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New and used
2025 GMC Sierra 1500 SLT trucks
for sale
near
Cos Cob, CT
- 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.






Vehicle information
Features
Reviews
Thank you so much!
Thank you so much!! GMC of MahWah!! Knowledge and helpful service, If anyone looking for a car and great deal just go to them and you won’t be disappointed, Shoutout to my SALESMAN!! GERALD PASCUCCI.. He’s the BEST and he will explain everything you need to know and will make your dreams car happen!!
I have the 1500 double cab with standard bed.
I have the 1500 double cab with standard bed. The reason I have this vehicle is I really like the 6.5 foot bed. The crew cab with same bed is just too long. The things I dislike about this model is that it only comes in the SLE model. For the 2025 that means the external mirrors do NOT have a power fold in and it does not have a seat memory for more that one driver. The power fold in for the mirrors is extremely important to me.






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
The Ingersoll employees provide excellent and friendly
The Ingersoll employees provide excellent and friendly service as always whenever I go there for service or to purchase a new car. I highly recommend the dealership.






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Stanley is a professional and great GMC RVC service
Stanley is a professional and great GMC RVC service department representative. He kept me fully informed about my vehicle?s service, and the estimated amount of time for the service.






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Always reliable and outstanding customer service.
Always reliable and outstanding customer service. Waiting area well stocked and comfortable. Staff friendly and informative, attentive to details and future needs. Service department used modern diagnostic equipment that can be reviewed while waiting






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great dealership to work with.
Great dealership to work with. I had the pleasure of dealing with Zeeshan, Willie and Akbar and I have to say it was the best interaction I had in any car sales. They were professional, courteous and actually cared about what we wanted. Most importantly, they were honest. Communication was too notch and I was updated every step of the way by text or call. They went out of their way to make sure we had the best sales experience from beginning to end. The car itself is beautiful and they didn't cut any corners in the sale. I wouldn't hesitate to recommend them to any one and when I'm in the market again will definitely be a return customer.






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
It is no stress when I bring my car to RVC GMC.
It is no stress when I bring my car to RVC GMC. Each person I have dealt with has been helpful, friendly, knowledgeable, and professional. RVC GMC is reliable, efficient, and timely. The waiting room is clean and comfortable. There is a large TV and you can help yourself to a hot drink. I?ve also gotten a courtesy ride home from them.






Vehicle information
Features
Reviews
Great experience purchasing a new Buick Encore GX from a
Great experience purchasing a new Buick Encore GX from a great team. Hugh Middleton was great to work with and he was patient as he explained the process and the numbers and he and his management were great at crafting a deal that was extremely reasonable and the process was smooth and efficient and I was in and out of the dealership in what for me was record time. Definitely the best car purchase experience I've had. If I need to purchase another vehicle I would definitely work with Hugh and his team again. I can't recommend them more highly!!!






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Truck was as advertized very clean well taken care of
Truck was as advertized very clean well taken care of spent a little to much time standing around at dealership I thought things went smoothly with purchase and we were of on our way home.






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Always great customer service.
Always great customer service. Excellent waiting area with fresh coffee and a good choice of goodies while you wait! I love the new computer system showing your car while you wait






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Amazing service team, tech kept vehicle clean and service
Amazing service team, tech kept vehicle clean and service Consultant kept me up to date on my needed services and repair, pricing is affordable and fair






Vehicle information
Features






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
We are happy with the staff and clean environment.
We are happy with the staff and clean environment. Lucas and Rob was really helpful with the purchase.
Vehicle information
Features
Reviews
I recently purchased a used vehicle from Petar Ardeljan
I recently purchased a used vehicle from Petar Ardeljan and it was a pleasure. This dealership operates differently from most as they encompass a no pressure environment and are transparent throughout the process. I would definitely recommend.






New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Seth was incredible to deal with and took all the hassle
Seth was incredible to deal with and took all the hassle out of the process. I was able to get in and out in a timely manner and I?m thrilled with the truck I purchased.

New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Apple play does not work?
The dealer was great. But the apple play in my 2024 Sierra is not yet supported. What the xxxx is that about? How the heck can you sell an incomplete vehicle? I?d like to know when it will be fixed. And it better be soon.

New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Service
Sean my service provider was excellent and insured my interaction with the service department went smoothly.

New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great purchase experience
John McCoy was a great salesman! He was honest, communicated well, and applied no pressure to make a decision. This dealership was the only one on Long Island that was willing to negotiate a deal on the car I purchased. Every other dealer said that they could not lower the price of the car even $1. This is the third vehicle that I purchased or leased from this dealership and I will return when I am ready for my next vehicle.

New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great deal.
Great deal. No gimmicks or nonsense. Thanks Sean for making it such a smooth transaction. When it?s time to for another purchase I will certainly be back.

New
2025 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Buying my Buick was a great experience, they give you
Buying my Buick was a great experience, they give you time to breath while looking around then approach for help and answer questions! Service area is alway great, always work with you to get the appointment you need! Will be leasing my next car from them for sure!!
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About the 2025 GMC Sierra 1500 SLT
SLT shown.
- Seating
- 5
- Door count
- 4
- Drivetrain
- Rear Wheel Drive
- Combined MPG
- 17
- Transmission
- 10-Speed A/T
- Engine
- 305.0-hp, 3.0-liter, Straight 6 Cylinder Engine (Diesel Fuel)

How much does the 2025 GMC Sierra 1500 SLT cost?
The 2025 GMC Sierra 1500 SLT price depends on optional features. Prices typically start at $54,900.
What is the MPG of the 2025 GMC Sierra 1500 SLT?
The 2025 GMC Sierra 1500 SLT offers up to 16 MPG in city driving and 20 MPG on the highway for a combined rating of 17 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 2025 GMC Sierra 1500 SLT?
The 2025 GMC Sierra 1500 SLT compares to and/or competes against the following vehicles:
Is the 2025 GMC Sierra 1500 SLT reliable?
The 2025 GMC Sierra 1500 has an average reliability rating of 5 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2025 Sierra 1500 owners.
100% of drivers recommend this car
- Comfort 5.0
- Interior 5.0
- Performance 5.0
- Value 5.0
- Exterior 4.0
- Reliability 5.0
SLT (3 styles)
Style | ||
---|---|---|
4WD Crew Cab 157" SLT | 2WD Crew Cab 147" SLT | 4WD Crew Cab 147" SLT |
Inventory price | ||
Starting at $58,700 | Starting at $54,900 | Starting at $58,000 |
Combined MPG | ||
16 | 17 | 16 |
Engine | ||
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 305.0-hp, 3.0-liter, Straight 6 Cylinder Engine (Diesel 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 2025 Denali
44 listings starting at $64,778
-
GMC Sierra 1500 2025 Elevation
42 listings starting at $44,495
-
GMC Sierra 1500 2025 SLT
29 listings starting at $59,855
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