the park tab is bent. it is a thick piece of metal that must be bent back slightly toward the wiper motor with a hammer or plyers.
I assume this issue started when there was snow/ice on the windshield?
replace the wiper motor
There is a problem with the parking linkage. TAke it to a garage.
I've got a better question, why is this question in the Chevy venture forum ?
Refer to the link below. It'll take you to the answer elsewhere on this web site.
They could be stuck, possibly from snow, ice, or other types of precipitation.
You can detailed instructions on how to reset your wipers on youtube.com/watch?v=KFBLtlnkpuI
A bad pulse board or window wiper motor can cause your wipers to stay in the "up" position.
The car wipers should not stay up but return to their original position. The wipers will stay up if the wiper motor, the wiper controller and the wiper linkage are faulty.
There are two positions for the wipers on an ES330, winter and summer position. The summer position is down under the hood, and the winter position is where I imagine they are now. To switch between the two, just requires a push down to summer position, or a tug up to winter position. The idea between the two positions is that in winter, with snow on the car, the wipers won't get stuck underneath the hood, but during the summer, when that isn't a concern, they can be tucked out of the way for a cleaner look.
What do you mean by "stuck". I assume the wiper switch is in the turn signal lever? It could mean that the wiper motor assembly is faulty. The motor assembly has a position sensor that keeps the motor running until the wipers come to rest at the appropriate position. If that sensor has failed you will need to replace the wiper motor.
why is it after I hooked up the linkage for my wipers the wipers stay in the upright position after I turn them off.
Sometimes there is a racket system and the wipers have slipped. Used to happen all the time in my 1998 Buick. Always had to take them apart and put them back together.