Skip to main content

Contact seller

Contact seller

By clicking here, you authorize Cars.com and its sellers/partners to contact you by text/calls which may include marketing and be by autodialer. Calls may be prerecorded. You also agree to our Privacy Notice. Consent is not required to purchase goods/services.

We value your privacy. Cars.com Privacy Notice

Customize your budget

Est. max vehicle price based on your desired monthly budget (...% APR*. and ...% sales tax)
$...*
See matching cars

*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.

**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.

About your privacy: Cars.com is asking for your ZIP and credit rating because it helps us to make an educated guess at your sales tax and loan interest. These two factors can greatly change your monthly payment.

Used 2021 GMC Sierra 2500 AT4 trucks for sale near me

Filters 6 Year Trim Model Price & payment Make Mileage All filters
1 match 30 miles from 20149
Be the first to know!

Save your search and get notified when new inventory arrives.

Prequalify now

It only takes a few minutes and won't affect your credit.

Get Prequalified
Est. $400 /mo*
Down Payment
$0
Net trade-in value
$0
Months
72
APR
7.0%
Sales tax
0.0%

Vehicle information

Ext. color: Pacific Blue Metallic
Int. color: Jet Black w/Kalahari Accents
Drivetrain: Four-wheel Drive
Fuel type: Diesel
Transmission: Automatic
Engine: Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
Stock #: 40081A
VIN: 1GT49PEY8MF219547

Features

Convenience: Cooled Seats, Heated Seats, Heated Steering Wheel, Keyless Entry, Keyless Start, Navigation System, Remote Start
Entertainment: Android Auto®, Apple CarPlay®, Bluetooth®, Premium Sound System, USB Port, WiFi Hotspot
Exterior: Alloy Wheels, Sunroof/Moonroof, Tow Hitch, Tow Hooks
Safety: Automatic Emergency Braking, Backup Camera, Blind Spot Monitor, Brake Assist, LED Headlights, Lane Departure Warning, Rear Cross Traffic Alert, Stability Control
Seating: Leather Seats, Memory Seat

Reviews

Leesburg Buick GMC review

I had a wonderful experience with Caleb Polen, both

I had a wonderful experience with Caleb Polen, both trading in my vehicle and purchasing the new one. I would highly recommend Leesburg Buick GMC and Caleb.

2021 GMC Sierra 2500 AT4 review

Beautiful truck

I love my 2021 GMC Denali 2500HD. I have gotten more complements on this truck than any other vehicle that I have owned. I get great highway fuel milage average 19-26mpg,which is great for a heavy duty truck!

There are 4 matching cars close to your year range.

Vehicle information

Ext. color: Dark Sky Metallic
Int. color: Jet Black w/Kalahari Accents
Drivetrain: Four-wheel Drive
Fuel type: Diesel
Transmission: Automatic
Engine: Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
Stock #: CEC6974A
VIN: 1GT49PEY1LF287588

Features

Convenience: Cooled Seats, Heated Seats, Heated Steering Wheel, Keyless Entry, Keyless Start, Navigation System, Remote Start
Entertainment: Android Auto®, Apple CarPlay®, Bluetooth®, Premium Sound System, USB Port, WiFi Hotspot
Exterior: Alloy Wheels, Sunroof/Moonroof, Tow Hitch, Tow Hooks
Safety: Automatic Emergency Braking, Backup Camera, Blind Spot Monitor, Brake Assist, LED Headlights, Lane Departure Warning, Rear Cross Traffic Alert, Stability Control
Seating: Leather Seats, Memory Seat

Vehicle information

Ext. color: Cayenne Red Tintcoat
Int. color: Jet Black w/Kalahari Accents
Drivetrain: Four-wheel Drive
Fuel type: Diesel
Transmission: Automatic
Engine: Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
Stock #: S7287
VIN: 1GT49PEY2PF185383

Features

Convenience: Cooled Seats, Heated Seats, Heated Steering Wheel, Keyless Entry, Keyless Start, Navigation System, Power Folding Mirrors, Power Liftgate, Remote Start
Entertainment: Android Auto®, Apple CarPlay®, Bluetooth®, HomeLink, Premium Sound System, Satellite Radio, USB Port, WiFi Hotspot
Exterior: Alloy Wheels, Sunroof/Moonroof, Tow Hitch, Tow Hooks
Safety: Automatic Emergency Braking, Backup Camera, Blind Spot Monitor, Brake Assist, LED Headlights, Lane Departure Warning, Rear Cross Traffic Alert, Stability Control
Seating: Leather Seats, Memory Seat

Vehicle information

Ext. color: Forest Metallic
Int. color: Jet Black w/Kalahari Accents
Drivetrain: Four-wheel Drive
Fuel type: Diesel
Transmission: Automatic
Engine: Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
Stock #: P8952
VIN: 1GT49PEY5PF102559

