I have a 2005 pontiac grand prix with 144,000 miles on it. After the first freeze this year, it started making a loud tapping/ticking/slapping noise from the bottom of the engine compartment just like in this video https://www.youtube.com/watch?v=Yfw08eFUWZk
The video is of someone else's 2006 Grand Prix but it is the exact same noise and situation. It only happens when the vehicle is cold and the sound gradually fades as the vehicle warms up until it is completely gone.
The is no check engine light on or pending codes. The vehicle drives fine.
I got the oil changed shortly after the noise started but no change. I had the transmission rebuilt/replaced 3 months ago.
