Certified Used 2021 GMC Sierra 1500 AT4
67,689 mi.
Vehicle Details
Price valid through: July 23, 2026*
– EcoTec3 6.2L V8 with Dynamic Fuel Management (420 hp, 460 lb-ft torque)
– Technology Package with HD Surround Vision, Rear Camera Mirror, and Multicolor 15″ Head-Up Display
– AT4 Premium Package with all-terrain capabilities and high-clearance step
– Driver Alert Package II featuring Forward Collision Alert, Lane Keep Assist, and Automatic Emergency Braking
– 20″ Machined Aluminum Wheels with Carbon Grey Metallic Accents
– Power Sunroof for enhanced driving comfort
– ProGrade Trailering System with Integrated Trailer Brake Controller and Hitch Guidance
– Premium Bose 7-Speaker Sound System with GMC Infotainment
– Heated and Ventilated Front Seats with 10-Way Power Adjustment
– Spray-On Pickup Bed Liner with AT4 Logo
– Apple CarPlay and Android Auto Integration
– 4G LTE Wi-Fi Hotspot and OnStar Connected Services
– Heated Steering Wheel and Power Sliding Rear Window
The cabin reflects GMC’s commitment to driver-focused design. Perforated leather-appointed seating, heated rear outboard seats, and a heated steering wheel create a refined environment regardless of weather conditions. The 8″ digital driver information center and wireless charging keep you informed and connected throughout your day.
Off-road performance is engineered into every detail. The AT4 Value Package includes LT275/65R18C MT blackwall Goodyear Wrangler DuraTrac tires, off-road suspension, and hill descent control. Auto-locking rear differential and red recovery hooks ensure you’re prepared for challenging terrain. The AT4 high-clearance step provides practical access to this full-size crew Cab.
Safety technology works seamlessly to protect you and your passengers. Automatic emergency braking, lane departure warning, and adaptive cruise control monitor road conditions continuously. Forward pedestrian braking, rear cross-traffic alert, and ultrasonic front and rear park assist add layers of protection during everyday driving. The safety alert seat provides tactile feedback when attention is needed.
This Sierra 1500 AT4 delivers the capability and sophistication buyers demand. With EPA ratings of 15 city and 19 highway mpg, the 10-speed automatic transmission optimizes efficiency across diverse driving situations. The crew Cab provides comfortable seating for five, while the Bed liner and storage solutions maximize practicality.
The 2021 GMC Sierra 1500 AT4 stands ready to meet your demands, whether on the job site or the open road. Schedule your visit to experience this truck’s refined power and advanced capabilities firsthand.
Standard Features
- AT4 Preferred Package
- AT4 Premium Package
- AT4 Value Package
- Driver Alert Package I
- Driver Alert Package II
- Preferred Equipment Group 4SB
- Technology Package
- Trailering Package
- 6 Speakers
- 6-Speaker Audio System Feature
- AM/FM radio: SiriusXM with 360L
- Premium audio system: GMC Infotainment System
- Premium Bose 7-Speaker Sound System
- Radio data system
- Radio: Premium GMC Infotainment Sys w/Multi-Touch
- Radio: Premium GMC Infotainment Sys w/Navigation
- SiriusXM w/360L
- Steering Wheel Audio Controls
- Air Conditioning
- Automatic temperature control
- Electric Rear-Window Defogger
- Front dual zone A/C
- Rear window defroster
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 120-Volt Instrument Panel Power Outlet
- Driver Memory
- Memory seat
- Power driver seat
- Power Front Passenger Windows w/Express Up/Down
- Power Front Windows w/Driver Express Up/Down
- Power Rear Windows w/Express Down
- Power steering
- Power windows
- Remote keyless entry
- Remote Vehicle Starter System
- Steering wheel mounted audio controls
- Universal Home Remote
- Auto-Locking Rear Differential
- Electrical Lock Control Steering Column
- Manual Tilt-Wheel & Telescoping Steering Column
- Off-Road Suspension
- 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
- Keyless Open & Start
- Low tire pressure warning
- Occupant sensing airbag
- Overhead airbag
- Power Door Locks
- Power Sunroof
- Brake assist
- Electronic Stability Control
- Hill Descent Control
- Delay-off headlights
- Front fog lights
- Fully automatic headlights
- Perimeter Lighting
- Panic alarm
- Security system
- Theft Deterrent System (Unauthorized Entry)
- Adaptive Cruise Control
- Speed control
- 170 Amp Alternator
- Auxiliary External Transmission Oil Cooler
