everytime I start my car when it is cold outside I hear a rattling, it sounds like it is coming from inside the dash(maybe in the middle somewhere not sure) but I could be wrong but it goes away when it is warm, what could this be?

Thanks in advance

good question, when its cold out all GM cars start funny, mine does too.

Once i had a rattle that i couldnt figure out, it sounded like it was comming from the dash, it was pissing me off, and one day i reached down to grab my CD's off the pass side floor, and it turned out to be the little handle that allows you to move the seat back and fourth, but it made it sound like it was comming from the dash. ARRRRGGGGGGG !

IS your car a stick, my clutch is going bad and when i start it, the flywheel is very noticeably loud and annoying. When i press the clutch it goes away, let go its back. And it sounds like its comming from inside my car.

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91 Firebird .. 305 TBI .. 5 speed
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