⌘K
Find a vehicle
RecallsCompareNewsPricing
Your vehicle
VIN decoderWindow stickerProblems by systemTitle brands
Federal filings
Service bulletinsOwner complaintsInvestigationsEarly Warning reportsWarranty extensionsDriver-assist crashesTrouble codes
Browse the record
GuidesRankingsAll makesQuarterly reportsWhat is in the data
Paperwork
Repair Claim KitCar CheckFor attorneysFor expert witnessesFor repair shopsRecall disclosure formRecall fix sheets
Tools and data
Recall WatchFleet VIN checkCost calculatorsCar crosswordAPI & data
Sign inGarage
Your vehicleHome›GMC›Sierra 2500HD›2025› SLT
2025 GMC Sierra 2500HD

SLT 2WD

Gas 2WD MSRP —Compare this trim against anything →

What the SLT adds over the Pro

SpecProSLT
Steering typeHydraulic power-assisted recirculating ballHydraulic power-assisted recirculating ball with Digital Variable Steering Assist
Tire sizeLT245/75R17E ALSLT275/70R18E AT
Wheel diameter17 in18 in
Wheel materialsteelaluminum

Standard here, not on the base trim: Digital Variable Steering Assist, Front and Rear Park Assist (now available on Pro and SLE trims)

Specifications

Source: manufacturer press kit

Brakes

Front brake diameter355 mm
Front brake typeventilated disc
Rear brake diameter360 mm
Rear brake typesolid disc

Dimensions Exterior

Ground clearance10.2 in
Overall height79.9 in
Overall length236.6 in
Overall width81.8 in
Wheelbase141.6 in

Engine Basics

Aspirationnaturally aspirated
Cylinder count8
Engine displacement6600 cc
Fuel injection systemgdi mpi
Engine type (full description)6.6L V-8 gasoline or E85 FlexFuel
Valve configurationOverhead-valve, two valves per cylinder, variable valve timing

Engine Output

Horsepower401 hp
Torque464 lb-ft

Fuel System

Fuel tank capacity36 gal

Headroom

Front headroom43.1 in
Second-row headroom39.9 in

Legroom

Front legroom44.5 in
Second-row legroom35.2 in

Shoulder Room

Front shoulder room66.1 in
Second-row shoulder room64.9 in

Steering

Steering typeHydraulic power-assisted recirculating ball with Digital Variable Steering Assist

Suspension

Front suspension typeShort long arms independent front suspension with torsion bars
Rear suspension typeSemi-elliptic, two-stage, multi-leaf springs

Tires

Tire sizeLT275/70R18E AT

Transmission

Final drive ratio3.7
Transmission speeds10
Transmission typeautomatic

Weights

Curb weight (maximum)7428 lbs
Curb weight (minimum)6203 lbs
Gross vehicle weight rating11000 lbs
Payload capacity3759 lbs

Wheels

Wheel diameter18 in
Wheel materialaluminum

Standard & optional equipment

Source: manufacturer press kit

Safety3 std · 1 opt

  • ABS and Stabilitrak electronic stability assist
  • Front and Rear Park Assist (now available on Pro and SLE trims)
  • Hydraulic power-assisted Hydroboost brake booster, four-wheel disc brakes
  • Adaptive Cruise Control with Trailering (standard on AT4 and Denali) optional

Powertrain2 std · 1 opt

  • 6.6L V-8 gasoline or E85 FlexFuel engine (401 hp / 464 lb-ft)
  • Allison 10L1000 10-speed automatic transmission
  • Duramax 6.6L V-8 Turbo-Diesel engine (470 hp / 975 lb-ft) optional

Chassis2 std · 0 opt

  • Digital Variable Steering Assist
  • Short long arms independent front suspension with torsion bars

Cargo1 std · 1 opt

  • Trailer Brake Controller (standard across all trims)
  • Max Towing Package (NHT) – increases diesel conventional tow rating to 20,000 lb on qualifying configurations optional

Ranked by what shoppers ask about first; standard equipment before options.

Transcribed from the manufacturer's official press kit for the 2025 Sierra 2500HD. Confirm with the window sticker for a specific unit.

The cheapest ownership win

Insurers price the 2025 Sierra 2500HD very differently, and the gap between the best and worst quote on the same car and driver is usually larger than any option you are weighing on this page.

How to compare cover →

Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.

Common questions about the SLT

Source: EPA, NHTSA and manufacturer press kits

What does the 2025 GMC Sierra 2500HD SLT add over the Pro?

Against the Pro, 2 features become standard that the Pro does not and 4 published specifications differ. Both lists are on this page, taken from the manufacturer's own press material.