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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.)