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ZZDaryl, Chevy Technician
Category: Chevy
Satisfied Customers: 12548
Experience:  28 year experience, Master Mechanic
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2000 chevy blazer: 4.3 fuel pump makes humming noise, it

Resolved Question:

my 2000 chevy blazer 4.3 fuel pump makes humming noise, it does not do it all the time. thank you.
Submitted: 7 years ago.
Category: Chevy
Expert:  ZZDaryl replied 7 years ago.
The pump usually does make a humming noise although the noise can change a bit depending on how full or empty the tank is. But if it seems to change from one minute to another the pump is probably beginning to fail.
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