Silverado 2500HD Specifications at a Glance

• Gas V8: 6.6L, 412 horsepower and 472 lb-ft.
• Available Duramax V8: 8.3L, 555 horsepower and 1,230 lb-ft.
• Crew Cab Standard Bed: 250.04 inches overall with a 158.94-inch wheelbase.
• Long Bed cargo volume: 83.5 cubic feet.

The 2027 Silverado 2500HD offers 412-horsepower gasoline or 555-horsepower Duramax power, Standard and Long Beds, and Regular, Double and Crew Cab bodies. NWA truck sales at George Nunnally Chevrolet serve Rogers, Springdale, Siloam Springs, Centerton, Lowell and Fayetteville through Silverado 2500HD sales; six trims provide different cab and equipment choices.

Engine Specifications

Specification	6.6L gasoline V8	Available 8.3L Duramax Turbo-Diesel V8
Engine code	L8S	L6P
Displacement	6.6L	8.3L
Horsepower	412 hp	555 hp
Torque	472 lb-ft	1,230 lb-ft
Transmission	Allison 10-speed automatic	Allison 10-speed automatic
Engine-specific hardware	Digital oil-level display	Variable-geometry turbocharger, exhaust brake and dual-stage air-to-water charge cooling

Gasoline V8

The enhanced 6.6L engine supports gas-powered work and passenger-cab layouts. Its digital oil-level reading appears in the Driver Information Center. The Allison 10-speed automatic handles the engine’s 472 lb-ft output, with towing ratings dependent on the cab, drivetrain and hitch combination.

Duramax Turbo-Diesel V8

Duramax construction brings steel pistons and forged rotating components together inside a compacted graphite iron block. Dual-stage charge cooling supports its 555-horsepower output under load. The turbocharger’s exhaust-braking function works with transmission grade-braking strategies during deceleration.

Exterior Dimensions

Cab and bed	Length	Wheelbase	Body width	Height	Ground clearance
Regular Cab Long Bed 2WD	235.59 inches	141.50 inches	81.75 inches	79.94 inches	10.19 inches
Double Cab Standard Bed	240.51 inches	149.40 inches	81.85 inches	79.95 inches	10.16 inches
Double Cab Long Bed	256.54 inches	162.48 inches	81.85 inches	79.8 inches	10.12 inches
Crew Cab Standard Bed	250.04 inches	158.94 inches	81.85 inches	79.82 inches	10.12 inches
Crew Cab Long Bed	266.06 inches	172 inches	81.85 inches	79.65 inches	10.08 inches
ZR2 Crew Cab Standard Bed 4WD	250.04 inches	159.1 inches	81.85 inches	82.68 inches	11.61 inches

Widths above are body widths without outside mirrors; towing mirrors extend beyond the body. Dimensions describe the factory layouts in the 2027 order guide, and optional accessories can change the truck’s physical dimensions.

Curb Weight and GVWR

GVWR is the allowed loaded-truck weight; curb weight is the unloaded truck’s weight. The eligible Crew Cab Standard Bed 4WD Duramax with Max Trailering has a 12,150-pound GVWR. Its passenger, cargo and hitch-load limits come from the completed truck’s loading label.

Nunnally provides curb-weight and payload information for the specific truck and VIN. The truck’s driver-door-jamb loading label identifies its passenger-and-cargo limit; equipment, occupants and hitch load affect the remaining allowance.

Trim	Curb-weight basis
WT	Specific truck label; cab, bed, engine and equipment vary.
Custom	Specific Double or Crew Cab truck and engine.
LT	Specific 4WD Regular, Double or Crew Cab truck.
LTZ	Specific 4WD Crew Cab, bed and engine.
ZR2	Specific Crew Cab Standard Bed 4WD truck and engine.
High Country	Specific 4WD Crew Cab, bed and engine.

