Where is the wiper control module located on a 2003 gmc Sonoma

Should be right near the blend door as it turns the gears on the door...look under dadh near left of steering column. ..cheers

Powertrain Control Module (PCM)
On the right side of the engine compartment

Sounds like you have a blown fuse or relay

Replace the wiper motor. The module is built into it. And it has lost it's park position.

The combination switch on the steering column operates a relay located under the hood to operate the Hi beams. The body control module controls it's operation too.

It is located behind the panel in the back passenger side. Just inside the the back hatch.

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That code is for your evap vent valve by your evap canister back by the tank I would check the connection on the vent valve and make sure its not corroded or unplugged there isn't a specific relay that controls it its part of a bigger circuit

The PCM for what ?
There are several PCM ( part controle modules) in any given vehicle... Most are integrated in the ECU .

have you checked all the other components such as plugs, coils, wires? It may be the ignition control module. Check your local Auto Zone-they may be able to test it for you.