Kevin,
I think your confusing the VSS-speed sensor with the Knock sensor/ESC.
The VSS has the brown wire and connects directly to the ECM at pin A10. The other wire goes to ground which on GM is blk/wht.
From the factory some also T off the brown to the ALDL connector but it is not needed since speed data is output thru the ALDL data stream when you log data or use a scanner.
The knock sensor connects to the ESC which is the little 3x3 black part. It hen sends the signal to the ECM pin B7 on a blk wire.
Any relay will work as long as it it connected properly.
All the ones i have seen have a little diagram on them so it doesn't really matter what the pin letter/number are. Just match the wire to the diagram.
There is a ground and 12V from a switched source that turns on the relay.
Then there is normally a batt 12v setting on one of the contacts and when the relay is on it passes that 12v to the output where you have the fuel pump or ECM or injectors or anything else connected.
There are several factory relay examples in the diagrams provided on binderplanet and in the wiring FAQ I give the standard Bosch connections also. Bosch can be 4 or 5 pin. They can have 2- 87 outputs or an 87 and a 87a. Each version is a little different so refer to the wiring FAQ.
So all bases are covered.
