New 2025 GMC Sierra 3500HD Denali Ultimate

Mechanical & Powertrain

Engine, Duramax 6.6L Turbo-Diesel V8, B20-Diesel compatible (470 hp [350.5 kW] @ 2800 rpm, 975 lb-ft of torque [1322 Nm] @ 1600 rpm)

Rear axle, 3.42 ratio

Pickup bed

Engine block heater

Air filter, heavy-duty

Air filtration monitoring

Transfer case, two-speed active electronic Autotrac with push button control

Auto-locking rear differential

Four wheel drive

Cooling, external engine oil cooler

Cooling, auxiliary external transmission oil cooler

Battery, heavy-duty 730 cold-cranking amps/70 Amp-hr maintenance-free with rundown protection and retained accessory power (Included and only available with (L5P) Duramax 6.6L Turbo-Diesel V8 engine.)

Alternator, 220 amps

Trailer brake controller, integrated

Recovery hooks, front, Chrome (Plant installed.)

Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section

Skid Plates protect the oil pan, front axle and transfer case

Suspension, Off-Road includes twin-tube shocks (Not available with dual rear wheels.)

Steering, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue

Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors

Exhaust Brake

Brake lining wear indicator

Capped Fuel Fill

Safety

StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist

Hill Descent Control (Not available with dual rear wheels.)

Airbags, Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)

Front and Rear Park Assist, ultrasonic

Bed View Camera camera in the CHMSL to show a view of the cargo bed, display located in infotainment screen, includes Two Trailer Camera Provisions

Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching

Trailer Camera Provisions and trailer viewing software

Rear Cross Traffic Alert

Trailer Side Blind Zone Alert

Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)

Safety Alert Seat

Rear Seat Reminder

Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver

Seat Belt Adjustable Guide Loops, front row only

Indicator-Seat Belt WARNING, Rear Seat (Requires Crew Cab or Double Cab model.)

Buckle to Drive prevents vehicle from being shifted out of Park until driver seat belt is fastened; times out after 20 seconds and encourages seat belt use (Included and only available with (PDI) Sierra HD Pro Safety)

Interior

Seat, Up-level Rear with Storage Package, 60/40 folding bench for Crew Cab models includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width underseat storage, (includes child seat top tether anchor)

Seats, heated second row outboard seats

Driver memory, recalls driver "presets" for power driver seat and outside mirrors

Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability

Floor covering, color-keyed carpeting

Steering wheel, leather-wrapped

Steering wheel, heated

Steering column, manual Tilt-Wheel and telescoping

Steering wheel audio controls

Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display

GMC Premium information Display- 13.4" diagonal Multicolor touch screen

Exterior Temperature Display located in radio display

Compass, located in instrument cluster

Window, power front, drivers express up/down

Remote vehicle starter system

Adaptive Cruise Control

Universal Home Remote

Theft-deterrent system, unauthorized entry

Wireless Charging

Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)

USB ports, (2) charge-only, rear

Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)

Air conditioning, dual-zone automatic climate control

Air vents, rear

Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mounted

Exterior

Single Rear Wheels

Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door

Sunroof, power

Bumper, front, body-color lower

Bumper, rear body-color with bumper CornerSteps

CornerStep, rear bumper

Bed Step, Black integrated on forward portion of bed on driver and passenger side

Assist steps, power-retractable with LED perimeter lighting and bright accent (Not available with any other assist steps.)

Moldings, beltline, stainless steel

Wheelhouse liners, rear (Not available with dual rear wheel models.)

Bed Liner, Spray-on Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (Available with Ship Thru code (SQE) or (TCH), not available with any other Ship Thru code.)

Cargo tie downs (12), fixed, rated at 500 lbs per corner

Grille, Signature Denali Ultimate grille in Vader chrome with High Gloss Black surround

Winter Grille Cover

Fog lamps, LED

Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps

Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel

LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob

Lamps, Smoked Amber roof marker, (LED) (Standard with dual rear wheels. Not available with (YF5) California state emissions requirements on single rear wheels.)

Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm])

Mirror caps, chrome

Wipers, front rain-sensing

Glass, deep-tinted

Door handles, chrome

Tailgate, GMC MultiPro Tailgate with six functional load/access features. NOTE: Auto release can be disabled if ball hitch is installed. See Owner's manual for details

Tailgate and bed rail protection caps, top

Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light