Question about 2003 Cadillac Escalade

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When I start my vehicle, Mmy oil pressure gauge goes to 80 and stays there.

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Change oil pressure sending unit. This should clear your problem up. If you need assistance for removal and install I will be glad to help.

Posted on Sep 15, 2010

  • chachachea Apr 17, 2012

    I have a 2005 escalade esv my needle is at eighty. I read your post think its great just hoping for more info on how to locate the sencer.

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  • Cadillac Master
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You oil pressure is read by an oil pressure sending unit, that sends information to your gauge. If the sending unit is bad, you can get weird readings. You can either replace it, or have a mechanical gauge hooked up to see the actual pressure.

Posted on Sep 15, 2010

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2 Answers

Ticking noise from engine upon start up but eventually goes away oil pressure gauge doesn't move at all when started or shut off. Gauge stays all the way past 80! Help me please!


Since changing the oil sender made no change, dash gauge may be dead. Hook up cheap mechanical gauge to see what is really going on. Ticking when first started is probably a lifter and may not be a big problem. How many miles on engine?

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Replace the oil pressure sending unit, they are notorious for this problem.

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Another gauge needs to be connected to the car to check that oil pressure sensor or the gauge itself is not the problem.

If an independent gauge shows the same readings I would suspect a sticking oil pressure relief valve.

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There may be a loose wire or the gauge or sending unit may be going bad. The first thing I would do is to hook up a temporary oil pressure gauge, not using the old one at all. With this watch gauge while driving and see what readings you get. If the readings still jump around you have a pump that is getting weak and failing, If that is the case the pump should be replaced, but with high milage you may consider rebuilding the entire engine. If the readings stay normal start checking for a loose wire at gauge or sender. Then check sender, then gauge and replace as needed.

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