My 2003 chevy venture windshield wipers won't go back in the park position. sometimes I can move the arm around and get them to go back.

Take the wiper arm and try to move it if it's easy to move then ....we call it the transmission between wiper arm and motor itself. little teeths are gone wiper arm side or transmission

or transmission arms are disconnected

hope it help

At the base of the wiper arm there is a plastic cap,pop this off ,underneath there is a nut that holds the arm in place ,if it gets loose the post will turn inside the blade.Just turn the wipers off and tighten the nuts with the blade in the parked position.

There are nuts on the wiper arm posts under plastic caps[ if still there ] they looen sometimes and the arm won't move turn off the wipers so the 'park' and check the nut for tightness - should be quite snug. it that dosen't fix it then you have a linkage problem from the motor.

Your windshield arm is in need of repositioning. Take off the cap on the windshield arm and loosen the nut under the cap. Reposition the arm so that it faces 180 degrees flat to the passenger side of the car. Tighten the nut. This should solve the problem you've described.

It sounds as though the grounding ******** your wiper motor is not making a good ground therefore the wipers are not coming to the exact parking position. By pulling on them you pass that position and they begin to operate correctly. Thank you, Dana

Well, having just dealt with this on our 2000 Lesabre... this is an unfortunate fate for windshield wiper setups...
Basically the knurling on both the male & female portions of the wiper arm's pivot point have worn clean off, or are very close to gone.
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The following solution is my 'get it working now' fix... it's not as official and/or costly as replacing the whole wiper linkage... not to mention how difficult it may be in pulling apart the necessary components to first get at the wiper linkage, and then actually removing it from the vehicle(serious pain on some vehicles)... and then of course installing a new one, assuming you can even find/afford one through the local stealership.
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What I did, which has worked so far:
First, get access to the nut which holds the wiper arm to the pivoting point; there should be a cover or cap which will remove to expose this nut I talking about. Be sure the wiper arm is in a position that you want it in... then tighten that thing(the nut) if it's not already tight - a relative "really tight" is recommended, but do stop short of jumping on the ratchet or wrench. To verify tightness, check that wiper arm for wobble, i.e. semi-gently move/pivot it in all sorts of directions, to see whether it is actually sitting tight up against the pivoting stud that you just tightened the nut down against. I've seen the female/upper part of the wiper body lift & shift around which makes tightening things a bit of a fine tuning process until you manage to get the wiper body low & seated fully onto the pivoting stud part.
The next part is to more surely "bond" the wiper arm to the stud that it pivots on(and causes it to pivot too). Just make certain the wiper arm is tightened down in the position you want it to be(low/at-rest alike to the other wiper on the windshield) before proceeding
You'll very likely need a super hard drill bit to have success in drilling through the portion of the wiper arm that sits around the pivot-point/stud and into the stud itself some distance.
I'd suggest an 1/8" carbide drill bit(likely not available at your local hardware store, and I don't recall if anything less-hard will work to drill
that stud) acquirable via Use-Enco.com
Once a hole is drilled through the outer wiper arm metal(sometimes even as soft as aluminum, but regularly mild steel), and a good ways into the very hard pivoting stud material, get yourself an 1/8" diameter roll-pin/friction-pin in the 1/2" to 5/8" range and tap/hammer it into your newly made drill-hole. The roll/friction pin is designed to fit tight inside of an 1/8" hole so you won't find it coming out on its own(unless you didn't drill the hole deep enough, or wobbled the drill bit while drilling thus making the hole larger than 1/8").
Roll-pins, like wipers, are typically black so not much should be seen from any casual glance or typical once-over of the vehicle.
The fix should turn out to be(in every ideal sense) an easily disappearing, effective long term fix.
I hope that goes well for you.

on the wiper harm ...should be a little cap remove-it ,make shure the rignt wiper is at good spot,unscrew the left wiper arm (not shure that its a screw ,could also be a clip under the arm )how ever ,once it is out ,put -it rignt back at is rignt spot...if it is still wrong ...could be the shaft that is worn or someone could ave replaced the harm inside the hood for a wrong one

Check that you have connected the wiper motor correctly - ensure that you havent inadvertently got the polarity wrong!.
Leave the wiper arms off until you get the motor to run and park using the normal wiper on/off switch.
The motor 'park' control switching is normally an integral part of the motor drive gear and is not adjustable.
During your testing, affix a temporary indicator pointer to the end of a wiper arm drive shaft (use masking tape or similar) to prevent damage to motor or levers.

disconnect the negative battery post.
disconnect the harness from the wipper motor, using a 8mm socket, loosen the two crank arm socket screws and lock-washers until the socket releasesfrom the crank arm ball. do not remove the crank arm from the motor.
using a 10mm socket, remove the three motor retaining screws, slide the motor out of the slot in the bracket.
To install make sure the wipers are in the park position, slide the motor into the slot in the bracket. using the 10mm socket, install the three motor retaining screws and tighten to 49-80inch lbs.Using the 8mm socket tighten the two crank arm socket srews and lock washers. connect the harness to the wiper motor.connect the negative battery cable

I found problem to be that corrosion sets in between the CAMS plates that circle in an opposing fashion and does not let the wiper arms park correctly. Be very careful with this mechanism if you have the cowling off TURN the KEY and WIPERS OFF and watch your fingers so you don't get them caught.
WARNING if you leave the power on and try to move the arms This cam mechanism springs to life and will try to self park the wipers on their own so Turn the Power and Wipers Off.
SOLUTION: 1. With the ENGINE COLD, Spray a lubricant that FREE'S CORRODED PARTS like WD-40 between the gap of the 2 CAM Plates and on Top of the plates, or use some other automotive parts lubricant that free's corroded parts(let it soak for 5 minutes). 2. Gently Try to manually move the arms back and forth a little bit so that the spray works into the parts. 3. This may not be necessary but I had to do this the first time. There is a notch in the top cam that has a STUD that locks the 2 CAMs together. You can push on this STUD to unlock the cams by manually moving the wipers(use a screw driver to push on the STUD and have a friend gently move the wipers manually. Spray the area LIBERALLY with with the Lubricant Spray and see if you can move the CAMS back and forth and work the lubricant in.
Then with the wiper cover out of the way and all tools clear Try to cycle the wipers HIGH and LOW, ON and OFF a few times it may stick the first couple times with the wipers in the up position but I am confident that the lubricant will work its way in and free these CAMS the way they are supposed to. Your wipers should self park after cycling them after 5-10times. This should solve most of the problems with these wipers and should be relubricated as needed. Clean up any extra lubricant Put the wiper cover back on.