i need to know all the wires comming out of the firewall on drivers side i need to know what each of them do i have a chiltion manuel but it sucks thanks guys

 

Try doing a search for "C100" or "bulkhead connector".

C100 is the GM connector number for that plug you're talking about.

There really isn't a good diagram of it. In my 92 service manual, it shows the connector and the wire colors, but for each entry it just says "multi-port fuel injection V8".

In the 87 service manual, it actually says the function of the wire, e.i. "headlights" "tach" etc. But the differences between years and engine packages are pretty varied.

So you basically have to infer the function of each wire.

I can tell you that the thick purple wire goes to your starter..

 

are you looking for a specific wire and its location?