Car is 2012 Chevy Avalanche, engine 5.3-liter Vortec 5300 V8. The wipers barely move and the windows move with effort while the car is running. Looking this up I see there are a number of reasons for the individual issues, but I was wondering if there can be one unifying problem that would cause the two to start failing at the same time.
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Check your battery while running to verify that it’s charging (14+ volts).
Sounds like a low voltage issue.