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

Fuel Pump & Sender Connector

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Description & Operation



The fuel level sensor consists of a float, a wire float arm, and a ceramic resistor card. The position of the float arm indicates the fuel level. The fuel level sensor contains a variable resistor that changes resistance in correspondence with the amount of fuel in the fuel tank. The PCM sends the fuel level information via the Class II circuit to the Instrument Panel (I/P) cluster. This information is used for the I/P fuel gage and the low fuel warning indicator, if applicable. The PCM also monitors the fuel level input for various diagnostics.


CAUTION
 Fuel Vapors can collect while servicing fuel system parts in enclosed areas such as a trunk. To reduce the risk of fire and increased exposure to vapors:



Use forced air ventilation such as a fan set outside of the trunk.
 
Plug or cap any fuel system openings in order to reduce fuel vapor formation.
 
Clean up any spilled fuel immediately.
 
Avoid sparks and any source of ignition.
 
Use signs to alert others in the work area that fuel system work is in process.
 

Removal & Installation



  1. Remove the fuel sender assembly.
  2.  
  3. Disconnect the fuel pump electrical connector.
  4.  
  5. Remove the fuel level sensor electrical connector retaining clip.
  6.  
  7. Disconnect the fuel level sensor electrical connector from under the fuel sender cover.
  8.  
  9. Remove the fuel level sensor retaining clip.
  10.  
  11. Squeeze the locking tangs and remove the fuel level sensor.

    Click image to see an enlarged view

    Fig. The fuel sender assembly consists of the following major components: fuel tank pressure sensor (1); fuel line fittings (2); fuel tank fuel pump module (3); fuel strainer (4); fuel level sensor (5)

  12.  

To install:

  1. Install the fuel level sensor.
  2.  
  3. Install the fuel level sensor retaining clip.
  4.  
  5. Connect the fuel level sensor electrical connector.
  6.  
  7. Install the fuel level sensor electrical connector retaining clip.
  8.  
  9. Connect the fuel pump electrical connector.
  10.  
  11. Install the fuel sender assembly.
  12.  

 
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