The 2021 GMC Sierra 1500 AT4 4x4 Crew Cab is designed for drivers who demand rugged strength, refined comfort, and the capability to take on the diverse conditions of the Pacific Northwest. With 77,030 miles, this truck has been fully inspected and reconditioned, ready to deliver confidence whether you're navigating Seattle traffic, hauling gear to the Oregon coast, or exploring remote mountain trails.
Finished in striking Cayenne Red Tintcoat, the AT4 stands apart with its factory off-road stance, red recovery hooks, LED lighting, and upgraded steel front bumper with brush guard. A hard retractable tonneau cover and spray-in bedliner with the AT4 logo keep your cargo protected from rain, snow, or dust, while the 120-volt bed-mounted power outlet is perfect for tailgating, tools, or powering up at a campsite.
Inside, the cabin is a blend of rugged functionality and premium refinement. Jet Black leather with Kalahari accents creates a bold, modern contrast, while heated and ventilated front seats, heated rear seats, and a heated steering wheel make cold mornings in the Cascades or wet Northwest winters far more comfortable. Both driver and passenger enjoy 10-way power seats with lumbar support, and driver memory ensures your settings are always ready.
Technology elevates every drive, with a premium Bose 7-speaker sound system, a massive 15" head-up display, a rear camera mirror, and a surround vision camera system with trailer view provisions. Wireless charging, Apple CarPlay, Android Auto, 4G LTE Wi-Fi, and multiple USB ports keep you connected wherever the road takes you. Adaptive cruise control, lane keep assist, blind zone alert, rear cross traffic alert, and a safety alert seat all work together to provide peace of mind in unpredictable conditions.
Performance comes from the powerful and efficient 3.0L Duramax turbo-diesel inline-6 paired with a 10-speed automatic transmission. Known for its smooth torque delivery and outstanding efficiency, this engine makes light work of towing, mountain passes, and long highway stretches. The ProGrade Trailering System, integrated trailer brake controller, hitch view camera, and in-vehicle trailering app make towing boats, campers, or equipment simple and stress-free.
The AT4 is built for adventure with off-road suspension, hill descent control, skid plates, and an auto-locking rear differential. Whether its gravel roads in Eastern Washington, snowy passes in the Cascades, or muddy trails in Oregon's backcountry, this truck is engineered to inspire confidence in all conditions.
With its unique blend of rugged capability, modern technology, and premium comfort, the 2021 GMC Sierra 1500 AT4 4x4 Crew Cab is more than just a truck it's a tool for work, a companion for adventure, and a comfortable daily driver all in one. Perfectly suited for the Pacific Northwest lifestyle, this Sierra is ready for whatever path you choose.
2021 GMC Sierra 1500 AT4
- Used
The overview
- Exterior Color
- Cayenne Red Tintcoat
- Interior Color
- Jet Black
- Odometer
- 77,030 miles
- Body/Seating
- Truck/5 seats
- Fuel Economy
- 16/21 MPG City/Hwy
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4WD
- Engine
- 3.0L I6
- VIN
- 3GTU9EET4MG268350
- Stock Number
- 25-1172B
The highlights
- Leather upholstery
- Automatic temperature control
- Wireless phone connectivity
- Front dual zone A/C
- Auto-dimming rearview mirror
- Split folding rear seat
- Memory seat
- Heated front seats
- Ventilated front seats
- Perimeter/approach lights
- Remote keyless entry
- Heated steering wheel
The full specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Front beverage holders
- Front dual zone A/C
- Heated steering wheel
- Illuminated entry
- Memory seat
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Proximity key: doors and push button start
- Rear beverage holders
- Rear door bins
- Remote engine start: keyfob
- Remote keyless entry
- Speed control
- Telescoping steering wheel
- Tilt steering wheel
- Alloy wheels
- Front anti-roll bar
- Front wheel independent suspension
- Power steering
- Speed-sensing steering
- Tires: all-terrain
- 1st row LCD monitors: 2
- Primary LCD size: 8.0"
- Radio data system
- Smart device integration: Apple CarPlay/Android Auto
- Steering wheel mounted audio controls
- Wireless phone connectivity: Bluetooth
- Front center armrest
- Front seats: bucket
- Heated front 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 highway: 21mpg
- Fuel tank capacity: 24.0gal.
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- Standard fuel economy fuel type: gasoline
- Transmission: 10 speed automatic
- 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")
- Wheelbase: 3,744mm (147.4")
- Appearance: analog
- Compass
- Delay-off headlights
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- 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
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Security system
- Traction control
Notes from the dealer
Peace of mind
Vehicle history report
- Title information
- Odometer readings
- Accident data (if applicable)
- Service history
- Vehicle usage
- Recall information (if applicable)
- Warranty status
A name you can trust
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4out of 5 overall- 3.0
Nice truck
by froggy on Sunday, December 06, 2020
I purchased this truck brand new and at 3900 miles I started to have a misfire. The warranty put a refurbished rebuilt engine in it. I was not aware that the warranty doesn't put new parts in just refurbished rebuilt parts. I traded in and lost my favorite blue truck. Not a fan of the whole process. Love the truck just not how the warranty went. I would not own another brand or model the 2020 is the nicest riding and looking. Just got a bad motor from the manufacture. - 5.0
Great Truck
by Mel on Sunday, April 25, 2021
I love it, I get compliments every where I go, and it apparently worth more than I paid for it brand new, a year and a half later. can't ask for much more than that. - 5.0
Well done GM
by Tony on Thursday, November 26, 2020
This truck has a 10 speed transmission that you can barely feel it shift. Traded in an F150 and test drove a similar equipped Ram. Although the Ram was nice, the styling of the GMC won me over, along with the tailgate! It also pulls my boat way better than the Ford, just smoother all around. The cabin is very quiet and the gas mileage is much better than V8 Ford. The cabin is super quiet and the ride is awesome. Love the adaptive cruise control too. The technology is fine and the screen is plenty big. Remember, you are driving this truck, not going to thr drive in! Most importantly, the controls are simple to use and Bose stereo sounds great! Oh, and I got it cheaper than the similar Ram too!