2021 GMC Sierra AT4
GMC Sierra Details
Automatic
6 Cyl, 3.0L
Summit White
4WD
Diesel
80,613 Miles
Jet Black w/Kalahari Accents
UL316663
1GTU9EET3MZ316663
1500
Leather
AT4
Estimated Payment
$0 / month
About This 2021 GMC Sierra
Ready for work and weekend adventures, this 2021 GMC Sierra 1500 AT4 4WD combines rugged capability with refined comfort. Powered by a torquey 6-cylinder 3.0L Diesel engine, this GMC Sierra delivers excellent fuel efficiency and confident towing performance while preserving a quiet, comfortable ride. Finished in a commanding exterior and thoughtfully appointed interior, the AT4 trim brings off-road-ready suspension and premium accents for a capable, upscale experience.
Enjoy cold mornings with Remote Start and a Heated Steering Wheel. Driver-assist features like Lane Departure Warning enhance safety on long drives, while Steering Wheel Audio Controls keep entertainment and calls within easy reach. This GMC Sierra is documented as a CARFAX 1-Owner vehicle, reflecting consistent care and a clean ownership history.
Located in McConnellsburg, PA, this 2021 GMC Sierra AT4 is priced to move — the best price available for comparable AT4 Diesel models in the region. Whether you need a dependable work truck, a weekend trail-hauler, or a highway cruiser with diesel economy, this GMC Sierra checks the boxes: rugged capability, modern tech, and comfort features that matter.
Schedule a test drive today to experience the diesel torque, smooth shifting, and confident 4WD traction firsthand. Competitive pricing, one-owner history, and sought-after AT4 features make this GMC Sierra 1500 an exceptional value in McConnellsburg, PA — ready to go where you need it to.
Enjoy cold mornings with Remote Start and a Heated Steering Wheel. Driver-assist features like Lane Departure Warning enhance safety on long drives, while Steering Wheel Audio Controls keep entertainment and calls within easy reach. This GMC Sierra is documented as a CARFAX 1-Owner vehicle, reflecting consistent care and a clean ownership history.
Located in McConnellsburg, PA, this 2021 GMC Sierra AT4 is priced to move — the best price available for comparable AT4 Diesel models in the region. Whether you need a dependable work truck, a weekend trail-hauler, or a highway cruiser with diesel economy, this GMC Sierra checks the boxes: rugged capability, modern tech, and comfort features that matter.
Schedule a test drive today to experience the diesel torque, smooth shifting, and confident 4WD traction firsthand. Competitive pricing, one-owner history, and sought-after AT4 features make this GMC Sierra 1500 an exceptional value in McConnellsburg, PA — ready to go where you need it to.
Features & Options
- AT4 CarbonPro Edition: AT4 Carbon Hard Badge; Black Dual Exhaust Tips; MulitPro Audio System by Kicker; Unique Grille Surround with Black Chrome Finish; CarbonPro (carbon Fiber Composite) Bed
- 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
- Technology Package: 8" Driver Information Center; HD Surround Vision with 2 Trailer View Camera Provisions; Multicolor 15" Diagonal Head-Up Display; Bed View Camera; Rear Camera Mirror
- AT4 Value Package
- Preferred Equipment Group 4SB: HD Rear Vision Camera; LED Cargo Area Lighting; Remote Vehicle Starter System; 2 USB Ports (1st Row); Hill Descent Control; Electric Rear-Window Defogger; Floor-Mounted Center Console; Theft Deterrent System (unauthorized Entry); Body-Color Surround Grille; 170 Amp Alternator; Auxiliary External Transmission Oil Cooler; Heavy-Duty Air Filter; Skid Plates; Compass; 4.2" Diagonal Color Display Driver Info Center; Electrical Lock Control Steering Column; Trailering Package; 120-Volt Instrument Panel Power Outlet; Heated Driver and Front Outboard Passenger Seating; Off-Road Suspension; Front Premium Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; GMC Connected Access Capable; Color-Keyed Carpeting Floor Covering; OnStar and GMC Connected Services Capable; Power Front Passenger Windows with Express Up/down; 2-Speed Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bed Liner with AT4 Logo; Power Rear Windows with Express Down; Red Recovery Hooks; Integrated Trailer Brake Controller; Power Front Windows with Driver Express Up/down; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel and Telescoping Steering Column; 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; Auto-Locking Rear 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
- MulitPro Audio System by Kicker
- 20" X 9" 6-Spoke Carbon Gray Painted Aluminum Wheels
- All-Weather Floor Liners with AT4 Logo
- 275/60R20SL AT BW Tires
- Apple CarPlay/Android Auto smart device mirroring
- Forward Collision Alert with Automatic Braking
- Front Pedestrian Braking
- 4G LTE Wi-Fi Hotspot capable mobile hotspot internet access
- HD Rear Vision Camera w/Hitch View rear mounted camera
- Lane Keep Assist with Lane Departure Warning
- Adaptive cruise control
- Head-up display
- Brake assist system
- Cruise control with steering wheel mounted controls
- Ventilated driver and front passenger seats
- Integrated navigation system
- Keyfob remote start
- Heated steering wheel
- Heated driver and front passenger seats
- Heated rear seats
- Leather front seat upholstery
- Primary monitor touchscreen
- Rear Cross-Traffic Alert collision warning
- First-row sliding and tilting glass sunroof with express open/close activation sunshade
- Driver seat power reclining
- lumbar support
- cushion tilt
- fore/aft control and height adjustable control
- AutoTrac part and full-time 4WD
- Duramax 3L I-6 diesel direct injection
- DOHC
- variable valve control
- intercooled turbo
- diesel
- engine with 277HP
- Duramax 3L I-6 DOHC
- Front wireless smart device charging
- Teen Driver restricted driving mode/alerts
- Smart key with hands-free access and push button start
- Keyfob window control
- Aerial view camera
- Push-button
- Video-feed rearview mirror
- Bluetooth wireless audio streaming
- Hitch Guidance vehicle to trailer hitching assist
- Front mounted camera
- Right side camera
- Pickup box camera
- Left side camera
- Lane Change Alert with Side Blind Zone Alert blind spot warning
- Following Distance Indicator
- GMC ProGrade Trailering System trailer light test
- GMC ProGrade Trailering System trailer light malfunction warning
- GMC ProGrade Trailering System trailer theft alarm
- Dual-zone front climate control
- IntelliBeam auto high-beam headlights
- Immobilizer
- Bose speakers
- Bluetooth handsfree wireless device connectivity
- Trailer brake controller
- Trailer Sway Control (TSC) trailer sway control
- Trailering Assist Guidelines vehicle and trailer reverse assist with visual graphic guidance only
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