- Heavy-Duty Air Filter
- AT4 High Clearance Step (LPO)
- Auto-dimming door mirrors
- Body-Color Surround Grille
- Bumpers: body-color
- Heated door mirrors
- IntelliBeam Automatic High Beam On/Off
- LED Cargo Area Lighting
- Power door mirrors
- ProGrade Trailering System
- Rear step bumper
- Rear Wheelhouse Liners
- Spray-On Pickup Bed Liner w/AT4 Logo
- 2 USB Ports
- 2 USB Ports (1st Row)
- 4.2″ Diagonal Color Display Driver Info Center
- 4G LTE Wi-Fi Hotspot Capable
- 8″ Driver Information Center
- Apple CarPlay/Android Auto
- Auto-dimming Rear-View mirror
- Automatic Emergency Braking
- Bed View Camera
- Color-Keyed Carpeting Floor Covering
- Compass
- Driver door bin
- Driver vanity mirror
- Floor-Mounted Center Console
- Following Distance Indicator
- Forward Collision Alert
- Front Pedestrian Braking
- Front Prem Floor Liners w/Removable Carpet Insert
- Front reading lights
- GMC Connected Access Capable
- HD Rear Vision Camera
- HD Surround Vision w/2 Trailer View Camera Provisions
- Heated steering wheel
- Illuminated entry
- Lane Change Alert w/Side Blind Zone Alert
- Lane Keep Assist w/Lane Departure Warning
- Multicolor 15″ Diagonal Head-Up Display
- OnStar & GMC Connected Services Capable
- Outside temperature display
- Overhead console
- Passenger vanity mirror
- Rear Camera Mirror
- Rear Cross Traffic Alert
- Rear Dual USB Charging-Only Ports
- Rear Prem Floor Liners w/Removable Carpet Insert
- Rear reading lights
- Rear seat center armrest
- Rear Underseat Storage (LPO)
- Safety Alert Seat
- Tachometer
- Telescoping steering wheel
- Tilt steering wheel
- Trip computer
- Ultrasonic Front & Rear Park Assist
- Voltmeter
- Wireless Charging
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Front Bucket Seats
- Front Center Armrest
- Heated 2nd Row Outboard Seats
- Heated Driver & Front Outboard Passenger Seating
- Heated front seats
- Perforated Leather-Appointed Front Seat Trim
- Power passenger seat
- Split folding rear seat
- Ventilated Driver & Front Passenger Seats
- Ventilated front seats
- Passenger door bin
- Hitch Guidance
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering App
- Integrated Trailer Brake Controller
- Red Recovery Hooks
- 18″ x 8.5″ Machined Aluminum Wheels
- Alloy wheels
- Wheels: 20″ x 9″ Machined Aluminum
- Deep-Tinted Glass
- Power Sliding Rear Window w/Rear Defogger
- Variably intermittent wipers
- 3.23 Rear Axle Ratio
- FRESH TRADE
- SUNROOF
- AT4 PREMIUM Pkg
- CLEAN CARFAX
VEHICLE DATA
Certain specifications, prices and equipment data have been provided under license from Chrome Data Solutions (\’Chrome Data\’). © 2026 Chrome Data Solutions, LP. All Rights Reserved. This information is supplied for personal use only and may not be used for any commercial purpose whatsoever without the express written consent of Chrome Data. Chrome Data makes no guarantee or warranty, either expressed or implied, including without limitation any warranty of merchantability or fitness for particular purpose, with respect to the data presented here. All specifications, prices and equipment are subject to change without notice.
ESTIMATE MPG
EPA mileage ratings are supplied by Chrome Data Solutions, LP for comparison purposes only. Your actual mileage will vary, depending on how you drive and maintain your vehicle, driving conditions, battery pack age/condition (hybrid models only) and other factors.
Based on 2019 EPA mileage ratings. Your MPGe/MPG and driving range will vary depending on driving conditions, how you drive and maintain your vehicle, battery-pack age/condition, and other factors.
PRICING
Vehicle pricing is believed to be accurate. Tax, title and registration are not included in prices shown unless otherwise stated. Manufacturer incentives may vary by region and are subject to change. Vehicle information & features are based upon standard equipment and may vary by vehicle. Monthly payments may be higher or lower based upon incentives, qualifying programs, credit qualifications, residency & fees. No claims, or warranties are made to guarantee the accuracy of vehicle pricing, payments or actual equipment. Call to confirm accuracy of any information.
Manufacturer’s Rebate subject to residency restrictions. Any customer not meeting the residency restrictions will receive a dealer discount in the same amount of the manufacturer’s rebate.
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