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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15133
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Getting a hum at about 25 miles per hour on my 2007 chevy

Customer Question

getting a hum at about 25 miles per hour on my 2007 chevy avalanche gets louder as i go faster goes away the minute I let up on the gas
JA: Has the vehicle turned into a gas hog? And how does it start -- same as usual?
Customer: no gas hog immediate start as usual
JA: Are you fixing your Avalanche yourself? What have you tried so far?
Customer: no, take it in usually stopped going to dealer using local garage
JA: Anything else you want the mechanic to know before I connect you?
Customer: I have owned this since i bought off show room floor. just late had tires rotated, alingnment, and rear break seal leaking repaired.
Submitted: 10 days ago.
Category: Chevy
Expert:  Eric replied 10 days ago.


Does the sound seem like it is coming from the rear end, front end, engine compartment?

Does it make the humming noise if maintaining a steady speed above 25mph, or only when accelerating?

Customer: replied 10 days ago.
Not sure where it's coming from because i do not have the ability to lift the truck at the moment. Again, it seems to start at about 25 mph and gets louder as i accelerate, if I coast (take foot off gas) noise goes away.
Expert:  Eric replied 10 days ago.


does the noise change or disappear if you turn either left or right while accelerating above 25mph

Customer: replied 9 days ago.
Expert:  Eric replied 9 days ago.


Ok, I will opt out at this point as I am not sure what the humming noise is in this case. If another expert knows, they will post here to you

Expert:  Gary replied 9 days ago.

new expert here

did you still need help ?

Expert:  Gary replied 8 days ago.

did you still need help ?

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