Quote:
Originally Posted by fmoeller  There is a fix for the KNOCKING sound. Cadillac has a TSB out on this. They replaced my EVAP Canister Part Number 15941577 under warranty. |
BINGO.
I don't know how much quieter the new parts is, but that is exactly what the knocking sound is in this case. I hear it in many different models every day. I frequently take short roadtests and hear this before I come to a complete stop. It is the evap vent turning on and off in a self test.