OT Chevy Avalanche question

dr sportster · Oct 3, 2016

Strange humming noise by rear of truck like a struggling whine. I can only guess my in tank fuel pump is about to fail? { 2002]

oldtanker · Oct 3, 2016

(quoted from post at 16:42:13 10/03/16) Strange humming noise by rear of truck like a struggling whine. I can only guess my in tank fuel pump is about to fail? { 2002]

That would be my guess.

Rick

RayP(MI) · Oct 3, 2016

Try to get an ear close to fuel tank and trigger ignition to run pump without starting engine. May need a computer to do this.

Texasmark1 · Oct 4, 2016

SWAG: Wouldn't the fuel pump start as soon as the ignition was switched to on? I guess when the rail pressure reaches 40# (?) there is a shut off switch for the pump??????? Why wouldn't that work if you are quick with your ear?????

Determined · Oct 4, 2016

The pump will whine pretty good if the fuel filter is getting plugged up.

If it is the pump then not a big deal to drop the tank, another option you can find measurements and photos for on the internet, is to cut a small access door under the drivers side rear seat.
Once done then changing the pump is a half hour job.

OT Chevy Avalanche question

dr sportster

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oldtanker

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RayP(MI)

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Texasmark1

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Determined

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