2025 GMC Sierra 1500 Denali vs 2026 Jeep Gladiator Mojave
70 more hp and 123 more lb-ft torque vs $16,700 less and 2 MPG better. That is the real fork. Key numbers: 355 vs 285 hp, 17 vs 19 MPG.
The Sierra 1500 Denali leads on 70 more hp, 123 more lb-ft torque. The Gladiator Mojave leads on $16,700 less, 2 MPG better. The spec table compares 6 specifications head to head.
Key Differences at a Glance
What's Actually Different
These two vehicles differ in 6 specifications.
Full Specification Comparison
Specifications and pricing reflect available data as of early 2026 and may not match current manufacturer figures. Always confirm details with an authorized dealer before making a purchase decision.
| Spec | 2025 GMC Sierra 1500 Denali | 2026 Jeep Gladiator Mojave |
|---|---|---|
| Pricing | ||
| MSRP | $68,700 | $52,000 |
| Powertrain | ||
| Engine | 5.3L V8 | 3.6L V6 |
| Horsepower | 355 hp | 285 hp |
| Torque | 383 lb-ft | 260 lb-ft |
| Transmission | 10-speed shiftable automatic | 8-speed shiftable automatic |
| Drivetrain | 4WD | 4WD |
| Fuel Economy | ||
| City MPG | 15 | 17 |
| Highway MPG | 19 | 22 |
| Combined MPG | 17 | 19 |
| Fuel Tank | 24.0 gal | 22.0 gal |
| Annual Fuel Cost (EPA) | No published data | $2,300/yr |
| Dimensions | ||
| Curb Weight | 5,110 lbs | 5,004 lbs |
| Wheelbase | 147.0" | 137.3" |
| Length | 231.9" | 218.0" |
| Width | 81.2" | 73.8" |
| Height | 75.5" | 76.1" |
| Truck Specs | ||
| Cab Type | Crew Cab | Crew Cab |
| Bed Length | 5.8 ft | No published data |
| Safety | ||
| NHTSA Overall | 5/5 stars | No published data |
| Warranty | ||
| Bumper-to-Bumper | 3yr/36k | 3yr/36k |
| Powertrain | 5yr/60k | 5yr/60k |
| Corrosion | 6yr/100k | 5yr/100k |
| Roadside Assistance | 5yr/60k | 5yr/60k |
Frequently Asked Questions
What is the price difference between the 2025 GMC Sierra 1500 Denali and 2026 Jeep Gladiator Mojave?
The 2026 Jeep Gladiator Mojave starts at $52,000, $16,700 less than the 2025 GMC Sierra 1500 Denali at $68,700. On a 60-month loan that is roughly $294/month. All prices are MSRP before destination and dealer fees.
Who should choose the 2025 GMC Sierra 1500 Denali?
The 2025 GMC Sierra 1500 Denali is the stronger pick when you need the extra 70 hp for towing, hauling, or highway merging; you want the larger footprint for passengers or cargo; 123 lb-ft more torque for pulling trailers and heavy loads.
Who should choose the 2026 Jeep Gladiator Mojave?
The 2026 Jeep Gladiator Mojave is the stronger pick when you want to keep $16,700 in your pocket and the 2026 Jeep Gladiator Mojave covers your needs; lower running costs matter to you, roughly $260/year less on fuel; you prefer a smaller vehicle that is easier to park and maneuver.
Which gets better fuel economy, the 2025 GMC Sierra 1500 Denali or 2026 Jeep Gladiator Mojave?
The 2026 Jeep Gladiator Mojave rates 19 combined MPG, 2 MPG ahead.
Which is more powerful, the 2025 GMC Sierra 1500 Denali or 2026 Jeep Gladiator Mojave?
The 2025 GMC Sierra 1500 Denali produces 355 hp, 70 more than the 2026 Jeep Gladiator Mojave at 285 hp. The 2025 GMC Sierra 1500 Denali also leads in torque at 383 lb-ft vs 260 lb-ft. That torque gap matters most when towing or hauling heavy loads. The 2025 GMC Sierra 1500 Denali runs a 5.3L V8; the 2026 Jeep Gladiator Mojave uses a 3.6L V6.
Is the 2025 GMC Sierra 1500 Denali bigger than the 2026 Jeep Gladiator Mojave?
The 2025 GMC Sierra 1500 Denali is 13.9″ longer at 231.9″ vs 218.0″. The 2025 GMC Sierra 1500 Denali has a 9.7″ longer wheelbase, which typically means more rear-seat legroom.
How do the warranties compare?
Both offer similar warranty coverage: 3yr/36k bumper-to-bumper and 5yr/60k powertrain.
Explore more: GMC trims, GMC Sierra 1500 trims, Jeep trims, Jeep Gladiator trims
Sierra 1500 vs Gladiator: What This Matchup Is Really About
The 2025 GMC Sierra 1500 Denali and 2026 Jeep Gladiator Mojave compete directly in the full-size truck segment, where towing capacity, payload, and cab comfort separate the contenders. The $-16,700 gap adds up to $294/month on a 60-month loan. That is real money, so the pricier option needs to earn it with capabilities you will actually use.
Under the Hood
The 2025 GMC Sierra 1500 Denali runs a 5.3L V8; the 2026 Jeep Gladiator Mojave uses a 3.6L V6. The 2025 GMC Sierra 1500 Denali has 70 more hp (355 vs 285). A gap that large affects towing confidence, highway merging, and how loaded the vehicle can feel before it struggles. The 2025 GMC Sierra 1500 Denali also delivers 123 more lb-ft of torque (383 vs 260), which matters for trailer stability and pulling heavy loads up grades. Both use 4WD.
Running Costs: Sierra 1500 vs Gladiator
The 2026 Jeep Gladiator Mojave saves roughly $260/year on fuel at $3.50/gallon and 12,000 annual miles. Over five years, that is $1,300.
How Each One Fits Your Daily Life
The 2025 GMC Sierra 1500 Denali is 13.9″ longer, which translates to more room inside but a larger footprint in parking lots and garages. The 2025 GMC Sierra 1500 Denali has a 9.7″ longer wheelbase, typically meaning a smoother ride and more rear-seat legroom.
Bottom Line
Choose the 2025 GMC Sierra 1500 Denali when you need the extra 70 hp for towing, hauling, or highway merging. Choose the 2026 Jeep Gladiator Mojave when you want to keep $16,700 in your pocket and the 2026 Jeep Gladiator Mojave covers your needs.
Specifications shown combine licensed third-party automotive data with official manufacturer, EPA, and NHTSA source material. 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 Jeep or any dealership.