Chevrolet EXPRESS - 2011 Manual page 309

Windshield wiper blades should be
inspected for wear and cracking.
See
for more information on
wiper blade inspection.
Replacement blades come in
different types and are removed in
different ways.
To remove the type with a release
clip, do the following:
1. Lift the wiper arm until it locks
into a vertical position.
2. Press down on the blade
assembly pivot locking tab.
Pull down on the blade
assembly to release it from
the wiper arm hook.
3. The insert has two notches at
one end that are locked by
bottom claws of the blade
assembly. At the notched end,
pull the insert from the
blade assembly.
4. To install the new wiper insert,
slide the notched end last, into
the end with two blade claws.
Then slide the insert all the way
through the blade claws at the
opposite end.
5. Make sure that the notches are
locked by the bottom claws.
Make sure that all other claws
are properly locked on both
sides of the insert slot.
6. Put the blade assembly pivot in
the wiper arm hook. Pull it up
until the pivot locking tab locks
in the hook slot.
7. Carefully lower the wiper arm
and blade assembly into the
windshield.