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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 1500 SLT trucks
for sale
near
Harvard, 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.

New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great customer service, was wonderful working with
Great customer service, was wonderful working with Jessica and Moe. I will be back again.






New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
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.






New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
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.






New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Super honest deal.
Super honest deal. Used car as advertised, no surprises, no pressure. They detailed it for us while we did the paperwork.

New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Lamia was Amazing!
Lamia was Amazing!! She was so friendly, personable and I walked out with the car I wanted!!!






New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
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.






New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Excellent service
Anytime I call and let them know that there’s a problem with my vehicle I bring it in and they take care of it. Found out yesterday that there’s something wrong with my transmission. Thank God for their warranties. I have a special needs son and I need a bigger vehicle and because of them I have that bigger vehicle.






New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Ms. B
Excellent, from the day I walked in to finance my truck every member from Sales to Finance were 100% committed to the sale. My process was hassle free



New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Excellent service from start to finish.
Excellent service from start to finish. They have the best selection of truck campers and they set me up with everything I needed and demonstrated how it all works. Very Nice :)






New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
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.
New
2026 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great people to help in getting the car I wanted.
Great people to help in getting the car I wanted. The service to make things happen that insured trust and honesty was greatly appreciated. Thank You.
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2026 GMC Sierra 1500 SLT
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2026 GMC Sierra 1500 SLT
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2026 GMC Sierra 1500 SLT
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New
2026 GMC Sierra 1500 SLT
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2026 GMC Sierra 1500 SLT
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New
2026 GMC Sierra 1500 SLT
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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.
**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
31 listings starting at $47,003
-
GMC Sierra 1500 2026 SLT
31 listings starting at $57,745
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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.