Question about 1999 Chevrolet Silverado 1500

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Oil Pressue Switch

Location of oil pressure switch on a 1999 4.8 chevtolet truck

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  • mjpottinger Jan 12, 2009

    Thank You, It was exactly were you said it was. What a great help. Mike.

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  • 1,450 Answers

IT IS at back of engine behind intake. in the valley right were tranny bolts up. if you have a thin wall oil sender socket you can get it out with a extension.

Posted on Jan 09, 2009

  • TripleTauto
    TripleTauto Jan 12, 2009

    thanks for the fixya rating

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I have a bad oil leak on my 1996 Plymouth Breeze. I was told it was the oil pressure sender and needed a special socket, and was located on the block below the exhaust manifold. I was sold the socket and...


ok i believe the one you changed is the switch the one next to it is the oil pressure sending unit
there is a difference between the two///// make sure they sell you thread tape so this way you don't have any leaks//// it doesn't take a lot of thread tape on the threads


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I need to know where the oli sending unit is and how to replace it?


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Fig. 1: Location of the oil pressure switch-3.3L and 3.8L engines


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Fig. 2: Location of the oil pressure switch-3.0L engine


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Fig.: Oil pressure switch (sending unit) schematic


The low oil pressure warning lamp will illuminate when the ignition switch is turned to the ON position without the engine running. The lamp also illuminates if the engine oil pressure drops below a safe oil pressure level. To test the system, perform the following:

  1. Turn the ignition switch to the ON position.
  2. If the lamp does not light, check for a broken or disconnected wire around the engine and oil pressure sending unit switch.
  3. If the wire at the connector checks out OK, pull the connector loose from the switch and, with a jumper wire, ground the connector to the engine.
  4. With the ignition switch turned to the ON position, check the warning lamp. If the lamp still fails to light, check for a burned out lamp or disconnected socket in the instrument cluster.

REMOVAL & INSTALLATION
On the 2.4L engine, the oil pressure switch is located on the side of the engine block facing the firewall. On the 3.0L engine, the oil pressure switch is located on the oil filter adapter housing, next to the starter motor. On the 3.3L and 3.8L engines, the oil pressure switch is located next to the oil filter.
  1. Locate the oil pressure sending unit on the engine.
  2. Disconnect the negative battery cable.
  3. Disconnect the pressure switch electrical harness.
  4. Using a pressure switch socket, deep-well socket or wrench, loosen and remove the pressure switch from the engine.
To install:
  1. Install the pressure switch into the engine and tighten securely.
  2. Attach the electrical connector to the switch.
  3. Connect the negative battery cable.
  4. Start the engine, allow it to reach operating temperature and check for leaks.
  5. Check for proper oil pressure switch operation.

Hope this helps (remember to rate this answerr).



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Oil pressure switch location on 1999 chev cavalier


The oil pressure switch relays the oil pressure in the engine to the instrument cluster. The switch will illuminate the OIL PRESSURE light if the oil pressure drops below 2psi (13 pa). The switch is usually located on the side of the engine, under the intake manifold on the 2.2L engine and on the side of the intake camshaft housing on the 2.3L/2.4L engine.


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Fig. 1: The oil pressure switch is located on the engine block under the intake manifold and is accessible from underneath the vehicle-2.2L engine

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Fig. 2: Oil pressure switch location-2.3L/2.4L engine


Other, the low oil level switch activates the OIL light in the instrument cluster when the oil level in the pan goes below a certain level. The switch is mounted on the oil pan.


Hope this helped (remember rated this post).

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It may be a coincidence but try replacing the oil pressure-sending unit if it does not change try changing back to the original oil

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check oil pressue . sound like oil pump . if oil pump is good .your oil distribution passages is stop up with sludge.

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