Chevrolet 2007 TrailBlazer Owner's Manua page 445

Do not allow the wiper blade arm to touch the
windshield.
1. To remove the old wiper blades, lift the wiper
arm until it locks into a vertical position.
A. Blade Assembly
B. Arm Assembly
C. Locking Tab
D. Blade Pivot
E. Hook Slot
F. Arm Hook
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. Remove the insert from the blade assembly.
The insert has two notches at one end that
are locked by the bottom claws of the
blade assembly. At the notched end, pull the
insert from the blade assembly.
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