-Fi hotspot. Convenience comes standard with a multi-function split-folding tailgate, spray-on bed liner, power folding mirrors, remote start, and power driver/passenger seat adjustments. Safety features include a rearview camera, trailer brake controller, and advanced airbags. This Sierra also boasts premium 20-inch all-terrain tires, LED headlights and fog lights, and a tow/haul mode for heavy-duty tasks. Perfect for work or play, this AT4 blends rugged capability with refined comfort.
KBB.com Consumer Reviews
- 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.