2025 GMC SIERRA 3500HD DENALI ULTIMATE CREW CAB 4X4 | 6.6L DURAMAX DIESEL | 10-SPEED ALLISON | DENALI ULTIMATE | 4" LIFT | FOX 2.0 SHOCKS | 37" TIRES
Powertrain & Performance

Engine: 6.6L Duramax Turbo-Diesel V8
Transmission: Allison 10-Speed Automatic
Drivetrain: 4x4
Rear Differential: Locking / Limited-Slip Differential
Trailering: Gooseneck / 5th Wheel Prep Package
Capability Highlights: Heavy-duty towing capability, integrated trailer tech, and serious off-road presence

This 2025 GMC Sierra 3500HD Denali Ultimate is the kind of truck that checks every box — luxury, power, presence, and premium upgrades. Finished in Downpour Metallic over the rich Alpine Umber interior, this is already one of the most desirable heavy-duty trucks on the market… but this one goes a step further with a properly built stance and upgraded suspension.

Custom Upgrades & Stance

This Sierra has been tastefully upgraded to give it an even more aggressive look and commanding road presence.

Custom upgrades include:

4-inch lift
Contigo upper control arms
FOX 2.0 shocks
37-inch tires

The result is a Denali Ultimate that sits exactly how a truck like this should — bold, clean, and seriously dialed in.

Denali Ultimate Interior Features
Alpine Umber full leather interior
Heated & ventilated front seats
Heated rear seats
Massaging front seats
Power-adjustable front seats with memory
Driver & passenger lumbar adjustment
Heads-Up Display (HUD)
Power sunroof / moonroof
Heated steering wheel
Dual-zone / multi-zone climate control
Rear defrost
Premium floor mats
Power windows & door locks
Keyless entry with push-button start
Remote start
Technology & Infotainment
Bose Premium Series audio system
12-speaker system with CenterPoint
Richbass woofer
AudioPilot
Backup camera
Aerial View / surround-style camera display
Head-Up Display
Auto-dimming rearview mirror
Universal garage door opener
WiFi hotspot capability
Telematics / connected services capability
In-vehicle trailering app
Steering wheel audio controls
Trailering, Capability & Package Highlights
Denali Ultimate Preferred Equipment Group (5SB)
Technology Package
Trailering Package
X31 Off-Road Package
Gooseneck / 5th Wheel Prep Package
ProGrade Trailering System
Hitch Guidance with Hitch View
Tow hitch
Heavy-duty air filtration monitoring
220-amp alternator
Heavy-duty battery
High Idle Switch
Bed liner
Power retractable running boards
Exterior Features
Downpour Metallic exterior
LED headlights
LED daytime running lights
Fog lamps
Power folding heated tow mirrors
Integrated turn signal mirrors
Privacy glass
Tow hooks
Power retractable running boards
Factory Denali Ultimate premium exterior styling
Lifted stance with upgraded suspension and oversized tire setup
Safety & Driver Assistance
Adaptive Cruise Control
Front Collision Warning
Front Collision Mitigation
Lane Departure Warning
Cross-Traffic Alert
Rear Park Assist
Automatic High Beams
Tire Pressure Monitoring System
Stability Control
Traction Control
Multiple airbags throughout
Advanced trailering and driver-assist integration
Why This Sierra 3500HD Denali Ultimate Stands Out

If you've been waiting for a next-level heavy-duty diesel that delivers both first-class luxury and serious visual presence, this is it.

A 2025 Sierra 3500HD Denali Ultimate is already top-tier from the factory — but with the 4-inch lift, Contigo upper control arms, FOX 2.0 shocks, and 37s, this one separates itself from the standard crowd in all the right ways. It has the look, the spec, the capability, and the kind of stance that makes it impossible to ignore.

Luxury-loaded, properly upgraded, and built to stand tall — this Denali Ultimate is the full package.