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*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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New and used
2026 GMC Sierra 2500 AT4 trucks
for sale
near
Norco, CA
- 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.
**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.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Basic service
I needed a 10k basic service on my vehicle. Everything went well, I will use Hatfield again.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
I personally had a great experience at Hatfield.
I personally had a great experience at Hatfield. No haggling over small stuff, no arguing or fighting over numbers. I highly recommend Hatfield.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
KEEP UP THE GREAT WORK AND CUTOMER SERVICE
Adam Miller in the service department is the best! He is always very friendly, and makes sure my vehicle and I am well taken care of. It seems that nothing has changed at the dealership since it was sold. I am very happy about this. Thanks again for the great customer service!
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Professional and courteous!
Fantastic dealership with professional and courteous staff.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Review
Professional and superb customer service. Was dealing with a check engine light. They go out the way to make sure customer is taken care off.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
positive sales person reasonable price
positive sales person knowledgable, positive kind will go back.. location great ease of access. price taxes dealer prep well explaine4d.. i will re check lot one week new inventory..thanks for opportunity
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Had to get some warranty repairs done.
Had to get some warranty repairs done. Jeff took care of all the processing and we were informed about the progress from start to finish. Professional, courteous customer service.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Quick and easy
Good quick service getting my new towing mirrors installed. Also cleared the check engine light. Steve Pacheco did a great job making the repair happen.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
The experience was great.
The experience was great. Worked the numbers over the phone and nothing changed when I arrived onsite. They value creating long term customers.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Alex is great!
Alex was a pleasure to work with throughout the process. When I expressed my concerns about covid he kindly agreed to wear a mask and arranged for the process to be conducted outdoors as much as possible. He also expedited the sale process because he understood that I needed to drive the vehicle back to the SF Bay Area that day. Lastly, he was very knowledgeable about the Suburban that I purchased, and provided me with a lot of great information about its features and benefits. I wouldn't hesitate to work with Alex again, or to recommend him to others.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Dealer add ons are extremely high, we were able to work
Dealer add ons are extremely high, we were able to work on some of those numbers. Still high after bargaining, but I agreed since I wanted this truck. When Mariah came back with financing option, I come to find out that we can't finance outside, it has to be their financing or pay cash! Can you believe this? After everything done with salesperson, had to wait for finance. Sat for over an hour &1/2. Employess kept walking in & out of finance office, some eating, while customer just waiting.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Staff was friendly but i left without being able to have
Staff was friendly but i left without being able to have my app hooked up to my car and I was looking forward to that feature
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
I had an amazing experience yesterday at Tustin GMC &
I had an amazing experience yesterday at Tustin GMC & Buick with Seth R.. I called him the night before to ask about the Sierra EV 2025, and he got right on it! We got the deal done in minutes, charged up the truck, and it was waiting for me to pick it up the next morning because I couldn?t make it that evening. This dealership is incredible! I usually buy luxury vehicles, and the service was just as great as when I do business with Porsche or Land Rover. George in finance was nothing short of amazing as well. The management is doing an incredible job keeping them going because they have such a great team. Every turn was met with a smile, and even in workout clothing, I felt like a valued customer. Thanks to Seth and George, this dealership is now my new pick-up truck home, and I?ll definitely be buying my pick-up trucks through Tustin GMC & Buick in the future.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Experience was excellent!
Experience was excellent! Everything was so smooth and easy! We are so happy with our purchase! Highly recommend Danny from GMC! Customer service was on point!
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
My experience at the dealership was excellent from start
My experience at the dealership was excellent from start to finish. Abraham greeted me right away, took the time to understand what I needed, and answered every question with patience and detail. The entire process was fast, smooth, and professional. I truly appreciate his outstanding service and the overall efficiency of the team.
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
About the 2026 GMC Sierra 2500 AT4
AT4 shown.
- Seating
- 5
- Door count
- 4
- Drivetrain
- Four Wheel Drive
- Combined MPG
- 0
- Transmission
- 10-Speed A/T
- Engine
- 470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
How much does the 2026 GMC Sierra 2500 AT4 cost?
The 2026 GMC Sierra 2500 AT4 price depends on optional features. Prices typically start at $71,600.
What are some similar vehicles and competitors of the 2026 GMC Sierra 2500 AT4?
The 2026 GMC Sierra 2500 AT4 compares to and/or competes against the following vehicles:
AT4 (2 styles)
| Style | |
|---|---|
| 4WD Crew Cab 172" AT4 | 4WD Crew Cab 159" AT4 |
| Inventory price | |
| Starting at $71,800 | Starting at $71,600 |
| Combined MPG | |
| 0 | 0 |
| Engine | |
| 470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) |
*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.
GMC Sierra 2500 trims
-
GMC Sierra 2500 2026 Denali Ultimate
43 listings starting at $94,113
-
GMC Sierra 2500 2026 Denali
32 listings starting at $80,770
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This vehicle is certified pre-owned, backed by a manufacturer warranty, and typically undergoes a rigorous multi-point inspection to ensure quality and reliability.
This vehicle is currently in high demand given its competitive price, desirable features, and overall condition, and may have a higher chance of selling quickly.
