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Plenum Chamber and Drain Valve-Cleaning

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

The plenum chamber is located in front of the windshield and below the air inlet grille panel.

  1. Remove the air inlet grille panel. Refer to Plenum Water Deflector Replacement - Center .
  2. Clean the plenum chamber, drains and the air inlet grille panel of debris blockage.
  3. Flush the plenum chamber, drains and the air inlet grille panel with clean water.
  4. Install the air inlet grille panel. Refer to Plenum Water Deflector Replacement - Center
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