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Resident Guinea ***
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14,535 Posts
got a camera that takes video w/sound? upload a vid so we can hear it.

It's probably something HVAC related, maybe. I know shit ticked in OBSeses.
 

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Discussion Starter · #6 ·
Al Queda :imo:
LOL, nah........it's just like pimp SS said. it only does it sometimes but nothing is wrong. I should probably try to find the relay. think it just needs to be replaced? I'd hate to have to pull the damn dash just for that though. ugh.

thanks guys. I'll try to take a vid/audio of it next time it does it.
 

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GM Trucks & UA
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1,635 Posts
Was it ever a fleet vehicle in it's previous ownership, might be a meter in there somwhere?

Also, have you noticed it doing it when it's raining or after just being washed?
 

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haz 12"s!
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4,531 Posts
My 04 have a knocking sound from the drivers side behind the dash. Its in the HVAC system. Its not all the time but its only on the a/c setting. I think its related to the sudden change from a/c to heat via the little door thing.
 

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I had the same thing on my g'pa's tahoe......I got under the drivers side floorboard one night and put some tape on it so I know where its coming from......its a lil thing thats geared and spins around I dunno....
 

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Discussion Starter · #19 ·
I'm going to try and replace the relay under the hood to see if that fixes it. it's not the same thing if yours goes away after a few clicks. this doesn't go away until you turn the ignition off and restart it and then it's gone. pretty confident it's a relay like was mentioned earlier in my case.
 

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Must be lost..
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1,148 Posts
Could be the blend door motor, will it go away when the temp control is in the middle setting?
 
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