2021 GMC Sierra AT4
GMC Sierra Details
Automatic
6 Cyl, 3.0L
Onyx Black
4WD
Diesel
87,187 Miles
Jet Black w/Kalahari Accents
3P768
3GTU9EET2MG139880
1500
Leather
AT4
About This 2021 GMC Sierra
Vehicle Details
This 2021 GMC Sierra 1500 AT4 4WD with the efficient 3.0L Duramax I6 diesel delivers capability, comfort, and advanced safety for drivers in Rainbow City, AL. Built for towing and long hauls, the diesel six-cylinder engine balances strong torque with impressive fuel economy, while the AT4 trim adds off-road-ready suspension, skid plates, and a refined interior for confident adventures. Inside, enjoy Hands Free Bluetooth for seamless calling and media, adaptive cruise control for relaxed highway driving, and lane departure warning to help maintain safe positioning. Cross-traffic alert increases awareness when backing from parking spots, and this specific truck carries a CARFAX 1-Owner history, reflecting responsible prior ownership and documented maintenance. The exterior blends rugged styling with functional features, including 4WD capability to tackle wet, snowy, or uneven terrain. Comfort-focused amenities and thoughtful driver aids make daily commutes and weekend trips equally enjoyable. Whether you need a dependable work truck or a versatile family hauler, this GMC Sierra 1500 AT4 strikes an excellent balance of performance and refinement. Located in Rainbow City, AL, this GMC Sierra is competitively priced to move—offering the best price among similar local listings. Schedule a test drive to experience the diesel torque, AT4 capability, and feature-rich cabin firsthand. Financing options are available to qualified buyers.
Equipment
It warns of approaching vehicles with Cross-Traffic Alert. An off-road package is installed on this 2021 GMC Sierra 1500 so you are ready for your four-wheeling best. This 1/2 ton pickup features a hands-free Bluetooth phone system. The leather seats in this GMC Sierra are a must for buyers looking for comfort, durability, and style. The installed navigation system will keep you on the right path. This unit offers Apple CarPlay for seamless connectivity. Lane Keep Assist in this 2021 GMC Sierra 1500 helps maintain safe driving by gently steering to stay within the lane. This unit features a high end BOSE stereo system. The GMC Sierra has auto-adjust speed for safe following. This vehicle is a certified CARFAX 1-owner. Start this vehicle from inside with remote start. See what's behind you with the back up camera on this 2021 GMC Sierra 1500. Keep your hands warm all winter with a heated steering wheel in it .
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. AT4 Premium Package: AT4 High Clearance Step; LT275/65R18C MT BW Tires. 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. 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; 18" X 8.5" Machined Aluminum Wheels; 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. AT4 High Clearance Step. Power Sunroof. Onyx Black. LT275/65R18C MT BW Tires. **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.**
This 2021 GMC Sierra 1500 AT4 4WD with the efficient 3.0L Duramax I6 diesel delivers capability, comfort, and advanced safety for drivers in Rainbow City, AL. Built for towing and long hauls, the diesel six-cylinder engine balances strong torque with impressive fuel economy, while the AT4 trim adds off-road-ready suspension, skid plates, and a refined interior for confident adventures. Inside, enjoy Hands Free Bluetooth for seamless calling and media, adaptive cruise control for relaxed highway driving, and lane departure warning to help maintain safe positioning. Cross-traffic alert increases awareness when backing from parking spots, and this specific truck carries a CARFAX 1-Owner history, reflecting responsible prior ownership and documented maintenance. The exterior blends rugged styling with functional features, including 4WD capability to tackle wet, snowy, or uneven terrain. Comfort-focused amenities and thoughtful driver aids make daily commutes and weekend trips equally enjoyable. Whether you need a dependable work truck or a versatile family hauler, this GMC Sierra 1500 AT4 strikes an excellent balance of performance and refinement. Located in Rainbow City, AL, this GMC Sierra is competitively priced to move—offering the best price among similar local listings. Schedule a test drive to experience the diesel torque, AT4 capability, and feature-rich cabin firsthand. Financing options are available to qualified buyers.
Equipment
It warns of approaching vehicles with Cross-Traffic Alert. An off-road package is installed on this 2021 GMC Sierra 1500 so you are ready for your four-wheeling best. This 1/2 ton pickup features a hands-free Bluetooth phone system. The leather seats in this GMC Sierra are a must for buyers looking for comfort, durability, and style. The installed navigation system will keep you on the right path. This unit offers Apple CarPlay for seamless connectivity. Lane Keep Assist in this 2021 GMC Sierra 1500 helps maintain safe driving by gently steering to stay within the lane. This unit features a high end BOSE stereo system. The GMC Sierra has auto-adjust speed for safe following. This vehicle is a certified CARFAX 1-owner. Start this vehicle from inside with remote start. See what's behind you with the back up camera on this 2021 GMC Sierra 1500. Keep your hands warm all winter with a heated steering wheel in it .
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. AT4 Premium Package: AT4 High Clearance Step; LT275/65R18C MT BW Tires. 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. 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; 18" X 8.5" Machined Aluminum Wheels; 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. AT4 High Clearance Step. Power Sunroof. Onyx Black. LT275/65R18C MT BW Tires. **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.**
Features & Options
- 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
- AT4 Premium Package: AT4 High Clearance Step; LT275/65R18C MT BW Tires
- 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
- 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; 18" X 8.5" Machined Aluminum Wheels; 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
- AT4 High Clearance Step
- Power Sunroof
- Onyx Black
- LT275/65R18C MT 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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