Buzzing noise

[Gecko44]

I recently bought a 2002 Yukon XL with a 5.3L engine. I hear a buzzing noise almost like a small electric motor when acclerating and the faster I go the faster the buzzing sound. Anyone experience this and knows how to get rid of the noise?

[bcopeland]

Sounds like either the fuel pump or the ABS brakes.

[bungnati]

can you tell where its coming from? I have a buzzing coming from a speaker looking thing on the driver side headliner.
Also my fuel pump went bad on a 2001 and it whined but didnt change pitch while accelerating.
I dont even know what the speaker looking thing is, too lazy to find out.

[olddriver]

Originally Posted by bungnati

can you tell where its coming from? I have a buzzing coming from a speaker looking thing on the driver side headliner.
Also my fuel pump went bad on a 2001 and it whined but didnt change pitch while accelerating.
I dont even know what the speaker looking thing is, too lazy to find out.

hello, onstar .. microphone.

[2000CAYukon]

It is not Onstar or the Microphone (part of the cell phone option). It is called an Aspirator and it is used for climate control.

See: http://townhall-talk.edmunds.com/dir.../.ee9516b/5562

//2000CAYukon

[bungnati]

Originally Posted by olddriver

hello, onstar .. microphone.

My truck doesn't have onstar. Onstar was offered in later 2001 models. I guess my truck was built with a rediness package when onstar wasn't available. I'm just wondereing why it buzzes usually onlt diring the first 5 min of running.

disregard above.

I thought it had something to do with the climate control. but why it buzzes I dunno.

[ddgolfer]

The buzzing noise is coming from a bad muffler