Vehicle Details
2026 GMC Sierra 1500 AT4X 4WD 6 Cyl 3.0L Diesel Mountain Home, ID Ready for rugged work and refined comfort, this 2026 GMC Sierra 1500 AT4X with 4WD and the efficient 6-cylinder 3.0L diesel delivers strength, towing capability, and excellent fuel economy. Located in Mountain Home, ID, this GMC Sierra AT4X comes loaded with premium features designed for drivers who demand capability and tech: leather seats, steering wheel audio controls, Apple CarPlay, adaptive cruise control, and remote start. The AT4X trim includes off-road-tuned suspension, skid protection, and advanced traction systems to confidently tackle trails and highways alike. This GMC Sierra is competitively priced and represents the best price available in the region for comparable 2026 AT4X models exceptional value for a diesel-powered, well-equipped truck. The interior is crafted for long drives with comfortable leather seating, intuitive infotainment with seamless smartphone integration via Apple CarPlay, and handy steering wheel controls for safer operation on the road. Adaptive cruise control adds convenience and safety on highway trips, while remote start ensures cabin comfort in Mountain Home's changing seasons. Contact us today to schedule a test drive in Mountain Home, ID, and see why this 2026 GMC Sierra 1500 AT4X 4WD with 3.0L diesel is the top choice for capability, comfort, and the best price.
Equipment
An off-road package is equipped on this vehicle. The installed navigation system will keep you on the right path. This 2026 GMC Sierra 1500 features a hands-free Bluetooth phone system. Protect this model from unwanted accidents with a cutting edge backup camera system. This 1/2 ton pickup features steering wheel audio controls. This 1/2 ton pickup's Lane Departure Warning helps keep you in your lane. This GMC Sierra offers Apple CarPlay for seamless connectivity. The leather seats in the GMC Sierra are a must for buyers looking for comfort, durability, and style. Lane Keep Assist in the GMC Sierra helps maintain safe driving by gently steering to stay within the lane. The GMC Sierra has auto-adjust speed for safe following. The GMC Sierra offers Android Auto for seamless smartphone integration. Keep your hands warm all winter with a heated steering wheel in this 2026 GMC Sierra 1500 . Engulf yourself with the crystal clear sound of a BOSE sound system in this vehicle.
Packages
Preferred Equipment Group 4SG: Trailer Side Blind Zone Alert; Power Sliding Rear Window with Rear Defogger; Ultrasonic Front and Rear Park Assist; Trailer Camera Provisions; Electric Rear-Window Defogger; Theft Deterrent System (unauthorized Entry); Gloss Black Header with Dark Nickel Grille Insert Bars; Front Rain-Sensing Wipers; Heavy-Duty Air Filter; Skid Plates; 120-Volt Interior Power Outlet; Heated Driver and Front Outboard Passenger Seating; Wireless Charging; Front Premium Floor Liners with Removable Carpet Insert; Color-Keyed Carpeting Floor Covering; OnStar Services Capable; Driver-Selectable Full-Locking Front Differential; Heated 2nd Row Outboard Seats; Off-Road Suspension; Power Front Passenger Windows with Express Up/down; Driver-Selectable Full-Locking Rear Differential; Power Rear Windows with Express Down; Integrated Trailer Brake Controller; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Power Rake and Telescoping Steering Column; Power Sunroof; Multicolor 15" Diagonal Head-Up Display;
New 2026 GMCSierra 1500 AT4X
- Diesel
- Exterior Color
- Coastal Dune
- Interior Color
- Obsidian Rush, Full grain leather front seat trim
- Fuel Economy
- 19/20 MPG City/Hwy
- Transmission
- Automatic
- Drivetrain
- 4WD
- Engine
- 3.0L Duramax® Turbo Diesel engine
- VIN
- 3GTUUFE89TG256144
- Stock Number
- HG06061
GMC
Sierra 1500
Included Packages & Accessories
Dealer Notes
KBB.com Consumer Reviews

Overall4Out of 5
- 3.0
Nice truck
By froggy | on Sunday, December 06, 2020
I purchased this truck brand new and at 3900 miles I started to have a misfire. The warranty put a refurbished rebuilt engine in it. I was not aware that the warranty doesn't put new parts in just refurbished rebuilt parts. I traded in and lost my favorite blue truck. Not a fan of the whole process. Love the truck just not how the warranty went. I would not own another brand or model the 2020 is the nicest riding and looking. Just got a bad motor from the manufacture.… - 5.0
Great Truck
By Mel | on Sunday, April 25, 2021
I love it, I get compliments every where I go, and it apparently worth more than I paid for it brand new, a year and a half later. can't ask for much more than that.… - 5.0
Well done GM
By Tony | on Thursday, November 26, 2020
This truck has a 10 speed transmission that you can barely feel it shift. Traded in an F150 and test drove a similar equipped Ram. Although the Ram was nice, the styling of the GMC won me over, along with the tailgate! It also pulls my boat way better than the Ford, just smoother all around. The cabin is very quiet and the gas mileage is much better than V8 Ford. The cabin is super quiet and the ride is awesome. Love the adaptive cruise control too. The technology is fine and the screen is plenty big. Remember, you are driving this truck, not going to thr drive in! Most importantly, the controls are simple to use and Bose stereo sounds great! Oh, and I got it cheaper than the similar Ram too!…
Based on 89 consumer ratings for 2019–2026 models. | Privacy
* MSRP is the Manufacturer's Suggested Retail Price (MSRP) of the vehicle. It does not include any taxes, fees or other charges. Pricing and availability may vary based on a variety of factors, including options, dealer, specials, fees, and financing qualifications. Consult your dealer for actual price and complete details. Vehicles shown may have optional equipment at additional cost.
* The estimated selling price that appears after calculating dealer offers is for informational purposes, only. You may not qualify for the offers, incentives, discounts, or financing. Offers, incentives, discounts, or financing are subject to expiration and other restrictions. See dealer for qualifications and complete details.
* The advertised price does not include sales tax, vehicle registration fees, other fees required by law or finance charges. A doc fee, up to $499, may be added to the price of the vehicle.
* Images, prices, and options shown, including vehicle color, trim, options, pricing and other specifications are subject to availability, incentive offerings, current pricing and credit worthiness.
* In transit means that vehicles have been built, but have not yet arrived at your dealer. Images shown may not necessarily represent identical vehicles in transit to your dealership. See your dealer for actual price, payments and complete details.
- MSRP
- $84,980
- Savings
- -$6,764
- Better Way Price
- $78,216
- $1,750 Purchase Allowance on this 2026 GMC Sierra 1500 modelDetails
- -$1,750
- $500 Bonus Cash on this 2026 GMC Sierra 1500 modelDetails
- -$500
- Best Price*
- $75,966
- $500 GM Military Offer on this 2026 GMC Sierra 1500 modelDetails
- -$500
- $2,500 Trade Assistance on this 2026 GMC Sierra 1500 modelDetails
- -$2,500
- Conditional Final Price
- $72,966
- We're here to help: (208) 580-7318
NEW
2026 GMC Sierra 1500 Truck AT4X
Exterior Color: Coastal Dune
Interior Color: Obsidian Rush, Full grain leather front seat trim
Vin Number: 3GTUUFE89TG256144
Stock: HG06061
View this 2026 GMC Sierra 1500 Truck AT4X for sale at Mountain Home Auto Ranch near Twin Falls.
- We're here to help: (208) 580-7318