Features

Convenience: Heated Seats, Heated Steering Wheel, Keyless Entry, Keyless Start, Navigation System, Remote Start
Entertainment: Android Auto®, Apple CarPlay®, Bluetooth®, Premium Sound System, USB Port, WiFi Hotspot
Exterior: Alloy Wheels, Tow Hitch, Tow Hooks
Safety: Automatic Emergency Braking, Backup Camera, Brake Assist, LED Headlights, Stability Control
Seating: Leather Seats

Vehicle information

Ext. color: Summit White
Int. color: Jet Black w/Kalahari Accents
Drivetrain: Four-wheel Drive
Fuel type: Diesel
Transmission: Automatic
Engine: Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
Stock #: P8826
VIN: 1GT49PEY6NF136166

Features

Convenience: Cooled Seats, Heated Seats, Heated Steering Wheel, Keyless Entry, Keyless Start, Navigation System, Remote Start
Entertainment: Android Auto®, Apple CarPlay®, Bluetooth®, Premium Sound System, USB Port, WiFi Hotspot
Exterior: Alloy Wheels, Tow Hitch, Tow Hooks
Safety: Automatic Emergency Braking, Backup Camera, Brake Assist, LED Headlights, Stability Control
Seating: Leather Seats, Memory Seat
  • Prev
  • 1
  • Next

GMC Sierra 2500 prices by year

Model year Prices from Deals
2025 GMC Sierra 2500 AT4 $67,939 12 Great deals
2024 GMC Sierra 2500 AT4 $56,900 229 Good deals
2023 GMC Sierra 2500 AT4 $52,472 112 Good deals
2022 GMC Sierra 2500 AT4 $38,114 22 Great deals
2020 GMC Sierra 2500 AT4 $40,995 38 Good deals

About the 2021 GMC Sierra 2500 AT4

Basics

Base shown (base trim).

Seating
3
Door count
2
Drivetrain
Rear-wheel drive
Combined MPG
0
Transmission
6-Speed A/T
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
Side view of the 2021 GMC Sierra 2500 AT4
FAQs

How much does the 2021 GMC Sierra 2500 AT4 cost?

The 2021 GMC Sierra 2500 AT4 price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 2500 AT4 is $56,677, with pricing starting at $38,497.

What are some similar vehicles and competitors of the 2021 GMC Sierra 2500 AT4?

The 2021 GMC Sierra 2500 AT4 compares to and/or competes against the following vehicles:


Is the 2021 GMC Sierra 2500 AT4 reliable?

The 2021 GMC Sierra 2500 has an average reliability rating of 4.1 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 2500 owners.

Is the 2021 GMC Sierra 2500 AT4 a good truck?

Below are the Cars.com consumer ratings for the 2021 GMC Sierra 2500.

(28 reviews)
Rating breakdown (out of 5):
  • Comfort 4.8
  • Interior 4.6
  • Performance 4.4
  • Value 4.0
  • Exterior 4.6
  • Reliability 4.1
Ratings (28 reviews)

78% of drivers recommend this car

Rating breakdown (out of 5):
  • Comfort 4.8
  • Interior 4.6
  • Performance 4.4
  • Value 4.0
  • Exterior 4.6
  • Reliability 4.1

*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.

**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.

1 match Clear
Clear
Basics
GMC models
Sierra 2500 trims
Price & payment Full Price Monthly
Monthly budget search results are estimated based on a 72-month loan term with $0 down payment, $0 trade-in value, 0.0 % sales tax and 7.0 % APR. Inputs can be personalized using the calculator.
Financing
Deal rating
Vehicle history
Style
Body style
Cab type
Exterior color
Interior color
Performance
Transmission
Drivetrain
Cylinders
Fuel type
EV range
EV charge time
Features
Convenience
Entertainment
Exterior
Safety
Seating
Door count
Seller info
Seller type
Keyword
Update
Show only

