Where the wiper blade are meets the spline there is what looks to be a vertical tab extending from the arm pivot point on the windshield side. Pull straight out, not up, on that tab and that will release the locking spline of the arm. Then it is a simply matter of lifting the arm up and off the pivot arm.
What are you removing? The blades or the arms
theres a nut on the end of the wiper arm i think it a 14mm
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Lift the wiper blade off the windshield so that it stays at approximately 90 degrees. Down at the base is a little slide with an angled piece sticking up. Pull out on the slide and the wiper arm should lift right off.
I've got a better question, why is this question in the Chevy venture forum ?
The 2004 Chevrolet Tahoe has hook-end wiper arms. Press a little tab where the wiper blade is inserted into the hook. Then pull the wiper blade out of the hook. Be sure to purchase the correct replacements first by looking up your vehicle in the wiper blade books at the store or lookup wiper blade size online. Below are some videos - watch the videos for U-Hook arms.
You don't have to remove wiper arm. The wiper blade will slide out, It has a clicker in the center of the blade that you have to slide it out. Look at it very carefully
To replace the rear wiper blade on a Chrysler Pacifica, you must first remove the old blade. You can remove it by pushing the small blade that holds the wiper in place up, and push the blade back. Once the blade is free from the hook remove it. Put the new blade in position so the hook is in position to go over the wiper attachment. Clip it into position and you are done.
The 2006 Chevrolet Silverado 1500 pickup wiper blade sizes are 22" wiper blades on both sides front. See sources and related links below for more information. Since there are over 22 different wiper arm attachments, do not buy wipers just by length only - be sure to lookup exact wiper blade part numbers by vehicle make, model and year for the brand wiper you decide to purchase. This ensures correct length AND correct attachment.
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The 2002 Chevrolet Venture has a fairly common hook-end rear wiper blade arm. See related link below for video. Press tab or button that is located in the area where the wiper blade is inserted into the hook. Pull wiper blade out of hook. Sometimes you need to rotate and flex the wiper blade a little bit to make enough clearance.