For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningWindshield Wiper/Washer
The windshield wiper/washer lever is on the right side of the steering column.
With the ignition in ACC/ ACCESSORY or ON/RUN, move the windshield wiper lever to
select the wiper speed.
HI: Use for fast wipes.
LO: Use for slow wipes.
INT: (Intermittent Wipes): Move the lever up to INT for ...
Removal Procedure
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface
section.
Disable the SIR System. Refer to SIR Disabling
and Enabling.
Disconnect the negative battery cable. Refer to Battery Negative Cable
Disconnection and Connection.
Remove the front side door. Refer t ...
Installation Procedure
Cut the front compartment front rail in corresponding locations to fit
the remaining original panel. The sectioning joint should be
trimmed to allow a gap of one-and-one-half-times the metal thickness at the
sectioning joint.
Create a 50 mm (2 in) backing plate from the unused porti ...