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New and used
2026 GMC Sierra 1500 AT4 trucks
for sale
near
San Juan Capistrano, 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 1500 AT4
Vehicle information
Features
Reviews
Professional and courteous!
Fantastic dealership with professional and courteous staff.

New
2026 GMC Sierra 1500 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 1500 AT4
Vehicle information
Features
Reviews
Having a recall part replaced was an easy and hassle free
Having a recall part replaced was an easy and hassle free experience. I was able to get an appointment easily and quickly and may car was done within a few hours. I appreciated that they did not try to up sell me on anything.






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Freddie was great…There were a few bumps along the way,
Freddie was great…There were a few bumps along the way, but everything worked out and we now have our 2019 Tahoe

New
2026 GMC Sierra 1500 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 1500 AT4
Vehicle information
Features
Reviews
I am thoroughly satisfied with Temecula Valley Buick
I am thoroughly satisfied with Temecula Valley Buick since I purchased my Encore GX in 2021. Always very personable and keep you informed as to how your service is progressing. William was my service technician today, and when my car was finished he walked me to my car and shook my hand before leaving. Nice gesture!! When my car needs service next time, that for sure will be my go to dealership.






New
2026 GMC Sierra 1500 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 1500 AT4
Vehicle information
Features
Reviews
I called the dealership and spoke to Gary Koch.
I called the dealership and spoke to Gary Koch. I found him to be very personable and knowledgeable. We discussed the online price and agreed to purchase the car. I am not local and handled the preliminary paperwork over the phone. Once everything was confirmed I booked a flight and Gary offered to pick me up. I was in and out of the dealership in less than 90 minutes. Gary made the car buying process super easy and enjoyable. I also received an exceptional deal.






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Felipe was so friendly and helpful when purchasing my
Felipe was so friendly and helpful when purchasing my first EV. The contracts were easy to understand, review and sign.






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Bought truck remotely.
Bought truck remotely. Rigo the sales manager assisted with the purchase. Car showed up later that day and I couldn’t be happier. Followed up the next day to make sure i was all connected. Will recommend this dealership to everyone






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features






New
2026 GMC Sierra 1500 AT4
Vehicle information
Features

New
2026 GMC Sierra 1500 AT4
Vehicle information
Features
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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 SLT
33 listings starting at $58,821
-
GMC Sierra 1500 2026 Elevation
31 listings starting at $49,597
-
GMC Sierra 1500 2026 Denali Ultimate
24 listings starting at $78,893
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