Interior Dimensions

Cab	Front headroom	Front legroom	Rear headroom	Rear legroom	Seating
Regular Cab	43.11 inches	44.53 inches	Single passenger row	Single passenger row	3
Double Cab	43.03 inches	44.53 inches	39.88 inches	35.24 inches	Up to 6; 5 with front buckets
Crew Cab	43.03 inches	44.53 inches	40.12 inches	43.40 inches	Up to 6; 5 with front buckets

Crew Cab shoulder room measures 66.02 inches in front and 65.3 inches in the second row. Front hip room is 61.18 inches and rear hip room is 60.24 inches. Bucket-seat cabins place a center console between the front occupants.

Capacity and Capability

Capacity	Standard Bed	Long Bed
Box-floor length	82.25 inches	98.27 inches
Box width	71.40 inches	71.40 inches
Box depth	21 inches	21 inches
Cargo volume	69.5 cubic feet	83.5 cubic feet

Properly equipped truck	Hitch and package	Maximum trailer rating
Crew Cab Standard Bed 4WD, 6.6L gas	Conventional ball hitch	16,000 lbs
Crew Cab Standard Bed 4WD, 8.3L Duramax	Conventional ball hitch, Max Trailering	20,000 lbs
Crew Cab Standard Bed 4WD, 8.3L Duramax	Fifth-wheel, Max Trailering	22,200 lbs
Crew Cab Standard Bed 4WD, 8.3L Duramax	Gooseneck, Max Trailering	22,400 lbs
Regular Cab Long Bed 2WD, 8.3L Duramax	Gooseneck, Max Trailering	23,200 lbs

Chevrolet’s 2027 Fleet Guide lists a maximum gas-engine payload of 4,210 pounds for Regular Cab Long Bed 2WD and 4,000 pounds for Crew Cab Long Bed 4WD. Those figures require the 6.6L V8 and eligible 18- or 20-inch wheels; the completed truck’s loading label determines its actual carrying limit. The towing reference includes the separate conventional, fifth-wheel and gooseneck combinations and factory package requirements.

Wheels, Tires and Brakes

WT has 18-inch painted-steel wheels, LT and LTZ use standard 18-inch high-gloss black aluminum wheels, and Custom has standard 20-inch machined-aluminum wheels. High Country’s standard wheels are 20-inch bright-finish aluminum. ZR2 uses 18-inch black aluminum wheels with 35-inch mud-terrain tires.

The 2027 front braking system combines 14.6-inch rotors, four-piston fixed front calipers and eBoost assistance. Electrically assisted rack-and-pinion steering updates steering assistance across the HD lineup.

Fuel Economy and Range

Heavy-duty pickups above 8,500 pounds GVWR generally fall outside EPA fuel-economy labeling requirements. Fuel consumption on this truck varies with engine, route, trailer weight and operating conditions; an EPA city/highway MPG figure is not assigned here.

Fuel-tank application	Gasoline	Duramax diesel
Crew Cab	36 gallons	36 gallons where engine is offered
Double Cab Standard Bed	36 gallons	29 gallons on 4WD diesel
Double Cab Long Bed	36 gallons	36 gallons on 4WD diesel
Regular Cab Long Bed	36 gallons	28 gallons

Key Features by Trim

Trim	Touchscreen	Heated front outboard seats	Ventilated front seats	HD Surround Vision
WT	7-inch standard	Not standard	Not standard	Not standard
Custom	7-inch standard	Not standard	Not standard	Not standard
LT	13.4-inch standard	Available	Not standard	Available
LTZ	13.4-inch standard	Standard	Available	Available
ZR2	13.4-inch standard	Standard	Standard	Standard
High Country	13.4-inch standard	Standard	Standard	Standard

Safety and Compliance

Adaptive Cruise Control, Forward Collision Alert, Automatic Emergency Braking, Front Pedestrian and Bicyclist Braking, and Following Distance Indicator appear as standard equipment across all six trims. Available Trailer Side Blind Zone Alert adds assistance beside a compatible trailer; driver-assistance features require an attentive driver and have operating limits.

