Water Pump Cleaning and Inspection
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
 Courtesy of GENERAL MOTORS COMPANY
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Clean the water pump assembly (1).
- Clean the water pump mating surfaces.
- Inspect the water pump gear for damage.
- Inspect the water pump mating surfaces for damage.
- Inspect the water pump shaft for looseness.
- Inspect the water pump assembly for damage.
- Replace the water pump if any damage is found.