Vehicle Applications

• 2007–2009 Chevrolet Suburban 1500
• 2007–2009 GMC Yukon XL
• 2007–2009 Chevrolet Avalanche
• 2007–2009 Chevrolet Silverado
• 2007–2009 GMC Sierra

Product Highlights

• Gen IV Aluminum Cylinder Block
• Rectangular Port Aluminum Cylinder Heads
• Variable Valve TIming (VVT) 
• Active Fuel Management (AFM) / Displacement on Demand (DOD)
• Advanced Electronic Throttle Control
• 58X Ignition System

L76 Truck Engine Specs (VIN "Y")

Performance Specifications
Compression Ratio	9.7 : 1
Horsepower Rating	367 hp.
Torque Rating	375 ft./lbs.

 

Application Information
VIN 8th Digit	Year	Make	Model
Y	2007-09	Chevrolet	Suburban 1500
		GMC	Yukon XL
		Chevrolet	Avalanche
			Silverado
		GMC	Sierra

 

Engine Block Specifications
Casting Number	12568952
Material	Aluminum
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 P/N	12649190
Crankshaft Material	Cast Iron
Crankshaft P/N	12588613
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
Camshaft P/N	12625439
Duration @ .050 in. (int./exh.)	196°/208°
Valve Lift (int./exh.)	0.466 in./0.478 in.
Lobe Separation	116°
Cam Gear Attachment	1-Bolt
Cam Gear Poles	4X
Active Fuel Management (AFM)	Yes
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	Offset Intake
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
Intake Manifold	Truck-Style
Throttle Body	87mm, 4-bolt
Throttle Control	Electronic (Drive-by-Wire)
Fuel Injector P/N	12580681
Fuel Injector Flow	30 lb/hr @ 58 psi
Flex Fuel Capable	No
Fuel Injector Length (between O-rings)	1.900 in.
Fuel Injector Connector	EV6 / USCAR
Computer	E38
Crankshaft Reluctor Ring	58X
Camshaft Sensor	Front timing cover, 4X
Oil Pan	Varies by Model
Oil Pump	High Volume (1.25 c.i./rev. @ 33 psi)