Seating layout and option packages make a substantial difference to the 2027 GMC Yukon AT4. The V8, four-wheel drive and rugged exterior establish its character, but buyers still have to decide how much luxury and trailering equipment they need. The standard-length body offers three rows; the longer XL deserves its own cargo-space comparison.
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2027 GMC Yukon models available
For manufacturer comparisons, this guide uses GMC Canada’s 2026 Yukon information. That range includes Elevation, AT4, Denali, AT4 Ultimate and Denali Ultimate. The accompanying walkaround features a 2027 standard-length AT4; Yukon XL is the longer body style.
AT4 adds a distinctive front fascia, recovery hooks and all-terrain equipment to the family-SUV formula. AT4 Ultimate is a separate trim with a different luxury specification; an AT4 fitted with option packages does not become an Ultimate. Compare the actual equipment list before deciding whether a heavily optioned AT4 or a higher trim offers the better fit.
2027 GMC Yukon AT4 engine specifications
The walkaround quotes 355 hp and 383 lb-ft for its 5.3-litre V8. GMC Canada’s 2026 reference lists the standard 5.3-litre EcoTec3 V8 at 355 hp at 5,600 rpm and 383 lb-ft at 4,100 rpm, paired with a ten-speed automatic and four-wheel drive. Its engine description includes direct injection, variable valve timing and Dynamic Fuel Management.
The AT4 has an active two-speed Autotrac transfer case and a front skid plate. Its equipment also includes 20-inch wheels and all-terrain tires. Magnetic Ride Control and available Air Ride Adaptive Suspension are different systems: electronically controlled damping does not mean every AT4 has the optional height-adjustable air suspension.
GMC Canada’s 2026 AT4 reference also offers the 6.2-litre V8 and 3.0-litre Duramax turbo-diesel. Confirm availability and package requirements for a 2027 order; a higher trim’s engine or a diesel vehicle’s fuel figures should not be attributed to the featured 5.3-litre model.
2027 GMC Yukon AT4 towing capacity and payload
As a 2026 Canadian reference, GMC’s selected 5.3-litre AT4 4WD build lists 7,700 lb of maximum trailering. That figure applies to the reference configuration, rather than establishing the limit of the 2027 vehicle shown. Engine, trailering equipment and loading must match the actual vehicle’s documentation.
Before matching a trailer, check the vehicle’s trailering label, hitch requirements and available payload. Passengers, luggage, accessories and trailer tongue weight all use carrying capacity. A trailer below the advertised tow ceiling can still leave too little capacity for a full family and its luggage. Use the loaded trailer weight, not just its empty weight.
Available trailering equipment includes additional camera provisions, Hitch View and Blind Zone Steering Assist with Trailering. These can help with visibility and manoeuvring, but they do not increase the vehicle’s weight limits on their own.
Fuel economy and fuel costs
For comparison, GMC Canada’s 2026 Yukon 4WD 5.3-litre reference lists 15.8 L/100 km city and 12.2 highway. The 2026 Canadian fuel-consumption guide lists 14.2 combined on regular gasoline. These are 2026 reference figures, not a certified 2027 rating; use the actual AT4’s Canadian label when comparing operating costs.
Build a fuel budget using the confirmed consumption figure for the chosen engine, expected annual distance and an explicitly stated fuel-price assumption. Towing, winter temperatures, idling and the balance of city and highway travel can change the result.
Interior, seating and cargo space
The AT4 in the walkaround has seven seats, with second-row captain’s chairs and a three-seat third row. The captain’s chairs have individual armrests, slide forward and back, and recline. The second-row seats are heated. For the wider model range, GMC Canada’s 2026 AT4 information lists seating for up to eight; that Canadian model-year information is used as the reference here.
GMC Canada’s 2026 regular-length Yukon reference lists 722 litres behind the third row, 2,053 litres behind the second row and 3,477 litres with both rear rows folded. These are labeled 2026 comparison figures, rather than confirmed 2027 measurements. Compare luggage room with the passenger seats you need still in use; folding a row removes those seating positions.
The practical test is whether your stroller, sports bags or travel cases fit behind the third row. Check access to the rear seats with child seats installed, too. Captain’s chairs can provide a centre passage, while a bench preserves an extra seating position. For buyers regularly carrying seven or eight people and bulky luggage, the Yukon XL deserves a separate comparison.
Measure the actual vehicle against the garage and parking space. Include mirrors, door-opening clearance and room for the liftgate, rather than relying only on a body-length figure.
Infotainment and technology
A 16.8-inch portrait-oriented Premium GMC Infotainment System is the centrepiece of the dashboard. GMC Canada’s 2026 AT4 equipment list includes Google built-in compatibility, wireless Apple CarPlay and Android Auto, a Bose ten-speaker audio system, an 11-inch digital Driver Information Centre and wireless phone charging. Check the featured vehicle’s own equipment list for its exact configuration.
