I need a completa diagram of vortec v6 4.3l engine

You can find a pin diagram for the GM Vortec 6000 with LQ4 engine ignition coil/connector online. You can search for diagrams specific to your vehicle by searching for the make, model, and year of your vehicle. You can also find diagrams for specific parts of your vehicle, such as the engine, transmission, and electrical system.

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Look for the emissions label inside the engine compartment, they usually have the emission routing schematic for your car there. Failing that your local library has access to online service manuals, you can get the info there, free.

For the 1999 Chevrolet WITH 5.7L V8:

Firing Order:
1-8-4-3-6-5-7-2

Cylinders:
.........(back).........
'...8...'........'...7...'
'...6...'........'...5...'
'...4...'........'...3...'
'...2...'........'...1...'
.........(front)

Distributor Connections:
............(back)
Coil--->o
6------->o........o
4------->o........o
2------->o........o
8------->o........o
.............(front)

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