GM Full Size Vans 1987-1997 Repair Guide

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



The sensor can be found at these different locations as follows:

1987-93 models:



4.3L, 5.0L and 5.7L engines: in the at the left front side of the distributor
 
7.4L engines: at the front left side of the block
 
Diesel engines: left side above the flywheel housing
 

1994-97 models:



Gasoline engines: at the top rear of the engine block
 
Diesel engines: under the intake manifold on the driver's side of the block
 

Except 1996-97 Diesel Engines

See Figure 1



Click image to see an enlarged view

Fig. Fig. 1: Removing the oil pressure sensor - 1994-97 models

  1. Disconnect the negative battery cable and drain the engine oil.
  2.  
  3. Remove the engine cover.
  4.  
  5. Disconnect the sensor electrical lead and unscrew the sensor.
  6.  

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

1996-97 Diesel Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine cover.
  4.  
  5. Remove the air cleaner assembly.
  6.  
  7. If equipped with a turbocharger, remove the turbocharger intake cover and cover the intake opening to prevent dirt entering the turbocharger.
  8.  
  9. Disengage the sender electrical connection and remove the sender from the engine block.
  10.  

A 11/16in. crow&rsquos foot wrench is required to remove the sender from the block.

To install:
  1. Install the sender in the block and engage the electrical connection.
  2.  
  3. If equipped with a turbocharger, remove the cover placed over the intake opening.
  4.  
  5. Install the turbocharger intake cover.
  6.  
  7. Install the air cleaner assembly.
  8.  
  9. Install the engine cover and connect the negative battery cable.
  10.  

 
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