Sounds Like Morse Code Under My Dash!

kdog55 · January 5, 2009

In my '05 2500 EC 6L 4x4, I have just noticed some kind of clicking/tapping noise coming from the middle of the dash. Sounds almost electrical/computer related. As stated in the title, it sounds like a morse code of dots and dashes. It only does it when the truck is running, or the key in the "run" position.

As of now there is no signs of any breakdown and it has been doing this for about 2 months now(that I noticed).

Anyone else have this? What could it be and what do I need to worry about?

Thanks.

Zembonez · January 5, 2009

What could it be and what do I need to worry about?
Thanks.

Do you have auto AC controls?

kdog55 · January 5, 2009

No, manual AC controls.

hd01chevy · January 5, 2009

i had that same noise in my 03 Yukon GM dealer thought it was the 6dsc cd player so they changed it but that didnt fix he problem. forget what it was exactly ill check and get back with ya on it.

builderpaul · January 5, 2009

In my '05 2500 EC 6L 4x4, I have just noticed some kind of clicking/tapping noise coming from the middle of the dash. Sounds almost electrical/computer related. As stated in the title, it sounds like a morse code of dots and dashes. It only does it when the truck is running, or the key in the "run" position.
As of now there is no signs of any breakdown and it has been doing this for about 2 months now(that I noticed).

Anyone else have this? What could it be and what do I need to worry about?

Thanks.

I have the same sound on my 04. It has something to do with the temp control. On mine if I don't have the passenger side heat at max I don't have the sound. May be a vent position motor?