New Inventory for Jim Gauthier Buick GMC

a. Up to 6,032 kg (13,300 lb), and only with the 3.0L Duramax turbo-diesel.

GM Canada publishes the 13,300 lb maximum but does not publish the exact cab, box and axle combination required to reach it. Treat it as a best-case configuratio

Every trailer rating belongs to a specific truck, not to a brochure. Cab style, box length, axle ratio and equipment all move the number. Before you buy for towing, have us confirm the rating on the actual VIN.

a. This one gets misquoted constantly, so here is the whole answer.

The headline figure of 16,329 kg (36,000 lb) applies only to a 3500HD Regular Cab pulling a gooseneck or fifth-wheel trailer.

On a conventional bumper-pull hitch, every Sierra HD tops out at 9,072 kg (20,000 lb). No trim, no cab, no engine exceeds it.

The available Duramax 6.6L turbo-diesel V8 makes 470 hp and 975 lb-ft. Maximum payload is 3,307 kg (7,290 lb) on a 3500HD Regular Cab. Boxes are 6'9" standard or 8' long.

If a listing tells you a crew cab Denali will pull 36,000 lb on a receiver hitch, it is wrong.

a. AT4 is the off-road trim. AT4X is the off-road trim with the hardware that actually changes what the truck can do.

The short version: AT4 is a trim package with a lift. AT4X adds locking differentials front and rear, position-sensitive DSSV dampers and a steel AEV bumper. If you are running a trail or a field rather than a gravel road, that is the difference you are paying for.

a. Denali is GMC's luxury trim. Denali Ultimate is the top of it.

On the Sierra 1500, Denali comes standard with the 5.3L V8, with the 6.2L V8 or 3.0L Duramax available. Denali Ultimate comes standard with the 6.2L EcoTec3 V8, with the Duramax available.

Denali Ultimate adds exclusive 22" machined aluminum wheels with bright chrome, full-grain leather in Alpine Umber, 16-way heated and ventilated front seats with massage, and standard Super Cruise with a three-year trial. On Denali, Super Cruise is available rather than standard.

On the Yukon, Denali Ultimate adds Air Ride Adaptive Suspension, 24" wheels, an 18-speaker Bose system, available Night Vision and second-row executive seats. Note that Denali Ultimate and AT4 Ultimate Yukons seat seven rather than eight, because the second-row captain's chairs replace the bench.

a. GM Canada announced the redesigned 2027 Sierra 1500 on 25 June 2026 and says the first units are expected at GMC dealerships before the end of calendar 2026.

Six trims: Pro, Elevation, AT4, Denali, Denali Ultimate and AT4X.

The powertrain lineup is new: sixth-generation Small Block V8s in 5.7L and 6.6L, an enhanced TurboMax, and a class-exclusive Duramax diesel, all paired with the ten-speed automatic. GM says the Denali Ultimate will carry the most powerful naturally aspirated V8 in its class.

GM Canada has not published horsepower, torque or towing figures for the 2027 truck. We are not going to guess at them, and neither should anyone else.

What this means if you are shopping in the second half of 2026: you are shopping two trucks. The outgoing 2026 at end-of-generation pricing, and the incoming 2027 at launch pricing. Those are different decisions and we will lay both out for you rather than steer you to whichever one is on our lot.

a. Eleven nameplates across trucks, SUVs, electric and commercial.

Trucks: Sierra 1500, Sierra HD (2500HD and 3500HD), Canyon
SUVs: Terrain, Acadia, Yukon, Yukon XL
Electric: Sierra EV, HUMMER EV Pickup, HUMMER EV SUV
Commercial: Savana Cargo, Savana Passenger

Two things people get wrong. The HUMMER EV is a GMC in Canada, both the pickup and the SUV. And GMC Canada sells no hybrid and no plug-in hybrid of any nameplate: there is no electric Terrain, Acadia or Yukon. GMC's electric lineup is exactly those three vehicles.

a. Between 455 and 769 km depending on trim and battery, and every one of those figures is GM-estimated, not NRCan-rated.

Here is the part worth knowing. For the 2025 Sierra EV Denali, GM Canada published an NRCan-tested figure of 628 km for Extended Range alongside a 740 km GM estimate for Max Range. The officially tested number came in roughly 11% below the manufacturer estimate on a comparable battery.

Real-world Manitoba winter range will be lower again than any published figure, for any electric vehicle from any brand. Cold reduces battery capacity and cabin heating draws from the same pack.

Ask us for the rating on the specific configuration you are considering, and ask what other owners in this climate are actually seeing. Those are two different numbers and you should have both.

The Sierra EV runs an 800-volt architecture and can add roughly 193 km in about 10 minutes on a 350 kW or higher DC fast charger.

a. Size, power and seats.

Terrain: 1.5L turbo, 175 hp, 203 lb-ft, eight-speed automatic on all-wheel drive. Seats five. Fuel economy 9.2/8.3 L/100 km city/highway. All-wheel drive is standard on AT4 and Denali, available on Elevation.

Acadia: 2.5L turbo, 328 hp, 326 lb-ft, eight-speed automatic, all-wheel drive standard on every trim. Three rows seating up to eight. Tows up to 2,268 kg (5,000 lb) with the trailering package.

Both were recently redesigned. The Terrain's new generation launched for 2025 in Elevation trim, and 2026 is the first model year the full Elevation, AT4 and Denali ladder is available. The Acadia adds a first-ever Denali Ultimate for 2026 with standard Super Cruise.

a. Length and cargo. Same vehicle otherwise.

The XL is 383 mm longer and gives you 453 L more space behind the third row, which is the number that matters if you are carrying seven people and their luggage at the same time.

Seating is up to eight on Elevation, AT4 and Denali. AT4 Ultimate and Denali Ultimate seat seven, because second-row executive captain's chairs replace the bench.

Engines: 5.3L V8 standard, 6.2L V8 standard on Denali and AT4 Ultimate, 3.0L Duramax turbo-diesel available, all with the ten-speed automatic.

a. Yes. The Savana is still sold new in Canada as a 2026 model, in Cargo, Passenger and Cutaway configurations. It is one of very few full-size body-on-frame vans still available new in this country.

4.3L V6 standard, 276 hp and 298 lb-ft. 6.6L V8 available, 401 hp and 464 lb-ft.

Maximum trailering 4,536 kg (10,000 lb), maximum GCWR 7,258 kg (16,000 lb). Maximum cargo volume 8,031 L (283.6 cu ft). Passenger version seats up to 15.

Payload by configuration: 2500 regular wheelbase 1,480 kg (3,280 lb), 2500 extended 1,388 kg (3,060 lb), 3500 regular 1,941 kg (4,280 lb), 3500 extended 1,855 kg (4,090 lb). GVWR 3,901 kg on the 2500 and 4,491 kg on the 3500.