Vehicle Applications

• 2009 Cadillac Escalade ESV, EXT
• 2009 Chevrolet Tahoe LTZ
• 2009 GMC Yukon Denali
• 2009–2013 GMC Yukon XL 1500 1500 SLT
• 2009–2013 GMC Sierra 1500 Denali, SLE, SLT
• 2010–2013 Chevrolet Silverado 1500 LT, LTZ

Product Highlights

• Gen IV Aluminum Cylinder Block
• Rectangular Port Aluminum Cylinder Heads
• Variable Valve TIming (VVT) 
• E85 Flex-Fuel Capability
• Advanced Electronic Throttle Control
• 58X Ignition System

L9H Engine Specs (VIN "2")

 The information listed here is for a stock engine.

Performance Specifications
Compression Ratio	10.5 : 1
Horsepower Rating	403 hp.
Torque Rating	417 ft./lbs.

 

Application Information
VIN 8th Digit	Year	Make	Model
2	2009	Cadillac	Escalade ESV, EXT
		Chevrolet	Tahoe LTZ
		GMC	Yukon Denali
	2009-13		Yukon XL 1500 SLT
			Sierra 1500 Denali, SLE, SLT
	2010-13	Chevrolet	Silverado 1500 LT, LTZ

 

Engine Block Specifications
Casting Number	12584724
Material	Aluminum
Displacement	6.2L / 376 c.i.d.
Bore Dia.	4.065 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 with valve reliefs
Piston Volume	+3cc
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	12649190
Crankshaft Material	Cast Iron
Crankshaft Part Number	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
Cam P/N	12623065
Duration @ .050 in. (int./exh.)	198°/209°
Valve Lift (int./exh.)	0.500 in./.500 in.
Lobe Separation	115°
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
Intake Manifold	Truck-Style
Throttle Body	87mm, 4-bolt
Throttle Control	Electronic (Drive-by-Wire)
Fuel Injector P/N	12609749
Fuel Injector Flow	54 lb/hr @ 58 psi
Flex Fuel Capable	Yes
Fuel Injector Length (between O-rings)	1.500 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	High Volume (1.25 c.i. per rev.) @ 33 psi