Vehicle Applications

• 2007-2014 Chevrolet Avalanche
• 2007–2013 Chevrolet Silverado 1500
• 2007–2014 Chevrolet Suburban 1/2 ton
• 2007–2014 Chevrolet Tahoe
• 2007–2013 GMC Sierra 1500
• 2007–2014 GMC Yukon
• 2007–2014 GMC Yukon XL 1/2 ton

Product Highlights

• Gen IV Iron Cylinder Block
• Cathedral Port Aluminum Cylinder Heads
• Active Fuel Management (AFM) / Displacement on Demand (DOD)
• Advanced Electronic Throttle Control
• 58X Ignition System

LY5 Engine Specs (VIN "J")

Performance Specifications
Compression Ratio	9.9 : 1
Horsepower Rating	315-320 hp.
Torque Rating	338-340 ft./lbs.

 

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

 

Engine Block Specifications
Casting Numbers	12576177, 12576178, 1589779
Material	Iron
Displacement	5.3L / 325 c.i.d.
Bore Dia.	3.780 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	Flat Top
Piston Volume	0cc
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 Casting Number (last three digits)	143
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	799, 243
Material	Aluminum
Combustion Chamber Volume	65cc
Intake Port Shape	Cathedral
Intake Runner Volume	210cc
Exhaust Port Shape	D-Port
Exhaust Runner Volume	75cc
Intake Valve Dia.	2.000 in.
Exhaust Valve Dia.	1.575 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°/201°
Valve Lift (int./exh.)	0.481 in./0.481 in.
Lobe Separation	116°+2
Cam Gear Attachment	1-Bolt
Cam Gear Poles	4X
Active Fuel Management (AFM)	Yes
Variable Valve Timing (VVT)	No

 

Valvetrain Specifications
Lifter Style	Hydraulic Roller
Lifter Link Style	Plastic Lifter Tray
Lifter Body Dia.	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	None
Valve Spring Style	Beehive
Valve Spring Color	Natural
Valve Angle	15 degrees
Intake Valve Material	Steel, Solid Stem
Intake Valve Dia.	2.000 in.
Exhaust Valve Material	Steel, Solid Stem
Exhaust Valve Dia.	1.575 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	29.6 lb/hr @ 58 psi
Flex Fuel Capable (E-85)	No
Fuel Injector Length (between O-rings)	1.900 in.
Fuel Injector Connector	EV6
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.)