Experience rugged capability and premium refinement with this 2021 GMC Sierra 1500 AT4, a truck engineered to deliver power, style, and innovation both on and off the road. With only 39,000 miles, this Sierra stands out as a well-maintained, low-mileage option for anyone seeking a powerful half-ton pickup with true off-road pedigree.
Under the hood, the commanding 6.2L V8 engine provides exceptional performance, delivering robust horsepower and torque that makes towing, hauling, or conquering rough terrain effortless. The AT4s off-road suspension, skid plates, and AT4 High Clearance Step enhance capability while maintaining everyday practicality. Paired with GMCs trail-ready engineering, this truck is equally confident on highways, job sites, and backcountry trails.
Finished in a striking Onyx Black exterior, this Sierra AT4 is complemented by bold 20-inch aluminum wheels, aggressive styling cues, and signature AT4 badging that distinguish it from the crowd. The design balances strength and sophistication, projecting a modern, upscale presence that GMC trucks are known for.
Inside, the cabin blends durability with refinement. The interior features Jet Black leather with Kalahari accents, creating a premium environment with sporty contrast. Thoughtful ergonomics, intuitive technology, and high-quality materials ensure comfort on every drive. With advanced infotainment, driver-assist features, and spacious seating, the Sierra AT4 provides convenience and confidence whether youre commuting or adventuring off the grid.
If youre looking for a truck that delivers the perfect mix of power, ruggedness, and refinement, this 2021 GMC Sierra 1500 AT4 with the 6.2L V8 is an outstanding choice. With its low mileage, premium features, and trail-ready design, its built to exceed expectations.
Used 2021 GMCSierra 1500 AT4 4WD Crew Cab 147 AT4 8for Sale in Michigan City
- Exterior Color
- Onyx Black
- Interior Color
- Jet Black With Kalahari Accents
- Odometer
- 39,510 miles
- Transmission
- Automatic
- Engine
- 8
- VIN
- 3GTP9EEL0MG403790
- Stock Number
- P1230
Included Packages & Accessories
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
- Auxilliary engine cooler
- 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/metal-look 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
- Remote window operation
- 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
KBB.com Consumer Reviews
- 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!