2026 GMC Yukon AT4 Diesel Review: The Celebrity SUV That (Almost) Drives Itself

Some cars you drive and forget. And then there’s the 2026 GMC Yukon AT4 Diesel. After a few days behind the wheel of this beast — graciously loaned by Racine Chevrolet GMC in Saint-Jean-sur-Richelieu — I now fully understand why Hollywood celebrities have adopted it as their unofficial status vehicle. Limousine comfort, off-road capability, and technology straight out of science fiction. Here is my complete review.

A Full-Size SUV That Commands Respect

From the moment it pulls up, the Yukon AT4 turns heads. With its massive grille, AT4-exclusive red tow hooks, and dark exterior trim accents, this vehicle is not trying to be subtle — and it succeeds spectacularly. At over 5 metres long and nearly 2 metres tall, this is presence in its purest form.

The 2026 update brings a completely redesigned front fascia, cleaner aerodynamic lines, and a significantly more refined rear end. GMC clearly listened to its customers: the Yukon now blends rugged truck DNA with genuine luxury in a way very few competitors can match.

The AT4 trim adds specific off-road credentials: a two-inch factory lift, a multi-terrain traction management system, underbody skid plates, and those iconic red recovery hooks. It looks ready for adventure — and it actually is.

The 3.0L Duramax Diesel: The Surprise of the Test Drive

I’ll admit I was skeptical at first. A diesel engine in a full-size luxury SUV? In 2026? But after the first few kilometres on the highway, I was completely won over. The 3.0L Duramax turbo-diesel produces 305 horsepower and an impressive 495 lb-ft of torque — and it delivers that torque from almost idle speed.

The result? Effortless passing on the highway, relaxed merging, and a sense of power that never feels strained. The 10-speed automatic transmission manages everything seamlessly, and fuel consumption sits at approximately 11 to 12 L/100 km — remarkably reasonable for a vehicle of this size and weight.

At highway speeds, the diesel character almost disappears entirely. The engine refinement is exceptional — you barely hear it, and you certainly don’t feel it. This is not the diesel of your grandfather’s pickup. This is a luxury powertrain that happens to be incredibly efficient.

8,000 lbs of Towing: The Number That Impresses

With a maximum towing capacity of 8,000 lbs (approximately 3,628 kg), the Yukon AT4 Diesel is a serious workhorse. Whether you’re hauling a boat to the cottage, a trailer to the job site, or a pair of ATVs to the trails, this SUV handles it all with authority.

The available trailer assist systems make towing accessible even for those without experience. A rear camera, trailer length indicators, and automatic trailer sway control all work together to make every towing experience feel confident. This is the towing capability of a full-size truck wrapped in a premium SUV body.

In-Cabin Technology: Welcome to 2026

Step inside the Yukon AT4 and the technology hits you immediately. An enormous 16.8-inch diagonal infotainment screen dominates the dashboard — but not in an intrusive way. The integrated Google system (Google Maps, Google Assistant, Google Play) means the navigation always knows your environment perfectly.

The 11-inch head-up display is one of the best I’ve ever experienced in any vehicle. Speed, navigation directions, safety alerts — all projected onto the windshield at exactly the right height, keeping your eyes where they belong: on the road.

The Bose 14-speaker Premium Sound System delivers concert-hall audio quality. Whether you’re streaming music, taking calls on speakerphone, or listening to a podcast on a long trip, the acoustic experience inside the Yukon AT4 is exceptional. This is genuinely high-end audio in a vehicle.

Super Cruise: Level 2 Autonomous Driving That Truly Impresses

The highlight of this test drive was undoubtedly the Super Cruise system — GMC’s hands-free highway driving technology. On mapped highways in Canada and the United States, Super Cruise takes over steering, acceleration, and braking completely. You don’t need to touch the wheel.

The system uses a driver attention camera to ensure you’re watching the road. If you look away for too long, it gently alerts you. The result is a genuinely relaxing highway experience — especially on long road trips. I drove for nearly 45 minutes hands-free on the highway, and the system handled every curve and lane change flawlessly.

It’s important to note: Super Cruise is a driver assistance system, not full autonomy. You remain responsible for the vehicle at all times. But as a co-pilot for long highway trips, it’s genuinely impressive and reduces driver fatigue significantly.

Auto Park Assist: Brilliant… and a Little Nerve-Wracking

The Yukon AT4’s Auto Park Assist system parks the vehicle automatically. You select the parking spot, take your hands off the wheel, and the Yukon does the rest — steering, braking, the whole thing. It works remarkably well.

Here’s the honest truth though: it parks very close to neighbouring vehicles. Impressively close. The system’s confidence in its own precision is greater than my own comfort level, at least initially. After a few successful runs, I began to trust it. But the first time? My heart was in my throat.

For those who regularly deal with tight parking in urban environments, this feature will genuinely become indispensable. Once you trust the system — and you will — it eliminates parking stress entirely.

A Dream Ride: Silence, Comfort and Acoustic Insulation

If there’s one thing that defines the overall Yukon AT4 experience, it’s the ride quality. The magnetic ride control suspension (available on AT4 Ultimate) absorbs road imperfections with a refinement that rivals dedicated luxury SUVs. Speed bumps, potholes, rough pavement — they simply disappear beneath you.

The acoustic insulation deserves special mention. GMC has clearly invested heavily in sound deadening: laminated side glass, foam-filled door cavities, and active noise cancellation all work together to create a genuinely serene cabin environment. At 120 km/h on the highway, the interior is remarkably quiet. Conversations are effortless. This SUV genuinely feels like a rolling sanctuary.

The three-row seating configuration accommodates up to nine passengers (depending on configuration), with second-row captain’s chairs available for added comfort. The third row, while tight for adults, is perfectly adequate for children and shorter trips.

Trims and Pricing in Canada

The 2026 GMC Yukon AT4 is available in Canada starting at approximately $79,198 CAD. Here are the main trim levels:

Prices are approximate and may vary by dealer and province. Contact Racine Chevrolet GMC for your personalized quote.

Verdict: 9.0 / 10

The 2026 GMC Yukon AT4 Diesel is one of the most complete vehicles I’ve ever had the pleasure of driving. It combines the practicality of a full-size SUV with technology that feels genuinely futuristic, a diesel powertrain that surprises with its refinement, and a ride quality that puts many dedicated luxury cars to shame.

Is it perfect? Almost. The size makes urban maneuvering an adventure (though Auto Park Assist helps), and the price point is clearly premium. But for a family that needs space, capability, and genuine daily comfort — plus the occasional off-road detour or towing task — the Yukon AT4 Diesel is in a class nearly by itself.

I understand the stars. I get it now.