Type
4.8L V8
Displacement
4807 cc (293 ci)
Compression Ratio
9.5:1
Valve Configuration
Overhead Valves (2 valves per cylinder)
Valve Lifters
Hydraulic Roller
Firing Order
1 - 8 - 7 - 2 - 6 - 5 - 4 - 3
Bore x Stroke
96.01 x 83.00 mm
Fuel System
Sequential Fuel Injection
Horsepower
285 hp (213 kw) @ 5600 rpm
Torque
295 lb-ft (400 Nm) @ 4000
Fuel Shut-off
5600 rpm with manual transmission
5900 rpm w/auto and ETC
6000 rpm w/auto without ETC
Emissions Controls
Evaporative System
Catalytic Converter
Positive Crankcase Ventilation
Returnless Fuel System
Block
Cast Iron
Cylinder Head
Cast Aluminum
Intake Manifold
Composite
Exhaust Manifold
High Silicon Molybdenum
Cast Nodular Iron
Main Bearing Caps
Powered Metal
Crankshaft
Cast Iron with undercut and rolled Fillets
Camshaft
Steel
Connecting Rods
Powered Metal
Additional features
Extended Life Spark Plugs
Extended Life Coolant
Oil Level Sensor
Oil Life System
Electronic Throttle Control
Floating Pin Pistons
4.8L Vortec Specs
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