The L59 engine is a 5.3L Gen. III iron-block engine used in GM trucks and SUVs between 2002 and 2007. It is essentially the flex-fuel version of the LM7.
For marketing purposes, it was also known as the Vortec 5300. The engine specs and information listed here is for a stock L59 engine.
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.
[Looking to upgrade your L59 engine? Check out L59 5.3L Engine Upgrade Guide: Expert Advice for L59 Mods to Maximize Performance.]
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 L59 5.3L Vortec 5300.
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.)
L59 5.3L Vortec 5300 Engine Specs
L59 Performance Specifications
|Horsepower Rating||285-295 hp|
|Torque Rating||320-335 ft./lbs.|
|VIN 8th Digit||Year||Make||Model|
|Z||2002-06||GMC||Yukon XL 1500|
L59 Engine Blocks
|L59 Engine Block Specs|
|Casting Numbers||12567392, 12567393, 12551358|
|Displacement||5.3L / 325 c.i.d.|
|Bore Dia.||3.780 in.|
|Deck Height||9.230-9.240 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 = 2.326, Bore 2/4 = 2.317, Bore 3 = 2.307 (1999-2003)|
|Cam Housing Bore Dia.||Bore 1/5 = 2.346, Bore 2/4 = 2.326, Bore 3 = 2.307 (2003-2007)|
|Cam-to-Crank Centerline||4.914 in.|
L59 Rotating Assembly
|L59 Rotating Assembly Specs|
|Piston Material||Hypereutectic Cast Aluminum Alloy|
|Wrist Pin Dia. (2002-04)||0.9447 in., 0.9448 in. (pressed)|
|Wrist Pin Dia. (2005-07)||0.9429 in., 0.9431 in. (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 3 digits)||143|
|Crankshaft Material||Cast Iron|
|Crankshaft Main Journal||2.559 in.|
|Crankshaft Rod Journal||2.100 in.|
L59 Cylinder Heads
|L59 Cylinder Head Specs|
|Casting Numbers||862, 706|
|Combustion Chamber Volume||61cc|
|Intake Port Shape||Cathedral|
|Intake Runner Volume||200cc|
|Exhaust Port Shape||Oval|
|Exhaust Runner Volume||70cc|
|Intake Valve Diameter||1.890 in.|
|Exhaust Valve Diameter||1.550 in.|
|Cylinder Head Bolt Style||Torque to Yield (TTY)|
|Cylinder Head Bolt Size (2002-03)||(8) M11 x 2 x 155, (5) M8 x 1.25 x 45|
|Cylinder Head Bolt Size (2004-07)||(10) M11 x 2 x 100, (5) M8 x 1.25 x 45|
L59 Camshaft Specifications
|L59 Camshaft Specifications|
|Duration @ .050 in. (int./exh.)||191°/190°|
|Valve Lift (int./exh.)||0.457 in./0.466 in.|
|Cam Gear Attachment||3-Bolt|
|L59 Valvetrain Specs|
|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|
|Valve Spring Style||Beehive|
|Valve Spring Color||Natural|
|Valve Angle||15 Degrees|
|Intake Valve Material||Steel - Solid Stem|
|Intake Valve Dia.||1.890 in.|
|Exhaust Valve Material||Steel - Solid Stem|
|Exhaust Valve Dia.||1.550 in.|
Other Key L59 Specs
|Throttle Body, Fuel Injectors, Oil Pan Specs & More|
|Throttle Control||Electronic (Drive-by-Wire), except some 2002 models without traction control|
|Fuel Injector Flow||33 lb./hr. @ 50 psi, Return-Style (2002-04)|
|Fuel Injector Flow||36.6 lb./hr. @ 58 psi, Returnless (2005-07)|
|Fuel Injector Length (between O-Rings)||2.5 in.|
|Fuel Injector Connector||Mini-Delphi / Multec2|
|Fuel Rail||Plastic (2002-03), Stainless Steel (2004-07)|
|Crankshaft Reluctor Ring||24x|
|Camshaft Sensor Location||Rear mount, 1x on camshaft|
|Oil Pan||Deep rear sump|
|Oil Pump||Standard volume|
NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades.
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Very good information.
Please where is the engine number on a :
GMC 2003 Yukon located?
I’ve got a 2004 suburban for my 5.3 swap. 92mm sheetmetal intake. Can I use a 4 bolt LS3 90mm drive by wire throttle body w/ minimal alterations?
Would i be able to get this engine from a suburban into a fwd monte carlo, or should I just find the ones that were already front wheel drive the ls4