This 2021 GMC Sierra 1500 AT4 brings premium truck capability with a turbocharged 3.0L diesel engine paired with a 10-speed automatic transmission and 4WD. The crew cab short box configuration offers comfortable seating for five with a spacious bed, finished in striking gray exterior with jet black leather accents inside. With 68,684 miles on the odometer, this Sierra delivers solid performance with EPA-estimated 22 city / 26 highway MPG—Actual mileage may vary—and includes a power sunroof, technology package, and diesel engine block heater for cold-weather reliability.
- Power sunroof
- GMC Infotainment System with navigation and Apple CarPlay/Android Auto
- Heated and ventilated front seats with 10-way power adjustment
- HD surround vision with trailer-view cameras
- Remote vehicle starter system
- Multicolor 15" head-up display
- Automatic emergency braking with lane keep assist
- Premium Bose audio system
- Spray-on bed liner with AT4 logo
- Integrated trailer brake controller
This AT4 delivers everything you need for work and weekend adventures. The driver alert package, automatic high beam technology, and comprehensive camera system provide confidence on any terrain, while the heated steering wheel and premium leather seating ensure comfort on every drive. Come see this Sierra in person and experience the combination of luxury and capability firsthand.
Although every reasonable effort has been made to ensure the accuracy of the information contained on this site, absolute accuracy cannot be guaranteed. This site, and all information and materials appearing on it, are presented to the user "as is" without warranty of any kind, either express or implied. All vehicles are subject to prior sale. Price does not include applicable tax, title, license, processing and/or documentation fees. ‡Vehicles shown at different locations are not currently in our inventory (Not in Stock) but can be made available to you at our location within a reasonable date from the time of your request, not to exceed one week. Residency restrictions may apply.
2021 GMC Sierra 1500 AT4for sale in Mechanicsburg, PA
- Used
- Diesel
Fred Beans Cadillac GMC of Doylestown
Call 215-345-7222
We’re here to help
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- GMC Sierra 1500
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- 2021 GMC Sierra 1500
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The overview
- Exterior Color
- Satin Steel
- Interior Color
- Jet Black
- Odometer
- 68,684 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Seats
- 5 seats
- Fuel Economy
- 16/21 MPG City/Hwy
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4WD
- Engine
- I-6 cyl
- VIN
- 1GTU9EET4MZ267781
- Stock Number
- B604261
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
Optional add-on protection
- GAP Protection
- Lifetime Powertrain
- Tires and Wheels
- Paint Protection
A name you can trust
Fred Beans Hyundai Mechanicsburg is dedicated to your satisfaction before, during, and after your purchase. We'll go the extra mile to take care of you.
More about usKBB.com Consumer Reviews
4.0out of 5 overall- 4.0
Depreciation of 50%
by Manny A on 10/28/2026 10:06:36 AM
This is a amazing truck.. Comfortable lots of sensors Etc…. My truck has 30000 miles I when to trade in they offer $46000 I paid $86000 the depreciation is incredible I don’t buy new truck never again. - 5.0
2021 GMC SLT 4WD SIERRA, Great Truck
by Ransom1 on 10/15/2026 4:18:42 PM
This is my 8th truck. This is hands down the very best truck I’ve ever owned. Not only is it the best looking truck on the road I have never had it in the shop except for oil changes and scheduled maintenance. The silver does not show dirt or grime. - 5.0
Great 4 cylinder truck
by Steve on 9/23/2026 2:01:15 AM
I have only pulled a trailer one time and still got 18 mpg down doing 80 down the interstate. Otherwise this vehicle is used for commuting or recreating. I typically get 22-24 mpg driving MT highways to the mountains. The turbo has some spunk for getting up to speed and the five years I've had my truck no complaints.
*Tax, tags, title, not included.
Although every reasonable effort has been made to ensure the accuracy of the information contained on this site, absolute accuracy cannot be guaranteed. This site, and all information and materials appearing on it, are presented to the user "as is" without warranty of any kind, either express or implied. All vehicles are subject to prior sale. Prices include all costs to be paid by a consumer, except for licensing costs, registration fees, and taxes. ‡Vehicles shown at different locations are not currently in our inventory (Not in Stock) but can be made available to you at our location within a reasonable date from the time of your request, not to exceed one week.
What is included in our price - Vehicle pricing includes all offers and incentives. Prices on New and Pre-owned vehicles also include a documentary service fee*. Due to limited inventory, offers and pricing are all subject to change. Tax, Title, and Tags are not included in vehicle price shown and must be paid by the purchaser. Doc fees vary by location. All prices include applicable manufacturer rebates and incentives (dealer retains incentives). Incentives and pricing may depend on manufacturer incentive program expiration dates which can vary. Additional rebates and incentives like military, loyalty, diplomat or college graduation may apply and may give you additional savings; but are conditional in advertised prices. See the dealer for further details.
All pricing includes documentary service fee of $490 in Pennsylvania, and $594 in New Jersey. However, this fee does not include payment for the preparation of state tag, title, and registration fees.
Although every reasonable effort has been made to ensure the accuracy of the information contained on this site, absolute accuracy cannot be guaranteed. This site, and all information and materials appearing on it, are presented to the user "as is" without warranty of any kind, either express or implied. All vehicles are subject to prior sale. Prices include all costs to be paid by a consumer, except for licensing costs, registration fees, and taxes. ‡Vehicles shown at different locations are not currently in our inventory (Not in Stock) but can be made available to you at our location within a reasonable date from the time of your request, not to exceed one week.
What is included in our price - Vehicle pricing includes all offers and incentives. Prices on New and Pre-owned vehicles also include a documentary service fee*. Due to limited inventory, offers and pricing are all subject to change. Tax, Title, and Tags are not included in vehicle price shown and must be paid by the purchaser. Doc fees vary by location. All prices include applicable manufacturer rebates and incentives (dealer retains incentives). Incentives and pricing may depend on manufacturer incentive program expiration dates which can vary. Additional rebates and incentives like military, loyalty, diplomat or college graduation may apply and may give you additional savings; but are conditional in advertised prices. See the dealer for further details.
All pricing includes documentary service fee of $490 in Pennsylvania, and $594 in New Jersey. However, this fee does not include payment for the preparation of state tag, title, and registration fees.
