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Performance Specifications |
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| Compression Ratio | 9.4:1 |
| Horsepower Rating | 300-330 hp |
| Torque Rating | 360-370 ft./lbs. |
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Application Information |
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VIN 8th Digit |
Year |
Make |
Model |
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U |
1999-01 |
Chevrolet |
Suburban |
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1999-04 |
Silverado 2500 |
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2001-07 |
Silverado 1500 HD |
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Silverado 2500 HD |
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Silverado 3500 |
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2002-04 |
GMC |
Sierra 1500 Denali |
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2001-06 |
Sierra 1500 HD (+2007 Classic) |
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1999-04 |
Sierra 2500 |
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2001-06 |
Sierra 2500 HD (+2007 Classic) |
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Sierra 3500 HD (+2007 Classic) |
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Yukon Denali, XL1500, XL2500 |
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2003-07 |
Chevrolet |
Express |
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GMC |
Savana |
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2003-07 |
Hummer |
H2 |
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Engine Block Specifications |
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| Casting Numbers |
12551364, 12573581, 12577184 |
| Material |
Iron |
| Displacement |
6.0L / 364 cid |
| Bore Dia. |
4.000 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 1st design) |
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Bore 1/5 = 2.346, Bore 2/4 = 2.326, Bore 3 = 2.307 (2003- 2007 2nd design) |
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| Cam-to-Crank Centerline |
4.914 in. |
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Rotating Assembly Specifications |
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| Piston Material |
Hypereutectic Cast Aluminum Alloy |
| Piston Style |
Dished |
| Piston Volume |
+6.7cc |
| Wrist Pin Dia. (1999-04) |
0.9447 in., 0.9448 in. (Pressed) |
| Wrist Pin Dia. (2005-07) |
0.9429 in., 0.9431 in (Full 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 |
| Flexplate/Flywheel Mounting Flange (1999-2000) |
1.250 in. |
| Flexplate/Flywheel Mounting Flange (2001-07) |
0.857 in. |
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Cylinder Head Specifications |
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| Years |
1999-2000 |
2001-07 |
| Casting Numbers |
373, 873 |
317, 035 |
| Material |
Iron |
Aluminum |
| Combustion Chamber Volume |
71cc |
71cc |
| Intake Port Shape |
Cathedral |
Cathedral |
| Intake Runner Volume |
200cc |
210cc |
| Exhaust Port Shape |
Oval |
D Port |
| Exhaust Runner Volume |
70cc |
75cc |
| Intake Valve Diameter |
2.000 in. |
2.000 in. |
| Exhaust Valve Diameter |
1.550 in. |
1.550 in. |
| Cylinder Head Bolt Style |
Torque to Yield (TTY) |
Torque to Yield (TTY) |
| Cylinder Head Bolt Size (1999 - 03) |
(8) M11 x 2 x 155, (2) M11 x 2 x 100, (5) M8 x 1.25 x 45 |
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| Cylinder Head Bolt Size (2004 - 2007) |
(10) M11 x 2 x 100, (5) M8 x 1.25 x 45 |
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Camshaft Specifications |
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| Years |
1999-2000 |
2001-07 |
| Duration at .050 in (int./exh) |
191/190 |
196/207 |
| Valve Lift (int./exh) |
0.457 in./0.466 in. |
0.467 in./0.479 in. |
| Lobe Separation Angle (in degrees) |
114 |
116 |
| Cam Gear Attachment |
3-Bolt |
3-Bolt |
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Valvetrain Specifications |
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| 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. |
2.000 in. |
| Exhaust Valve Material |
Steel - Solid Stem |
| Exhaust Valve Dia. |
1.550 in. |
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Other Specifications |
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| Intake Manifold |
Truck Style |
| Throttle Body |
80mm, 3-Bolt |
| Throttle Control |
All Cable Operated, 1999-02 |
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Drive-by-Wire phased in 2003-04, on most models |
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| Fuel Injector Flow |
24.8 lbs. |
| Fuel Injector Length (between O-Rings) |
1.9 in. |
| Fuel Injector Connector |
EV6 |
| PCM |
Warren |
| Crankshaft Reluctor Ring |
24x |
| Camshaft Sensor |
Rear Mount, 1x on cam |
| Oil Pan |
Deep Rear Sump |
| Oil Pump |
Standard Volume |