Hey guys, been a while since I have been on here. So last night I went shooting drove to my favorite little spot and had to throw it in 4 wheel to get there... After I started the truck back up to go home I have a constant squeak that sounds like it's coming from the drivers side pulley area... Maybe from around the vacuum pump area...

I had an occasional squeak before but wrote it off to dirty brakes or something... Also the two idiot lights on the dash for the brakes are on...

The serpentine belt is in good shape, With the belt on the pulleys them self seem fine... but I have not taken the belt off and checked each pulley really well..


Any ideas on what this could be? vacuum pump, pulley... or ?

The truck is a 97 psd, stock except for a down pipe and cold air intake. The EPV is unplugged too.

Hope you guys can help,
Thanks.

 

a/c pump .... possibly wheel hub bearing ... ... could be all kinds of stuff .. gonna need to narrow it down systematicly .... is it rpm sensitive, speed sensitive etc..

 

I don't use the ac it's never worked, it does no change with rpm or speed... Just gets drown out by the engine noise

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also the abs and ebrake lights are on on the dash

 

Harbour Freight sells a mechanic's stethoscope for $5 that might help pinpoint this issue. Touch probe against suspect areas with engine running & listen for amplification of squeaking in earpieces.