Installation Procedure

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Fig 1: View Of Wiring Harness O-Ring Seal Surface (5.3L (L59) Engine)

Courtesy of GENERAL MOTORS CORP.

Using spray cleaner GM P/N 12377981 (Canadian P/N 10953463) or equivalent, clean the wiring harness O-ring seal surface of the fuel sender.

Fig 2: View Of Fuel Level Sender (5.3L (L59) Engine)

Courtesy of GENERAL MOTORS CORP.

Install the fuel level sender.

Fig 3: Connecting Fuel Level Sensor Electrical Connector (5.3L (L59) Engine)

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: To prevent damage to the level sensor wiring, unclip the fuel return tube from the fuel sender and route the level sensor wiring behind the fuel return tube. Clip the fuel return tube back into the fuel sender retaining tabs.

Connect the fuel level sensor electrical connector.
Install the sending unit. Refer to Fuel Sender Assembly Replacement (4.8L and 5.3L Engines) or Fuel Sender Assembly Replacement (5.3L (L59) Engine) or Fuel Sender Assembly Replacement (6.0L Engine - Dual Tanks - Front) or Fuel Sender Assembly Replacement (6.0L Engine - Dual Tanks - Rear) .