2026 GMC Sierra 1500 AT4X: Strength and Comfort around Walla Walla, WA

*Not actual model

Lewiston GMC – 2026 GMC Sierra 1500 AT4X: Strength and Comfort around Walla Walla, WA

If your weekends involve muddy trailheads, rutted fire roads, and steep descents that reward skill and composure, the Sierra 1500 AT4X was built for that rhythm. GMC engineered this trim with a hardware-first approach: front and rear electronic locking differentials for true left-right parity when traction is scarce, and Multimatic® DSSV dampers tuned to manage high-frequency chatter and low-speed articulation. The result is a truck that feels uncommonly planted on the move and patient when you need to crawl. Layer in an AEV-stamped steel front bumper with front winch capability and a stamped boron steel AEV front approach skid plate, and you have genuine protection that invites exploration. Yet inside, the AT4X is unexpectedly serene — 16-way power front seats with heat, ventilation, and a massage feature turn long miles into an easy ride, while the 13.4-inch Premium GMC Infotainment System with Google built-in ensures your trail maps and playlists are always in reach.

Everyday usefulness matters, too. The MultiPro™ Tailgate creates six configurations for staging gear, stepping into the bed, or setting up a work surface for camp prep. Hill Descent Control helps maintain a composed pace down loose or rocky grades, and the available 6.2L V8 with a 10-speed automatic pairs decisive power with smooth downshifts when you need engine braking on the way back to pavement. You can also add a spray-on bedliner to handle rough cargo, and the available AT4X AEV Edition turns the ruggedness dial even higher with additional skid plates and AEV badging. In the cabin, wireless phone projection keeps wires out of your way, while OnStar® Basics provides added security with features like Automatic Crash Response. For buyers who want a rig that’s as prepared for daily errands as it is for a trailhead two hours away, AT4X is a compelling fit.

• Differentials: Front and rear electronic locking differentials maximize traction over uneven terrain.
• Dampers: Multimatic® DSSV dampers improve control and durability on rough surfaces.
• Armor: AEV-stamped steel front bumper and boron steel AEV approach skid plate add robust protection.
• Seating: 16-way power front seats with heat, ventilation, and massage enhance long-distance comfort.
• Tech Suite: 13.4-inch infotainment with Google built-in and wireless phone projection streamlines navigation and media.

1. Assess your route: Identify ground clearance needs and traction demands before you build your AT4X.
2. Choose your power: The available 6.2L V8 offers assertive response for climbs and loaded travel.
3. Prep for towing: Add the ProGrade® Trailering System if hauling an overland trailer is on your list.
4. Protect your bed: Select a spray-on bedliner to stand up to recovery gear and camp equipment.
5. Dial in comfort: Use the massaging seats to stay fresh on extended drives to and from the trail.

When you’re ready to feel the difference that the right off-road chassis makes, schedule a closer look at AT4X with Lewiston Chevrolet GMC. Our team is serving Moscow, Walla Walla, and Coeur d’Alene, and we’ll tailor a walkthrough to your routes, your gear, and your towing plans. From traction strategies to cargo management, we’ll help you configure an AT4X that fits your life from Monday through Sunday.

Frequently Asked Questions:

Does the AT4X include front and rear locking differentials?

Yes. AT4X features front and rear electronic locking differentials — a combination designed to maximize traction when surfaces and wheel speeds vary dramatically.

What protection does the AT4X include from the factory?

AT4X adds robust protection, including an AEV-stamped steel front bumper with front winch capability and a stamped boron steel AEV front approach skid plate. The AT4X AEV Edition adds even more coverage and AEV design cues.

Is the AT4X comfortable for long road trips?

Absolutely. The 16-way power heated and ventilated front seats with a massage feature, plus refined cabin tuning and premium materials, make the AT4X an excellent long-distance companion.

What technology stands out on AT4X?

The 13.4-inch Premium GMC Infotainment System with Google built-in, wireless phone projection, available 15-inch Head-Up Display, Hill Descent Control, and available trailering tools provide a confident, connected driving experience.

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