GMC Sierra 2500 trims

[{"applied_filter_criteria":"{\"cpo_indicator\":false,\"make_model_trim\":[{\"trim\":\"at4\",\"make\":\"gmc\",\"model\":\"sierra_2500\"}],\"max_year\":\"2021\",\"min_year\":\"2021\",\"search_range\":\"30\",\"shippable\":true,\"sort_field\":\"searchRank1\",\"sort_order\":\"desc\",\"stock_type\":\"used\"}","search_type":"general-inventory-search","vehicle_array":[{"trim":"AT4","make":"GMC","cat":"truck_fullsize","year":"2021","customer_id":"6069106","stock_type":"Used","certified_preowned":false,"listing_id":"1f784328-d5b7-46c8-aba5-5dc3b03c0b4c","mileage":"44669","sponsored":false,"model":"Sierra 2500","nvi_program":false,"vin":"1GT49PEY8MF219547","exterior_color":"Pacific Blue Metallic","fuel_type":"Diesel","interior_color":"Jet Black w/Kalahari Accents","msrp":"0","drivetrain":"Four-wheel Drive","dealer_name":"Leesburg Buick GMC","dealer_zip":"20176","seller_type":"dealership","price":"62499","sponsored_type":"standard","bodystyle":"Truck","cpo_indicator":false,"badges":["good_deal","hot_car"],"canonical_mmt":"GMC:Sierra 2500:AT4","canonical_mmty":"GMC:Sierra 2500:AT4:2021","cpo_package":null,"photo_count":47,"stock_sub":"","vertical_position":1},{"trim":"AT4","make":"GMC","cat":"truck_fullsize","year":"2020","customer_id":"2621","stock_type":"Used","certified_preowned":false,"listing_id":"e2845db8-d698-48ff-993b-7fa96131ec41","mileage":"68055","sponsored":false,"model":"Sierra 2500","nvi_program":false,"vin":"1GT49PEY1LF287588","exterior_color":"Dark Sky Metallic","fuel_type":"Diesel","interior_color":"Jet Black w/Kalahari Accents","msrp":"0","drivetrain":"Four-wheel Drive","dealer_name":"Sheehy Ford Lincoln of Gaithersburg","dealer_zip":"20879","seller_type":"dealership","price":"55000","sponsored_type":"standard|similar_years","bodystyle":"Truck","cpo_indicator":false,"badges":["good_deal"],"canonical_mmt":"GMC:Sierra 2500:AT4","canonical_mmty":"GMC:Sierra 2500:AT4:2020","cpo_package":null,"photo_count":30,"stock_sub":"","vertical_position":2},{"trim":"AT4","make":"GMC","cat":"truck_fullsize","year":"2023","customer_id":"100275","stock_type":"Used","certified_preowned":false,"listing_id":"fa9bac41-cbce-400c-8660-a993c66d7cf1","mileage":"49207","sponsored":false,"model":"Sierra 2500","nvi_program":false,"vin":"1GT49PEY2PF185383","exterior_color":"Cayenne Red Tintcoat","fuel_type":"Diesel","interior_color":"Jet Black w/Kalahari Accents","msrp":"0","drivetrain":"Four-wheel Drive","dealer_name":"Country Diesels","dealer_zip":"20186","seller_type":"dealership","price":"68850","sponsored_type":"standard|similar_years","bodystyle":"Truck","cpo_indicator":false,"badges":["good_deal","price_drop_in_cents"],"canonical_mmt":"GMC:Sierra 2500:AT4","canonical_mmty":"GMC:Sierra 2500:AT4:2023","cpo_package":null,"photo_count":54,"stock_sub":"","vertical_position":3},{"trim":"AT4","make":"GMC","cat":"truck_fullsize","year":"2023","customer_id":"172435","stock_type":"Used","certified_preowned":false,"listing_id":"32b8fc81-b8d7-4f86-b50f-5e9f8fa69a6e","mileage":"62864","sponsored":false,"model":"Sierra 2500","nvi_program":false,"vin":"1GT49PEY5PF102559","exterior_color":"Forest Metallic","fuel_type":"Diesel","interior_color":"Jet Black w/Kalahari Accents","msrp":"0","drivetrain":"Four-wheel Drive","dealer_name":"Country Chevrolet, Inc. (Warrenton)","dealer_zip":"20186","seller_type":"dealership","price":"62777","sponsored_type":"standard|similar_years","bodystyle":"Truck","cpo_indicator":false,"badges":["good_deal","price_drop_in_cents"],"canonical_mmt":"GMC:Sierra 2500:AT4","canonical_mmty":"GMC:Sierra 2500:AT4:2023","cpo_package":null,"photo_count":56,"stock_sub":"","vertical_position":4},{"trim":"AT4","make":"GMC","cat":"truck_fullsize","year":"2022","customer_id":"172435","stock_type":"Used","certified_preowned":false,"listing_id":"95757f64-b36e-4fe5-9c04-cb9abba55cc6","mileage":"58310","sponsored":false,"model":"Sierra 2500","nvi_program":false,"vin":"1GT49PEY6NF136166","exterior_color":"Summit White","fuel_type":"Diesel","interior_color":"Jet Black w/Kalahari Accents","msrp":"0","drivetrain":"Four-wheel Drive","dealer_name":"Country Chevrolet, Inc. (Warrenton)","dealer_zip":"20186","seller_type":"dealership","price":"57777","sponsored_type":"standard|similar_years","bodystyle":"Truck","cpo_indicator":false,"badges":["good_deal","price_drop_in_cents"],"canonical_mmt":"GMC:Sierra 2500:AT4","canonical_mmty":"GMC:Sierra 2500:AT4:2022","cpo_package":null,"photo_count":47,"stock_sub":"","vertical_position":5}],"sponsored_type_eligible":["inventory_ad"]}]