S&T Series Blazer, Bravada, Envoy, Jimmy, Rainier, Trailblazer, Xtreme

Oil Pressure Sender

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Operation



The oil pressure sender relays to the dash gauge the oil pressure in the engine.

Removal & Installation



  1. Disconnect the negative battery cable and drain the engine oil.
  2.  
  3. Disconnect the sensor electrical lead and unscrew the sensor.
  4.  

To install:

  1. Coat the first two or three threads with sealer. Install the sensor and tighten until snug. Attach the electrical lead.
  2.  
  3. Connect the battery cable and fill the engine with oil.
  4.  

Testing




WARNING
This test is for testing the sender only. Verify that the engine has sufficient oil pressure before conducting this test.

  1. Unplug the sender electrical connection.
  2.  
  3. Connect one lead of a ohmmeter to the sender terminal and the other lead to the sender body.
  4.  
  5. With the engine off the resistance should be approximately 1 ohm.
  6.  
  7. Start the engine. The resistance should increase as the engine speed increases.
  8.  
  9. If not, replace the sender.
  10.  

 
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