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Originally Posted by mack1a  I know I have seen something on the following somewhere in this forum but I can't find it. I probably am too impatient to wait for a search on this site.Twice when I have stopped at an intersection about 1 mile from my house I have heard a knocking sound that sounds like someone is in the trunk. It happens 5 or 6 times then disappears.Again, I know I have seen this on the forum but can't find it. I believe it was something to do with the fuel system. I would appreciate someone refreshing my memory on this if possible. |
I have had the exact same experience three times. The knock is so distinctive and clear that my wife insisted we stop the car and open the trunk because she was concerned that someone was in it and trying to get out. Of course, the trunk was empty. It has happened each time as we stopped at a light near our home as we were just leaving to go somewhere. When I called the Caddie dealer the rep said to bring it in but warned me that if they could not replicate the knock they could not fix it. So, I have not gone in because it has only happened three times in the course of a year.