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 WarningInstallation Procedure
Prepare all mating surfaces as necessary.
Align the body lock pillar outer panel reinforcement.
Create 8 x 24 mm (5/16 x 15/16 in) slots for MIG-brazing upper (1) and
lower (2).
Clean and prepare the attaching surfaces for spot welding and brazing.
Position the body loc ...
Removal Procedure
Remove the drivetrain and front suspension frame. Refer to Drivetrain
and Front Suspension Frame Replacement.
Mark Installation position of insulator (2) at frame (1).
Cut out frame insulator core (1) from frame insulator (2).
Note: On the rear insulator dril ...
Windshield 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 ...