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L59

L59 Vortec 5.3L V8 "GEN III"

Vehicle Applications

  • 2002–2006 Chevrolet Tahoe
  • 2002–2006 Chevrolet Suburban 1500
  • 2002–2006 GMC Yukon
  • 2002–2006 GMC Yukon XL 1500
  • 2002–2007 Chevrolet Avalanche Z71
  • 2002–2007 Chevrolet Silverado 1500
  • 2002–2007 GMC Sierra 1500

Product Highlights

  • Gen III Iron Cylinder Block
  • Cathedral Port Aluminum Cylinder Heads
  • Drive By Wire (Electronic Throttle) *except some 2002 models without traction control
  • 24X Ignition Systems


L59 Engine Specs (VIN "Z")

The information listed here is for the stock engine.

Performance Specifications

Compression Ratio 9.5:1
Horsepower Rating 285-295 hp
Torque Rating 320-335 ft./lbs.

 

Application Information

VIN 8th Digit

Year

Make

Model

Z

2002-2006

Chevrolet

Tahoe

Suburban 1500

GMC

Yukon

Yukon XL 1500

2002-2007

Chevrolet

Avalanche Z71

Silverado 1500

GMC

Sierra 1500

 

Engine Block Specifications

Casting Numbers

12567392, 12567393, 12551358

Material

Iron

Displacement

5.3L / 325 cid

Bore Dia.

3.780 in.

Stroke

3.622 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 Diameter

2.751 in.

Cam Housing Bore Diameter

Bore 1/5 = 2.326, Bore 2/4 = 2.317, Bore 3 = 2.307 (1999-2003)

Bore 1/5 = 2.346, Bore 2/4 = 2.326, Bore 3 = 2.307 (2003-2007)

Cam-to-Crank Centerline

4.914 in.

 

Rotating Assembly Specifications

Piston Material

Hypereutectic Cast Aluminum Alloy

Piston Style

Dished

Piston Volume

+8cc

Wrist Pin Dia. (2002-2004)

0.9447 in., 0.9448 in. (Pressed)

Wrist Pin Dia. (2005-2007)

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 Bolts

M9 x 1 x 43

Crankshaft Material

Cast Iron

Crankshaft Main Journal

2.559 in.

Crankshaft Rod Journal

2.100 in.

Reluctor Wheel

24x

 

Cylinder Head Specifications

Years

2002-2007

Casting Numbers

862,706

Material

Aluminum

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 (2002-2003)

(8) M11 x 2 x 155, (2) M11 x 2 x 100, (5) M8 x 1.25 x 45

Cylinder Head Bolt Size (2004-2007)

(10) M11 x 2 x 100, (5) M8 x 1.25 x 45

 

Camshaft Specifications

Years

2002-2007

Duration at .050 in (int./exh)

191/190

Valve Lift (int./exh)

0.457 in./0.466 in.

Lobe Separation Angle (in degrees)

114

Cam Gear Attachment

3-Bolt

 

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

None

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 Specifications

Intake Manifold

Truck Style

Throttle Control

Electronic (Drive-by-Wire), except some 2002 models without traction control

Fuel Injector Flow

33 lbs./hr. @ 50 psi, Return Style (2002-04)

36.6 lbs./hr. @ 58 psi, Returnless (2005-07)

Fuel Injector Length (O-ring to O-ring)

2.500 in.

Fuel Injector Connector

EV6-USCAR

Fuel Rail

Plastic (2002-03), Stainless Steel (2004-07)

PCM

Warren

Crankshaft Reluctor Ring

24x

Camshaft Sensor

Rear Mount, 1x on Camshaft

Oil Pan

Deep Rear Sump

Oil Pump

Standard Volume