LS Engines

L9H 6.2L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More

L9H engine 6.2L

(Image/eBay)

Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even Saab, Hummer, and Isuzu got some LS love.

Since LS and Vortec engines are so common, they’ve become the go-to performance and swap engines of the modern era.

These motors are capable of making a lot of horsepower, and respond well to upgrades like turbos, superchargers, high-flow cylinder heads, intake systems, cams, and nitrous oxide.

The aftermarket is strong, crate engines are available, and used motors are often cheaply sourced through junkyards.

Summit Racing has created a series of comprehensive guides for each engine in the LS family, so engine builders and tuners can have a handy reference for their projects.

This specific guide is for the GM L9H 6.2L Vortec 6200.

You can find more LS engine spec guides and LS-related information here.

(Summit Racing’s Paul Spurlock and Brian Nutter contributed to this article.)

L9H 6.2L Vortec 6200 Engine Specs

The L9H is a 6.2L, Gen. 4, small block engine used in GM luxury trucks and SUVs between 2009 and 2013. For marketing purposes, it was also known as the Vortec 6200. The information listed here is for a stock engine.

L9H Performance Specifications

Engine Ratings
Compression Ratio10.5:1
Horsepower Rating403 hp
Torque Rating417 ft./lbs.

L9H Applications

VIN 8th DigitYearMakeModel
22009CadillacEscalade ESV, EXT
22009ChevroletTahoe LTZ
22009GMCYukon Denali
22009-13GMCYukon XL 1500 SLT
22009-13GMCSierra 1500 Denali, SLE, SLT
22010-13ChevroletSilverado 1500 LT, LTZ

L9H Engine Blocks

L9H Block Specs
Casting Number12584724
MaterialAluminum
Displacement6.2L / 376 c.i.d.
Bore Dia. 4.065 in.
Stroke3.622 in.
Deck Height9.240 in.
Bore Spacing4.400 in.
Thrust Bearing Location#3 Main
Main Cap Style6-Bolt
Main Housing Bore Dia.2.751 in.
Cam Housing Bore Dia.Bore 1/5 = 2.346, Bore 2/4 = 2.326, Bore 3 = 2.307
Cam-to-Crank Centerline4.914 in.

L9H Rotating Assembly

L9H Rotating Assembly Specs
Piston MaterialHypereutectic Cast Aluminum Alloy
Piston StyleFlat Top with Valve Reliefs
Piston Volume+3cc
Wrist Pin Dia.0.9431 in. (full floating)
Connecting Rod MaterialPowdered Metal
Connecting Rod StyleI-Beam
Connecting Rod Length6.098 in.
Connecting Rod Housing Bore2.225 in.
Connecting Rod BoltsM9 x 1 x 43
Connecting Rod Part Number12649190
Crankshaft MaterialCast Iron
Crankshaft Part Number12588613
Crankshaft Main Journal2.559 in.
Crankshaft Rod Journal2.100 in.
Reluctor Wheel58x

L9H Cylinder Heads

L9H Cylinder Head Specs
Casting Numbers5364, 823
MaterialAluminum
Combustion Chamber Volume70cc
Intake Port ShapeRectangle
Intake Runner Volume257cc
Exhaust Port ShapeD-Port
Exhaust Runner Volume87cc
Intake Valve Diameter2.165 in.
Exhaust Valve Diameter1.590 in.
Cylinder Head Bolt StyleTorque to Yield (TTY)
Cylinder Head Bolt Size(10) M11 x 2 x 100, (5) M8 x 1.25 x 45

L9H Cam Specifications

L9H Camshaft Specs
Camshaft Part Number12623065
Duration @ .050 in. (int./exh.)198°/209°
Valve Lift (int./exh.)0.500 in./.500 in.
Lobe Separation115°
Cam Gear Attachment1-Bolt
Cam Gear Poles4x
Active Fuel Management (AFM)No
Variable Valve Timing (VVT)Yes

L9H Valvetrain

L9H Valvetrain Specs
Lifter StyleHydraulic Roller
Lifter Link StylePlastic Lifter Tray
Lifter Body Diameter0.842 in.
Pushrod Length7.385 in.
Rocker Arm Mounting StylePedestal
Rocker Arm StyleDie-Cast, Roller Fulcrum
Rocker Ratio1.7
Rocker OffsetIntake Rocker
Valve Spring StyleBeehive
Valve Spring ColorNatural
Valve Angle15 Degrees
Intake Valve MaterialSteel - Solid Stem
Intake Valve Dia.2.165 in.
Exhaust Valve MaterialSteel - Solid Stem
Exhaust Valve Dia.1.590 in.

Other Key L9H Specs

Throttle Body, Fuel Injectors, Oil Pan Specs & More
Intake ManifoldTruck-style
Throttle Body87mm, 4-bolt
Throttle ControlElectronic (drive-by-wire)
Fuel Injector Part Number12609749
Fuel Injector Flow54 lbs./hr. at 58 psi
Flex Fuel Capable (E-85)Yes
Fuel Injector Length (between O-Rings)1.500 in.
Fuel Injector ConnectorEV6-USCAR
PCME38
Crankshaft Reluctor Ring58x
Camshaft SensorFront mount, 4x on cam
Oil Pan Sump LocationDeep rear sump
Oil PumpHigh volume (1.25 c.i. per rev. @ 33 psi)
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9 Comments

  1. Some one who doesnt own gm crap says:

    Yay!!! More gm ls love fest. It’s so awesome! We don’t want to hear anything at all about what Mopar and Ford have to offer! Yay! Gm is all that matters! Hurray!

  2. harold hecuba says:

    if the “others” would make something worth while, maybe it would be discussed!

    • Wont ever own gm built garbage says:

      The Mustang has been taking the Camaro’s lunch money since the 5.0 came back. The Demon is the most powerful musclecar factory built by the big 3. The only reason that gm keeps getting discussed is because you have to figure out how to keep up with the other 2

  3. Steve Jackson says:

    Typical ford fan that reads to many magazines! You have to appreciate them all. (The big 3) The big 3 have all made bad ass cars and they’ve all made POS’s

    • Still wont buy generally useless motors says:

      Actually my 14 AWD Charger RT already eats 5.0’s and SS’s. But I have had to do a lot more research and footwork myself to build my car. Yes I said built, not bought. But with nearly 90% of the emails I see from onallcylinders.com spoonfeeding the GM crowd all the help that they need to give their pos rides a chance the gen3 Hemi isn’t getting the attention it deserves.

      So I guess that makes you the idiot

      • DeadEyeDick says:

        Dude sit down your gen 3 HEMI is a cam-trashing pos. The LS engine platform is the most maintenance friendly and reliable platform. You can laugh all you want, but you won’t see someone take a junk yard truck-style HEMI or 5.0 engine and make 800+ horsepower reliably. Tear down an LS and a 5.7, 6.1 or 6.4 HEMI and they’re almost identical. Thanks for the shout out Chrysler…I mean Fiat lol

  4. David Allen LaCoste Jr says:

    Hello, I’m trying to upgrade my 2009 l9h with a new slightly more aggressive attitude but still be a daily driver for the wife looking to change heads ,cam, add long tube headers, cold air intake, aftermarket exhaust, and a performance tune. Which heads and compatible parts would you recommend for this roughly 600 to 700 hp build?

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