GMC Sierra 3500HD trim comparison
2024 GMC Sierra 3500HD SLT vs Denali Ultimate
The Sierra 3500HD SLT starts at $63,300 while the Denali Ultimate is $95,300. That $32,000 gap buys 6 meaningful differences.
This is a powertrain and drivetrain change. The Denali Ultimate gets the 6.6L V8 diesel Turbo and 4WD, so the $32,000 is buying a different driving experience, not just nicer trim.
This is a real hardware fork, not just a trim-label shuffle. The SLT is enough if the 6.6L V8 with RWD already fits your routine; the Denali Ultimate only earns the jump when the 6.6L V8 diesel Turbo and 4WD setup is the point of the upgrade.
If you are budgeting this move monthly, the jump from the SLT to the Denali Ultimate is about $563/month on a 60-month loan at 6.5% APR with 10% down. That works out to roughly $33,780 more by the time interest is counted. If that different powertrain is not part of your real use case, the cheaper trim keeps more money in your pocket without changing the core experience you need.
Lock one trim, change the other side, and move through exact pair pages without resetting back to the full lineup every time.
Who notices the difference
The higher trim starts to make more sense when you tow, haul, or merge with enough load that the stronger powertrain matters.
When both feel the same
The SLT and Denali Ultimate are mechanically identical where it counts: the same 10-speed shiftable automatic transmission.
The upgrade math
You are paying $32,000 for 5 measurable differences, which works out to about $6,400 per change.
Key Differences at a Glance
This is the fast read: price, power, efficiency, and the feature flips most likely to change the answer.
Every Difference, Side by Side
This is the full read behind the quick decision signals above: the complete hardware, comfort, and equipment story. 6 specification differences, 0 shared.
Full Specification Comparison
Specifications reflect available data as of early 2024. Confirm details with an authorized dealer before purchasing.
| Spec | SLT | Denali Ultimate |
|---|---|---|
| Pricing | ||
| MSRP | $63,300 | $95,300 |
| Powertrain | ||
| Engine | 6.6L V8 | 6.6L V8 diesel Turbo |
| Horsepower | 401 hp | 470 hp |
| Torque | 464 lb-ft | 975 lb-ft |
| Transmission | 10-speed shiftable automatic | 10-speed shiftable automatic |
| Drivetrain | RWD | 4WD |
| Fuel Economy | ||
| Fuel Tank | 36.0 gal | 36.0 gal |
| Dimensions | ||
| Curb Weight | 7,227 lbs | 8,333 lbs |
| Wheelbase | 172.0" | 159.0" |
| Length | 266.8" | 250.8" |
| Width | 96.6" | 81.9" |
| Height | 80.0" | 81.2" |
| Truck Specs | ||
| Cab Type | Crew Cab | Crew Cab |
| Warranty | ||
| Bumper-to-Bumper | 3yr/36k | 3yr/36k |
| Powertrain | 5yr/60k | 5yr/60k |
| Corrosion | 6yr/100k | 6yr/100k |
| Roadside Assistance | 5yr/60k | 5yr/60k |
Data sources: licensed third-party automotive data, EPA fueleconomy.gov, NHTSA, and official manufacturer materials. Values marked est. are estimated.
2024 GMC Sierra 3500HD SLT vs Denali Ultimate Questions Shoppers Ask
Use this page for the direct trim answer, then zoom back out to the GMC Sierra 3500HD lineup, the GMC brand hub, the Full-Size Trucks, the how to pick a trim guide, or our mid-trim value research when you need the bigger shopping path behind this one matchup.
How much more does the 2024 Sierra 3500HD Denali Ultimate cost than the SLT?
The Denali Ultimate starts at $95,300 compared to $63,300 for the SLT (both Crew Cab RWD). That is a $32,000 difference, or approximately $563/month more on a 60-month loan.
Do the 2024 GMC Sierra 3500HD SLT and Denali Ultimate have the same engine?
No. The SLT uses a 6.6L V8 (401 hp, 464 lb-ft), while the Denali Ultimate has the 6.6L V8 diesel Turbo (470 hp, 975 lb-ft). That is 69 more horsepower. Both pair with the same 10-speed shiftable automatic.
Does the 2024 Sierra 3500HD SLT come with 4WD?
No. The SLT comes standard with RWD while the Denali Ultimate has 4WD. This affects traction, fuel economy, and curb weight.
What warranty does the 2024 GMC Sierra 3500HD come with?
All 2024 GMC Sierra 3500HD trims, including both the SLT and Denali Ultimate, come with GMC's standard warranty: 3yr/36k bumper-to-bumper and 5yr/60k powertrain coverage. Warranty does not vary by trim level.
Is the 2024 GMC Sierra 3500HD Denali Ultimate worth $32,000 more than the SLT?
The Denali Ultimate changes both the engine and drivetrain for $32,000 more. That is a hardware upgrade, not just a feature bump.
The Full Story Behind This Price Gap
Use the direct answer above for this exact matchup, then use these guides to understand whether you are really looking at a feature step-up, a package shuffle, or the point where the lineup starts changing in a meaningful way.
What $32,000 Gets You
At $32,000 more, the Sierra 3500HD Denali Ultimate adds the 6.6L V8 diesel Turbo engine (+69 hp) and 4WD. This is a situational call. If those features are on your must-have list, the upgrade makes sense. If not, the SLT delivers the same core Sierra 3500HD experience for less.
SLT vs. Denali Ultimate: Day-to-Day
The Denali Ultimate runs a 6.6L V8 diesel Turbo instead of the SLT's 6.6L V8. That means 69 more horsepower and 511 more lb-ft of torque. You will feel the difference towing, merging, and passing on the highway. Stepping up to the Denali Ultimate gets you 4WD. For truck buyers in northern climates or those who tow regularly, this is a functional upgrade worth considering.
Summary
The Sierra 3500HD Denali Ultimate costs $32,000 more than the SLT (about $563/month more on a 60-month loan). That buys 5 meaningful changes at $6,400 per change. Whether that trade-off is worth it depends on which features matter to your daily driving.
Trim-Matched Accessories
These add-ons are split by trim intent so the recommendations follow the actual use case, not just the same repeated product block.
GMC Sierra 3500HD SLT
Value-trim add-onsThese picks fit the SLT best when the goal is covering the daily-use gaps without paying up to the next trim.
GMC Sierra 3500HD Denali Ultimate
Step-up trim add-onsThese picks suit the Denali Ultimate when you want the accessories to match the nicer cabin, broader utility, or more premium use case.
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Specifications shown combine licensed third-party automotive data with official manufacturer, EPA, and NHTSA source material for the 2024 model year. Actual pricing, features, and availability may vary by region and dealer. Always confirm details with an authorized dealer before making a purchase decision. TrimAtlas is not affiliated with GMC or any dealership.
Page updated 2026-03-18. Verify equipment, pricing, and regional availability with the manufacturer or dealer.