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

  • Tiny
  • kankersmit
  • 1999 Chevrolet Blazer
  • 140,000 miles

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?

Monday, June 11th, 2012 AT 9:10 PM

1 Answer

  • Tiny
  • saturntech9
  • Expert
  • 28,386 posts

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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Monday, June 11th, 2012 AT 10:25 PM

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