Q: When at idle and accelerating, my 2006 Chevy Silverado 5.3 4x4 is making a humming sound 2006 Chevrolet Silverado
When at idle or accelerating is making a humming sound. Sometimes the temp gage goes over normal temp when running. Smell of coolant comes from vent when this happens.coolant level hasn't changed. Front passenger seat does not have coolant on it. Any advice?
My car has 155000 miles.
My car has an automatic transmission.
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