Installation Procedure

Fig 1: Locating Fuel Injector ID Number

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: When ordering new fuel injectors, you must order the correct injector for the application being serviced.

The fuel injector (1) is stamped with a identification part number (2). A four-digit build date code (3) indicates the month (4), day (5), year (6), and shift (7) that built the injector.

Fig 2: View Of Fuel Injector, Clip & O-Rings

Courtesy of GENERAL MOTORS CORP.

Lubricate the NEW injector O-ring seals (2, 4) with clean engine oil.
Install the NEW injector O-ring seals onto the fuel injector.
Install a NEW retainer clip (1) onto the fuel injector.

Fig 3: Exploded View Of Fuel Rails & Injector Components

Courtesy of GENERAL MOTORS CORP.

Push the fuel injector (17) into the fuel rail injector socket with the electrical connector facing outward. The retainer clip (19) locks on to a flange on the fuel rail injector socket.
Install the fuel rail. Refer to Fuel Rail Assembly Replacement (4.8L, 5.3L, and 6.0L Engines) or Fuel Rail Assembly Replacement (5.3L (L59) Engine) .