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Re: 04 grand prix vss
The VSS wire (output) is located at the electrical connector located on top of the VSS. Does the system you are installing require a raw VSS signal before the PCM module or data after it has been processed by the PCM module. Also, you can tap into the VSS signal at the PCM module connectors. Which wire and pins by color coding you would have to refer to the GM FSM wiring diagrams for your year Grand Prix. I do not have that data.
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