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L96

LY6 Vortec 6.0L V8 "GEN IV"

Vehicle Applications

  • 2007-2009 Chevrolet Silverado 2500HD, 3500HD
  • 2007-2009 GMC Sierra 2500HD, 3500HD
  • 2007-2009 Chevrolet Suburban 3/4 ton
  • 2007-2009  GMC Yukon XL 3/4 ton
  • 2008-2009 Chevrolet Express 2500HD, 3500HD
  • 2008-2009 GMC Savana 2500HD, 3500HD

Product Highlights

  • Variable Valve Timing (VVT) 
  • Gen IV Cast Iron Cylinder Block
  • Returnless Fuel Injection with Stainless Steel Fuel Rail
  • Advanced Electronic Throttle Control
  • 58X Ignition System



LY6 Engine Specs (VIN "K")

The information listed here is for a stock engine.

Performance Specifications
Compression Ratio 9.6 : 1
Horsepower Rating 367 hp.
Torque Rating 375 ft./lb

 

Application Information

VIN 8th Digit

Year

Make

Model

K

2007-09

Chevrolet

Silverado 2500 HD, 3500 HD

GMC

Sierra 2500 HD, 3500 HD

2007-09

Chevrolet

Suburban 2500

GMC

Yukon XL 2500

2008-09

Chevrolet

Express 2500, 3500

GMC

Savana 2500, 3500

 

Engine Block Specifications
Casting

Numbers

12576181
Material

Iron
Displacement

6.0L / 364 c.i.d.
Bore

Dia.

4.000 in.
Stroke

3.622 in.
Deck

Height

9.240 in.
Bore

Spacing

4.400 in.
Thrust

Bearing

Location

#3 Main
Main

Cap Style

6-Bolt
Main

Housing Bore Dia.

2.751 in.
Cam

Housing Bore Dia.

Bore 1/5 = 2.346 in. Bore 2/4 = 2.326 in. Bore 3 = 2.307 in.
Cam-to-Crank

Centerline

4.914 in.

 

Rotating Assembly Specifications
Piston

Material

Hypereutectic Cast Aluminum Alloy
Piston

Style

Dished with valve reliefs
Piston

Volume

+6.7cc
Wrist Pin

Dia.

0.9431 in. (Full Floating)
Connecting

Rod Material

Powdered Metal
Connecting

Rod Style

I-beam
Connecting

Rod Length

6.098 in.
Connecting

Rod

Housing Bore

2.225 in.
Connecting

Rod Bolts

M9 x 1 x 43
Connecting

Rod Part Number

12607475
Crankshaft

Material

Cast Iron
Crankshaft

Casting Number (last three digits)

216
Crankshaft

Main Journal Dia.

2.559 in.
Crankshaft

Rod Journal Dia.

2.100 in.
Reluctor

Wheel

58X

 

Cylinder Head Specifications
Casting

Numbers

5364, 823
Material

Aluminum
Combustion

Chamber

Volume

70cc
Intake

Port Shape

Rectangle
Intake

Runner Volume

257cc
Exhaust

Port Shape

D-Port
Exhaust

Runner Volume

87cc
Intake

Valve Dia.

2.165 in.
Exhaust

Valve Dia.

1.590 in.
Cylinder

Head Bolt Style

Torque to Yield (TTY)
Cylinder

Head Bolt

Size

(10) M11 x 2 x 100, (5) M8 x 1.25 x 45

 

Camshaft Specifications
Duration

@ .050 in.

(int./exh.)

196°/208°
Valve

Lift (int./exh.)

0.467 in./.479 in.
Lobe

Separation

116°
Cam

Gear Attachment

1-Bolt
Cam Gear

Poles

4X
Active

Fuel

Management (AFM)

No
Variable

Valve Timing

(VVT)

Yes

 

Valvetrain Specifications
Lifter

Style

Hydraulic Roller
Lifter

Link Style

Plastic Lifter Tray
Lifter

Body Diameter

0.842 in.
Pushrod

Length

7.385 in.
Rocker

Arm Mounting

Style

Pedestal
Rocker

Arm Style

Die-Cast, Roller Fulcrum
Rocker

Ratio

1.7
Rocker

Offset

Intake Rocker
Valve

Spring Style

Beehive
Valve

Spring Color

Natural
Valve

Angle

15 degrees
Intake

Valve Material

Steel, Solid Stem
Intake

Valve Dia.

2.165 in.
Exhaust

Valve Material

Steel, Solid Stem
Exhaust

Valve Dia.

1.590 in.

 

Other

Specifications
  2007-08 2009-10
Intake

Manifold		 Truck-Style
Throttle

Body		 87mm,

4-bolt
Throttle

Control		 Electronic

(Drive-by-Wire)
Fuel

Injector P/N		 12580681 12587269
Fuel

Injector Flow		 30 lbs./hr. 40 lbs./hr.
Flex

Fuel Capable		 No
Fuel

Injector Length

(between O-rings)		 1.900 in.
Fuel

Injector

Connector		 EV6-USCAR
PCM E38
Crankshaft

Reluctor

Ring		 58X
Camshaft

Sensor		 Front

mount,

4X on cam
Oil

Pan		 Deep

Rear Sump
Oil

Pump		 Standard

Flow

(0.96 c.i. per rev.)


LY6 Harnesses