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  New and used
  2026 GMC Sierra 1500 AT4 trucks
  for sale
  
  
    near
Bull Valley, IL 
    
  
      - 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.
  
 
            
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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Bill was fantastic to work with!
Bill was fantastic to work with! Whole process took only a couple of hours and everyone was very helpful. Pricing was transparent and they worked with me to get me best interest rate possible.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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We purchased a used car from Robert and he was extremely
We purchased a used car from Robert and he was extremely respectful and went out of his way to be helpful. We needed to get a car trailer to get the car back to Louisville Kentucky. He was able to find one and reserve it for us. Everyone at the dealership was very nice and helpful. We enjoyed dealing with everyone. We will always remember the great service and friendly staff. We will remember them if we make any future car purchases.
 
          
        
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2026 GMC Sierra 1500 AT4
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Chris does an outstanding job every time I visit.
Chris does an outstanding job every time I visit. He is very accommodating and always aware of my needs and my time. Only place I service all my vehicles (3) and drive 30 minutes even though there are 2 Chevy dealers much closer.
 
          
        
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2026 GMC Sierra 1500 AT4
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Excellent as well as timely service.
Excellent as well as timely service. However, was not told in advance that paying with Credit Card would have a 3% fee.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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Palmen GMC/Cadillac- Kenosha, Wisconsin
I have worked with Dan Salisbury for years in regard to leasing various cars. Dan works very hard to find what I am looking for within the payment range I need. Dan never makes me feel bad for additional requests or continued questions. If there are any problems they are quickly resolved. During this last lease I had pleasure of also working with Alfonso Gomez. He was very quick at resolving small issue that I had immediately. Jason Garon in the service department is always amazing about getting my car for any oil changes or needed work. I am happy to recommend this team to others.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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I arrived late to pick up my vehicle.
I arrived late to pick up my vehicle. Fortunately one of the Service writers noticed my arrival as he was leaving for the night. He came back to the dealership and secured my vehicle and billing. Great service.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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Jamie L was our sales consultants, he was fantastic and
Jamie L was our sales consultants, he was fantastic and so was the dealership Jamie made the experience very pleasant and would highly recommend going to Woody Gmc to purchase a car and ask for Jamie for their sales consultant. We couldn’t be happier,
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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Buying my Camaro from Castle Chevrolet in McHenry was an
Buying my Camaro from Castle Chevrolet in McHenry was an outstanding experience from start to finish. I worked with Eric Loredo, who set the tone by doing a full virtual walk around and video of the car before I arrived, answering all my questions in real time. When my wife and I landed at ORD, the car was spotless and ready to go. Finance Manager Mike Lazzara had all documents sent ahead so I could DocuSign, making the delivery quick and smooth. Sales Manager Matt Knudson, GSM Jerry Spanier, and Andrew Sytsma (who wasn’t my salesman but still took time to chat and share product knowledge) all played a part in making this one of the easiest purchases I’ve ever had. The team knew my previous car was totaled in a tornado, and they went above and beyond to make this out-of-state transaction simple and stress-free. Eric and the entire Castle team reminded me that buying a car doesn’t have to be a battle. I would absolutely buy from them again.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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They really made this a smooth experience.
They really made this a smooth experience. Especially when it came to the actual purchase of the vehicle. We dealt with Nick as our sales person and he was great at communicating with us and insuring any needs or concerns were addressed.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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BEST SERVICE
They picked up my car from home and had it back to me so quickly!!!
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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Great staff and very good deals on new vehicles.
Great staff and very good deals on new vehicles. Quick, friendly and very helpful. I would recommend if your looking for a great deal check with these guys first. They will get you that Great deal others can't.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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My sales person at Castle Chevrolet was Tony Twall.
My sales person at Castle Chevrolet was Tony Twall. He was awesome to work with. He answered all my questions and was very knowledgeable. I have to say that this was the best vehicle buying experience I have ever had. My next purchase will be with the Castle dealership in McHenry IL and I will ask for Tony to be my sales person.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
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2026 GMC Sierra 1500 AT4
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It is a service business.
My wife and I recently purchased a new car for her at Kunes of Belvidere. I am in sales and I have purchased many cars over the years. I’m not easily impressed but, I have to say, “Mo” Owaynat the general sales manager and numbers guy went over and above to get a deal done for me and my wife. On top of being a really nice guy, he worked hard to get a deal done that fit our needs and I felt the whole time like he was working as much for me as he was working for the dealership. He is a good human being. Go talk to him and you’ll see what I mean. And our experience with our sales person, Robert “Brinck” Brinckerhoff was fantastic. Being in sales, I very much appreciated his congeniality, low pressure approach, and his customer centric interaction. I felt like I made a friend. If you’re in the market for a car, go see “Brinck
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VVVal
Kim was incredible in helping me get my repairs covered by my extended warranty! Details of service were provided and car was ready when needed.
There are 9 matching cars close to your year range.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2024 GMC Sierra 1500 AT4
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2024 GMC Sierra 1500 AT4
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2025 GMC Sierra 1500 AT4
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2024 GMC Sierra 1500 AT4
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            Used
2025 GMC Sierra 1500 AT4
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2025 GMC Sierra 1500 AT4
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2025 GMC Sierra 1500 AT4
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2025 GMC Sierra 1500 AT4
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2025 GMC Sierra 1500 AT4
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About the 2026 GMC Sierra 1500 AT4
AT4 shown.
- Seating
- 5
- Door count
- 4
- Drivetrain
- Four Wheel Drive
- Combined MPG
- 23
- Transmission
- 10-Speed A/T
- Engine
- 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)
How much does the 2026 GMC Sierra 1500 AT4 cost?
The 2026 GMC Sierra 1500 AT4 price depends on optional features. Prices typically start at $66,800.
What is the MPG of the 2026 GMC Sierra 1500 AT4?
The 2026 GMC Sierra 1500 AT4 offers up to 21 MPG in city driving and 24 MPG on the highway for a combined rating of 23 MPG.
These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle options, driving conditions, driving habits, vehicle maintenance, and other factors.
What are some similar vehicles and competitors of the 2026 GMC Sierra 1500 AT4?
The 2026 GMC Sierra 1500 AT4 compares to and/or competes against the following vehicles:
AT4 (2 styles)
| Style | |
|---|---|
| 4WD Crew Cab 147" AT4 | 4WD Crew Cab 157" AT4 | 
| Inventory price | |
| Starting at $66,800 | Starting at $67,300 | 
| Combined MPG | |
| 23 | 23 | 
| Engine | |
| 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline 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 1500 trims
- 
  
    GMC Sierra 1500 2026 Elevation
  
  95 listings starting at $44,000 
- 
  
    GMC Sierra 1500 2026 SLT
  
  60 listings starting at $54,870 
- 
  
    GMC Sierra 1500 2026 Denali
  
  54 listings starting at $62,250 
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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.