Warranty Coverage

Coverage	Published Chevrolet term
Basic warranty	3 years or 36,000 miles, whichever comes first
Typical gasoline powertrain coverage	5 years or 60,000 miles; the vehicle’s warranty controls the applicable terms
Typical rust-through coverage	6 years or 100,000 miles; vehicle-specific terms apply

The service schedule includes annual oil-and-filter service at minimum and tire rotation every 7,500 miles. Engine-specific service and warranty documents govern the new Duramax’s fluids and coverage.

What These 2027 Silverado 2500HD Numbers Mean in Practice

Dimension	Truck use
Crew Cab Standard Bed length: 250.04 inches	The truck extends beyond a 240-inch-long space before room for opening the tailgate.
Crew Cab Long Bed length: 266.06 inches	The Long Bed adds cargo-floor length and requires a longer parking area.
Crew Cab turning diameter: 52.7 feet Standard Bed, 57 feet Long Bed with 20- or 22-inch wheels	The long-wheelbase body needs a wider turning area.
Body width: 81.85 inches on Double and Crew Cab	Outside mirrors add width beyond the published body measurement.
Crew Cab rear legroom: 43.40 inches	A rear passenger row is part of the Crew Cab’s space allocation.

Specifications FAQs

How long is a 2027 Double Cab Standard Bed?

The Double Cab Standard Bed measures 240.51 inches overall with a 149.40-inch wheelbase. Its published body width is 81.85 inches, excluding the mirrors. Rear legroom measures 35.24 inches, and the Standard Bed cargo floor measures 82.25 inches with 69.5 cubic feet of cargo volume.

How tall is the 2027 Silverado 2500HD ZR2?

The order guide lists ZR2 height at 82.68 inches for its Crew Cab Standard Bed 4WD body. The factory package includes a 1.5-inch lift, 35-inch mud-terrain tires and Multimatic DSSV dampers. ZR2’s overall length is 250.04 inches, with a 159.10-inch wheelbase.

What are the published Crew Cab headroom measurements?

Crew Cab headroom measures 43.03 inches in front and 40.12 inches in the rear in the 2027 dimensions table. Front legroom is 44.53 inches, with 43.40 inches of rear legroom. Seating capacity is up to six with a front bench or five with front bucket seats.

How much fuel does a diesel Regular Cab hold?

The 2027 specifications table lists 28 gallons for the Duramax Regular Cab Long Bed fuel tank. The gasoline Regular Cab tank holds 36 gallons. Crew Cab fuel capacity is 36 gallons for either offered engine, while the diesel Double Cab Standard Bed uses a 29-gallon tank.

What is the Crew Cab Long Bed turning diameter?

The order guide gives a 57-foot curb-to-curb turning diameter for Crew Cab Long Bed configurations with 20- or 22-inch wheels. The Standard Bed Crew Cab figure is 52.7 feet on that wheel basis. Long Bed Crew Cab overall length is 266.06 inches with a 172-inch wheelbase.

What engine output belongs to the 2027 gasoline Silverado 2500HD?

The 2027 2500HD gasoline V8 produces 412 horsepower and 472 lb-ft of torque from 6.6L of displacement. Its engine code is L8S, and it pairs with an Allison 10-speed automatic. The available L6P Duramax is an 8.3L turbo-diesel with 555 horsepower and 1,230 lb-ft.

What does a 12,150-pound GVWR describe?

The 12,150-pound GVWR applies to the eligible 2027 Crew Cab Standard Bed 4WD Duramax with Max Trailering. GVWR limits the loaded truck’s total weight. Passengers, cargo and trailer hitch load contribute to that loaded weight, while the completed vehicle’s labels specify its applicable loading limits.

Which 2027 Silverado 2500HD front brake components changed?

The 2027 HD update includes 14.6-inch front rotors, four-piston fixed front calipers and eBoost braking assistance. Electric rack-and-pinion power steering is another chassis update. Those systems accompany the enhanced 6.6L gas V8 and new available 8.3L Duramax, with Allison 10-speed automatic transmissions paired to both engines.

Explore the 2027 Silverado 2500HD