04-19-12, 01:32 PM
I have a 2005 STS loud grind/rattle when I start my car, however, it is intermittent. It lasts only a few seconds and then goes away. I have taken it to the dealership several times and they first said it was a heat sensor loose, so they tightened that... didn't work, they replaced the cat converter.... that didn't work.... now they are saying this is a normal sound! If this is normal, then why doesn't this happen every time i start it and why don't all of the cadillac STS do it? Very frustrated! The noise is extremely loud and embarrasing especially when people are around and they hear it... driving a $55,000 dollar cadillac, you wouldn't expect to hear a "normal" noise like that!