Connected navigation, in-vehicle apps, mobile connectivity and smartphone projection are different functions. Ask which services remain available after included trials expire, and which require a data plan or subscription. Bring your own phone to check pairing and familiar apps before purchase.
The Technology Package can add a Rear Camera Mirror and 15-inch head-up display. A power-sliding centre console depends on the specified equipment combination. Do not assume those features are standard simply because they appear on a particular dealer vehicle.
Safety and driver-assistance features
GMC Canada’s 2026 AT4 equipment reference includes adaptive cruise control, front collision warning and mitigation, blind-spot monitoring, lane departure warning and lane keeping assistance. Surround-view cameras, rear parking assistance, rear pedestrian alert and rear cross-traffic-related assistance help address visibility around this large SUV. Confirm the 2027 vehicle’s installed equipment and system instructions.
Super Cruise is available through specified packages. Confirm that the vehicle is equipped, the applicable service period and road-coverage requirements; ordinary adaptive cruise control is not the same feature. Driver-assistance systems have operating limits and require attention. A long equipment list also does not establish a particular crash-test score for the 2027 model.
2027 GMC Yukon AT4 pricing and option packages
The equipped AT4 in the walkaround is presented at approximately $117,000 CAD. That is the price quoted in the video, rather than a nationwide starting MSRP or a current transaction quote. Engine, seating and option packages affect the equipped total.
An AT4 with Premium Plus and second-row bucket seats is a different specification from a basic AT4. Check the vehicle’s own window sticker before comparing its equipped total with another trim.
Compare itemized quotes with matching equipment. Premium Plus can bundle trailering, suspension, technology and convenience upgrades, so the price difference may involve several useful features rather than one cosmetic change. Request a clear total showing options, freight, levies, applicable taxes and dealer charges. Availability and offers can change.
Competition and buying considerations
The Chevrolet Tahoe Z71 is a useful comparison for buyers considering a similarly focused full-size SUV. The Ford Expedition Tremor is another relevant alternative when rugged equipment and family practicality are both priorities. Compare the actual seating layouts, cargo space with the third row occupied and configuration-specific towing ratings.
Within GMC’s range, an Elevation may suit buyers who primarily need passenger space, while AT4 Ultimate deserves a look when luxury equipment dominates the options list. Yukon XL addresses a different question: whether the regular body’s remaining cargo space is enough when the family is aboard.
The strongest reason to choose the AT4 is its particular combination of cabin space, four-wheel-drive hardware and trim equipment. Start with the seats and loaded towing needs you actually require, then price the packages. Browse our SUV reviews for more vehicle comparisons.
AT4, Ultimate or XL: where to spend the budget
The AT4 makes the most sense when you want the two-speed transfer case, underbody protection and all-terrain equipment as well as three rows. If the appeal is mainly a more elaborate cabin, compare the regular Denali and AT4 Ultimate before adding multiple luxury packages to an AT4. A longer XL solves a luggage-space problem that a more expensive trim cannot.
| Your priority | The useful comparison | What decides it |
|---|---|---|
| Carry eight people | Bench-seat AT4 versus a captain’s-chair build | The second-row bench preserves one additional seat. |
| Keep luggage space with every row occupied | Regular Yukon versus Yukon XL | Compare the space behind the raised third row before choosing luxury options. |
| Buy comfort and driver technology | Optioned AT4 versus AT4 Ultimate or Denali | Match air suspension, audio, seating and Super Cruise line by line. |
| Tow near the quoted maximum | The exact engine, trailering equipment and vehicle labels | Factory towing equipment and the loaded vehicle’s limits matter more than the badge. |
Compare the complete package breakdown with an AT4 Ultimate or Denali quote. Identify which seats, suspension, trailering and technology features account for the price difference, and whether the household will use them.
For a family using all three rows daily, I would settle the seating and body length first. The AT4’s equipment is the reason to choose this trim; paying more for the interior will not create more luggage room behind the third row. If a trailer is part of the plan, establish its loaded weight and hitch load before deciding how much of the remaining budget to spend on options.
Frequently asked questions
Does the 2027 Yukon AT4 have seven or eight seats?
The reviewed AT4 has seven seats and second-row captain’s chairs. GMC Canada lists seating for up to eight for the 2026 AT4, which is the Canadian manufacturer reference used for the wider seating options in this guide.
Is air suspension standard on every AT4?
No. Magnetic Ride Control should not be confused with available Air Ride Adaptive Suspension. Check the package list for the vehicle being considered.
Does every AT4 have the same towing limit?
No. Engine, factory equipment, loading and hitch requirements affect the limit. Use the individual vehicle’s labels and matching manufacturer trailering instructions.
Are the displayed fuel-economy figures verified for 2027?
The figures in this guide are explicitly labeled 2026 Canadian comparison references. They are not certified 2027 ratings. Use the actual vehicle’s Canadian fuel-consumption label for the 2027 model.
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