CHEVROLET 2009 Impala - Manual (Page 304)

To remove and replace the wiper blade element do the
following:
1. The wiper blade element has two notches at one
end which are engaged by the bottom claw set of
the wiper blade. At the notched end of the wiper
blade, pull the wiper blade element from the wiper
blade assembly.
2. To replace the element, start at the heel end of the
wiper blade, which is the end nearest to the base of
the wiper arm, and slide the wiper blade element,
notched end last, into the wiper blade claw sets.
3. To engage the last claw into the notched end of
the wiper blade element, squeeze the wiper blade
element at the notched area, and push the wiper
blade element so the claw fits into the notch.
4. Be sure the two wiper blade element notches are
engaged by the last claw set, and that all the other
claws are properly engaged in the slots of the wiper
blade element on both sides.
A. Correct Installation
B. Incorrect Installation
For the proper type and size windshield wiper blades,
see Maintenance Replacement Parts on page 6-13.
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