The 2025 GMC Yukon AT4 Ultimate combines the AT4 approach to terrain capability with a more elaborate interior and technology package. It is not simply an appearance upgrade: the standard equipment mix is substantially different from the regular AT4. Whether that difference is worth paying for depends on which features you will actually use.
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Models available
Elevation, AT4, Denali, AT4 Ultimate and Denali Ultimate form the 2025 Yukon range. AT4 Ultimate sits above AT4 in price and equipment, while Denali offers a different comparison for buyers whose priorities are more focused on cabin features. Keep the body length constant when comparing costs: the XL is a separate extended configuration. Canadian Yukon trim catalog.
Engine and transmission
The AT4 Ultimate catalog lists the 6.2-litre V8 as standard, with a ten-speed automatic and four-wheel drive. GMC’s Canadian 2025 specifications rate the engine at 420 hp and 460 lb-ft. The available 3.0-litre Duramax diesel is rated at 305 hp and 495 lb-ft. The trim badge alone does not identify the installed engine. Canadian standard-equipment list; Canadian engine specifications.
For a purchase comparison, get the engine identified on each quote. Do not compare a diesel configuration with a gasoline configuration as though the only difference were the trim badge.
Suspension and terrain equipment
GMC’s Canadian introduction specifies a front skid plate, 20-inch wheels with all-terrain tires and four-corner Air Ride Adaptive Suspension for AT4 Ultimate. It describes up to two inches of additional height for off-road clearance. AT4 Ultimate launch details.
For your own use, consider the surfaces you actually travel on and inspect the tire specification rather than judging by appearance alone. On a used example, check the suspension’s operation and maintenance history. Terrain equipment does not remove the need to respect vehicle limits or choose suitable tires for winter conditions.
Towing and payload
A tow rating must match body, engine, equipment and loading. Do not transfer an XL rating or the Yukon range’s maximum onto this vehicle. Check the owner documentation, installed trailering package and actual payload label before pairing it with a trailer. Passengers, cargo and tongue weight all consume carrying capacity.
Fuel economy
NRCan’s 2025 Yukon 4WD reference ratings are 16.6 L/100 km city, 13.0 highway and 15.0 combined with the 6.2-litre V8. The 3.0-litre diesel is listed at 11.5/9.7/10.7. NRCan does not break these rows down specifically by AT4 Ultimate trim, so match the actual engine and configuration. NRCan 2025 ratings.
At a hypothetical 20,000 km annually, those combined ratings represent 3,000 litres for the V8 or 2,140 litres for diesel. Apply the appropriate local fuel price and consider purchase cost, service requirements and your driving pattern. The lower consumption number alone does not calculate total ownership cost.
Interior and comfort
AT4 Ultimate’s Canadian catalog includes full-grain leather seating, front massage, front ventilation and a power-release second-row bucket arrangement. Those comfort features are a meaningful part of the step above AT4. Canadian seating specifications.
Technology and driver assistance
The AT4 Ultimate equipment list includes Super Cruise, a rear camera mirror and an 11-inch driver information display. Night Vision is listed as optional. Do not infer Night Vision from a camera or from the Ultimate name; confirm the specific build and working menus. AT4 Ultimate technology list; Night Vision option listing.
Super Cruise requires compatible roads and an active trial or paid subscription. The included trial described at launch runs from delivery, and the driver must remain attentive. It does not turn the Yukon into an autonomous vehicle. Canadian Super Cruise conditions.
Canadian standard-length Yukon trim comparison
Current Canadian manufacturer pricing for these exact 2025 configurations has not been verified as of October 31, 2026. Vehicle prices and price differences are therefore omitted; the chart compares equipment only.
| 2025 Yukon trim | Why compare it? |
|---|---|
| Elevation — 5.3L | 16.8-inch infotainment, heated front seats and 10-speaker Bose audio. |
| AT4 — 5.3L | All-terrain tires, front skid plate and Magnetic Ride Control. |
| Denali — 6.2L | 6.2L V8, 15-inch head-up display and power-sliding console. |
| AT4 Ultimate — 6.2L | Air suspension, massaging front seats, full-grain leather and 18-speaker Bose audio. |
Equipment references: Canadian dealer equipment catalogues: 2025 Elevation, 2025 AT4, 2025 Denali and 2025 AT4 Ultimate.
Moving from AT4 to AT4 Ultimate also changes the standard engine from 5.3 to 6.2 litres; it is not simply an upholstery change. Match the engine and desired option packages before evaluating the two configurations.
Who should consider AT4 Ultimate?
Shortlist AT4 Ultimate if you want its terrain-oriented equipment and its higher-level cabin together. If only one side of that combination matters, compare a regular AT4 or Denali with the specific features you want. The right choice depends on your configuration and use, not just the most expensive badge.
Frequently asked questions
Is AT4 Ultimate the same as Yukon XL?
No. AT4 Ultimate is a trim; XL is the extended body. This article and equipment chart concern standard-length Yukon.
Is Night Vision included automatically?
No. The Canadian AT4 Ultimate catalog used here lists it as optional, so inspect the individual build.
Is diesel pricing included?
No. The equipment chart compares gasoline configurations. Current manufacturer pricing for the exact diesel configuration has not been verified.