The 2024 GMC Sierra 2500HD Denali Ultimate puts a more elaborate luxury cabin into GMC’s heavy-duty pickup range. Its appeal is not simply a higher badge: the seat functions, materials and convenience equipment are the items to compare with an ordinary Denali.
Watch our 2024 GMC Sierra 2500HD Denali Ultimate video below.
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What Denali Ultimate adds
GMC’s Canadian 2024 announcement describes Alpine Umber leather and Paldao wood, 16-way power front seats with massage, 12-speaker Bose audio, a rear camera mirror, head-up display and sunroof. Power assist steps and a MultiPro tailgate with Kicker audio are also identified. Canadian Denali Ultimate announcement.
Diesel powertrain
A Canadian 2024 Denali Ultimate listing documents the 6.6-litre Duramax diesel configuration. Canadian Denali Ultimate equipment example. The 6.6-litre diesel produces 470 hp and 975 lb-ft through an Allison ten-speed automatic. GM Canada fleet specification.
Keep this HD powertrain separate from Sierra 1500 Denali Ultimate specifications. The lighter-duty truck’s engines are not substitutes for the 2500HD specification. Use the individual truck’s loading label.
Technology to verify
GMC’s 2024 HD update includes an available 13.4-inch infotainment screen and enhanced trailering-camera functions. Canadian HD technology update. Do not assume every advertised camera view works without the relevant hardware or compatible trailer.
Have the retailer demonstrate the systems you expect to use. Check service subscriptions separately from installed displays, and test the tailgate and steps in a suitable clear area. If the truck has been modified, obtain documentation of the changes.
Towing and payload
Use the exact 2500HD configuration and individual loading label when selecting a trailer. A Sierra 3500HD maximum is not a 2500HD rating, and a fifth-wheel or gooseneck figure is not automatically the conventional-trailer limit.
GMC’s Canadian announcement qualifies its capability figures by cab, drivetrain, equipment and hitch type. Manufacturer trailering qualifications. Count occupants, accessories, luggage and hitch or pin weight together. Ask for the matching documentation before making a trailer purchase.
Fuel and ownership planning
No light-duty Sierra L/100 km rating is assigned to this HD truck. The NRCan guide explains that certain heavy pickups fall outside mandatory fuel-consumption reporting. Canadian testing coverage. Light-duty figures are not a substitute for an HD fuel budget.
Canadian trim comparison and pricing
Current Canadian manufacturer pricing for these exact 2024 configurations has not been verified as of October 31, 2026. Vehicle prices, fee amounts and price differences are omitted; the table compares equipment only.
| 2024 2500HD trim | Main reason to compare |
|---|---|
| AT4 | X31 off-road suspension, twin-tube Rancho shocks, hill-descent control and skid plates. |
| Denali | Forge perforated leather front bucket seats and 13.4-inch infotainment. |
| Denali Ultimate | Full-grain leather, Paldao wood, 16-way massaging front seats, head-up display and Rear Camera Mirror; diesel catalogue configuration. |
Equipment references: Canadian model equipment · Canadian AT4 equipment listing · Canadian Denali equipment listing.
The AT4 equipment comparison uses a gasoline Crew Cab standard-box 4WD reference; Denali Ultimate uses a diesel reference configuration. Match engines and options before comparing vehicles. No current manufacturer price or complete tax-and-fee total is verified for these exact 2024 configurations.
Who should consider it?
Denali Ultimate is most relevant when you want the HD diesel configuration and will use its added seating, materials and convenience features. Compare an appropriately optioned Denali first; a base-price difference is not enough to establish the actual cost of the features you want.
Frequently asked questions
Can I use Sierra 1500 specifications?
No. The 2500HD is a different truck range.
Does the chart quote a current manufacturer price?
No. The chart compares equipment only. Current Canadian manufacturer pricing for the exact 2024 configuration has not been verified as of October 31, 2026.