GMC 2007 Sierra - Manual (Page 542)

Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for
wear and cracking. See Scheduled Maintenance
(Gasoline Engine) on page 617 for more
information.
Replacement blades come in different types and
are removed in different ways. For proper type and
length, see Normal Maintenance Replacement
Parts (Gasoline Engines) on page 632.
To replace the windshield wiper blade assembly
do the following:
1. Lift the wiper arm away from the windshield.
2. Push the release lever (B) to disengage the
hook and push the wiper arm (A) out of the
blade (C).
3. Push the new wiper blade securely on the
wiper arm until you hear the release lever
click into place.
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