Chevy and GMC Duramax Diesel Forum - View Single Post

rra68 · 11-29-2006, 11:57 PM

The "thud" your talking about in your dash is most likely the a/c pump kicking on and off, it goes on with your defroster too so if you have any of that on you will hear it in the dash and feel it in the floor.

11-29-2006, 11:57 PM	eBay Motors #7 (permalink)
rra68 Junior Member Join Date: Nov 2006 Posts: 1	The "thud" your talking about in your dash is most likely the a/c pump kicking on and off, it goes on with your defroster too so if you have any of that on you will hear it in the dash and feel it in the floor.