I have a 21 1500 5.7 non etorque. It drives and brakes fine but each time I have the brake pedal pushed in and then release I hear a very noticeable loud hissing from the vacuum pump for a few seconds after lifting off the brake pedal, I hear it each time I let off the pedal. No lights on the dash or stored codes. Has anyone ever had this happen to them? It’s been like this since purchased the truck.
My friends 21 limited doesn’t do this so wondering if its something I should look into.
My friends 21 limited doesn’t do this so wondering if its something I should look into.
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