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Why am I bottoming out in the rear?

Tiny
MARKVELLUTATO
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 122,000 MILES
When I go over speed bumps in parking lots, go up/down any incline like a driveway, or hit a sizeable bump, I am bottoming out in the rear. I just had a suspension test done and the mechanic said that my rear shocks seemed fine. If someone is in my back seat, it is much worse. Lots of scraping when I go over any kind of bump. What could be my problem if it isn't shocks? Is it possible it is the shocks and the mechanic just didn't know what he was doing? Do I have regular shocks in my Deville or are they air shocks?
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Monday, October 31st, 2011 AT 10:33 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
They are either air or electronic shocks. Yur air system may have a leak or the compressor doesen't load the shocks with air. You'll have to check to see if the compressor is working or not.
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Tuesday, November 1st, 2011 AT 12:08 AM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
The height sensor is behind the r/r tire area. It hooks to the axle if you pop the linkage loose and push it up your system will fill up. Use soapy water to spray the shocks down to see if their leaking. Ussally the bags devolop leaks and they need replacing. Do you see the level ride light cycling on and off?
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Tuesday, November 1st, 2011 AT 1:22 AM

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