2003 Chevy Venture wiper motor

Under the hood on the pasenger side you will see where the wiper linkage underneath the hood goes to a black square box monted to the firewall. Spray and soak it with any lubricant like WD-40 etc. This may loosen the pin that parks the wipers. If not while it is soak with lubricant have the wipers on low and tap the side of the square unit I mentioned above with a hammer - lightly.

This may allow the set pin to return allowing the wipers to park.

Try this before taking it to anyone that will charge you to do the same thing.