low oil pressure-'97 SLS

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Northstar Engines and System Technical Discussion Discussion, low oil pressure-'97 SLS in Cadillac Engine Discussion; I've got a fairly low mileage (88k) Seville that has the oil press lamp blinking at hot idle. Give it ...
  1. #1
    Harry Yarnell is online now Cadillac Owners Enthusiast
    Automobile(s): 2005 XLR, '96 eldo,'95 eldo,' 89 eldo,'78 eldo,'11CTS-V
    Join Date
    Dec 2004
    perryman, MD

    low oil pressure-'97 SLS

    I've got a fairly low mileage (88k) Seville that has the oil press lamp blinking at hot idle. Give it some rpm's (~1,000) and it goes out. No noises are apparent.
    The other day as I was pulling in my driveway, the STOP ENGINE message came up, as was the oil lamp lit. Again, no odd noises and the oil is full.
    I'm suspecting a bad sender. I could put a gauge on it, but it's buried behing the front motor mount.
    The question I ask is; is there any history of these senders going bad and/or the oil pump being problematic?
    The Seville doesn't have an oil pressure gauge on the DIC.
    Sure hope it isn't a bearing.

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Jun 2004
    Woodstock Ill.

    Re: low oil pressure-'97 SLS

    Oil pumps are VERY reliable. Your problem is somewhat common and is almost always the oil pressure switch. Be sure to replace it with an A/C Delco switch.

  4. #3
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    Re: low oil pressure-'97 SLS

    Look at the blown open oil pressure switch in my albums.

    If you want absolute, concrete, unambiguous peace of mind on cruise/idling oil pressure, go through the drill of removing the oil pressure sender, screw in a test gauge and drive the car until hot - not for 5 miles - 35 miles; record your pressures under all conditions. Now install a new pressure switch.

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