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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 43272
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Est. $400 /mo*
Down Payment
$0
Net trade-in value
$0
Months
72
APR
7.0%
Sales tax
0.0%

*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.

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2021 GMC Sierra 2500 AT4
2021 GMC Sierra 2500 AT4
2021 GMC Sierra 2500 AT4
2021 GMC Sierra 2500 AT4
2021 GMC Sierra 2500 AT4
2021 GMC Sierra 2500 AT4 View all 39 photos

Used

2021 GMC Sierra 2500 AT4

80,939 mi.
$54,488
Est. $1,003/mo*
Free CARFAX Report
Byers Ford
(922 reviews)
Delaware, OH (23 mi.)
Call Check availability Check availability

Vehicle information

Ext. color: Onyx Black
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 #: F250108B
VIN: 1GT49PEYXMF210915

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

Byers Ford review

I recently had the pleasure of purchasing a 2023 Ford

March 17, 2025
By James G from New Albany

I recently had the pleasure of purchasing a 2023 Ford Bronco from Byers Ford, and I couldn’t be more thrilled with the experience, especially since I made the purchase on a Sunday! From the moment I arrived, I was greeted by a welcoming team that made me feel right at home. Despite it being a Sunday, the staff at Byers Ford were fully engaged, offering exceptional service and answering all of my questions without hesitation. My sales representative, Jeff Ashbrook, was outstanding—he was knowledgeable, patient, and made sure I understood all the features of the Bronco. He was never pushy and genuinely wanted to make sure I was making the best decision for my needs. The entire process was smooth and enjoyable. Jeff walked me through all the details, provided transparent pricing, and helped me navigate the financing options with ease. His professionalism and attention to detail made a big difference in my overall experience. The 2023 Ford Bronco itself is absolutely fantastic—rugged yet refined, with all the modern features I was looking for in a vehicle. Overall, buying my Bronco from Byers Ford was an outstanding experience, and I highly recommend them—especially if you’re looking for top-notch service on a Sunday. A huge thank you to Jeff Ashbrook and the team for making the process so easy and enjoyable!

2021 GMC Sierra 2500 AT4 review

Beautiful truck

October 24, 2023
By T Jones from Oakland Ca
Owns this car

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 2 matching cars close to your year range.

2023 GMC Sierra 2500 AT4
2023 GMC Sierra 2500 AT4
2023 GMC Sierra 2500 AT4
2023 GMC Sierra 2500 AT4
2023 GMC Sierra 2500 AT4
2023 GMC Sierra 2500 AT4 View all 34 photos

Used

2023 GMC Sierra 2500 AT4

37,244 mi.
$62,104
Est. $1,144/mo*
Free CARFAX Report
MAG Midwestern - Audi Bentley BMW JLR
Dublin, OH (13 mi.)
Call Check availability Check availability

Vehicle information

Ext. color: Ebony Twilight 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 #: BM18364B
VIN: 1GT49PEY0PF155718

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
2022 GMC Sierra 2500 AT4
2022 GMC Sierra 2500 AT4
2022 GMC Sierra 2500 AT4
2022 GMC Sierra 2500 AT4
2022 GMC Sierra 2500 AT4
2022 GMC Sierra 2500 AT4 View all 32 photos

Used

2022 GMC Sierra 2500 AT4

56,740 mi.
$57,980
Est. $1,068/mo*
Free CARFAX Report
Hugh White Chevrolet Nissan
Lancaster, OH (25 mi.)
Call Check availability Check availability

Vehicle information

Ext. color: White
Int. color: Jet Black
Drivetrain: Four-wheel Drive
Fuel type: Diesel
Transmission: 10-Speed Automatic
Engine: 6.6L V8 32V DDI OHV Turbo Diesel
Stock #: 15614750
VIN: 1GT19PEY6NF151754

Features

Convenience: Cooled Seats, Heated Seats, Heated Steering Wheel, Keyless Entry, Keyless Start, Remote Start
Entertainment: Apple CarPlay®, Bluetooth®, Premium Sound System, Satellite Radio, USB Port
Exterior: Alloy Wheels, Tow Hitch, Tow Hooks
Safety: Backup Camera, Brake Assist, Stability Control
Seating: Leather Seats, Memory Seat
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GMC Sierra 2500 prices by year

Model year Prices from Deals
2025 GMC Sierra 2500 AT4 $67,939 13 Great deals
2024 GMC Sierra 2500 AT4 $56,900 255 Good deals
2023 GMC Sierra 2500 AT4 $50,972 6 Great deals
2022 GMC Sierra 2500 AT4 $36,952 16 Great deals
2020 GMC Sierra 2500 AT4 $39,994 31 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 $57,212, with pricing starting at $36,992.

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.

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Basics
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Sierra 2500 trims
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‡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.
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GMC Sierra 2500 trims
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