Quote:
Originally Posted by vtirocz
The high pressure pump is not moving until the engine is spinning though. That's the low pressure pump you're hearing. If that helps, GM should set it up to pressurize on the low pressure side every time the driver's door is opened, so the driver does not have to go through any extra steps.
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Or since it seems to be time related since last start every time after 1 or 2 hours since I open and close my door often when cleaning. That would save the pump some wear.