WHAT COULD THE RATTLING NOISE COMING FROM UNDER MY CAR BE FROM?

1999 Chevrolet Blazer

Tiny

kankersmit

June, 11, 2012 AT 9:10 PM

I have a 1999 Chevy Blazer that has a loud rattling sound coming from underneath the vehicle when I start it up and when it idles. It seems to make less noise when I am in motion. Any ideas?

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1 Answer

Tiny

saturntech9

June, 11, 2012 AT 10:25 PM

Possibly the cat broke loose and is rattling. You need to get under it and start smacking things around to try to duplicate the noise. Also possibly a heat shield came loose.

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