Strange noise coming from instrument cluster

[Augusto]

Hi there, my 94 Cheyenne when idling makes this noise coming from maybe inside of the instrument cluster, when i rev up a little the sound seems to be in sync with the engine, i thought it was the tachometer but most likely is not, btw my trip odometer quit working, is it possible that something broke in there and is making this noise? While driving I'm not sure if it sounds or not, too many noises around to hear this one.
Thanks for helping.

 

[Drunkcanuk]

The gears that drive the speedo and odometer are known to break. A bit of googlefoo will find you some replacements and how to do it. And the search results will probably send you right back here!!!! Lol

 

[kenh]

Are you sure it's not the radio? Quite often GM had an issue with the alternator sending a high pitched whine through the radio. It followed engine rpm.

Ken

 

[F4U-1A]

Mice?

 

[Augusto]

Are you sure it's not the radio? Quite often GM had an issue with the alternator sending a high pitched whine through the radio. It followed engine rpm.

Ken

Not the radio, it is not like you mention, rather is like a low pitched noise, besides my radio is long dead.

 

[Augusto]

Mice?

I'm gonna let a cat sleep in the cab overnight just in case...

 

[Zseventy-one]

Mine has a pulsating sound soubds like it's inside dash or under. SOme research suggested it was fuel lines making contact with the firewall/trans tunnel. It's comes and goes, seems to be louder at idle. Just an idea

 

[Augusto]

Mine has a pulsating sound soubds like it's inside dash or under. SOme research suggested it was fuel lines making contact with the firewall/trans tunnel. It's comes and goes, seems to be louder at idle. Just an idea

interesting, I'm gonna check 'em lines, sounds like my problem, thanks.

 

[Augusto]

Turned out the noise came from the fuel lines making contact with the firewall, just like you said, I installed the missing isolators and the noise is gone, thanks a lot, I appreciate your help.

 

[Zseventy-one]

Awesome!!!
Glad to hear, now I have to fix mine.