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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1137 (Engine Controls And Fuel - 3.6L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Injector Replacement (LLT) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Relieve the high side fuel system pressure. Refer to Fuel Pressure Relief (With CH 48027 - LY7)  or Fuel Pressure Relief (Without CH 48027 - LY7)  or Fuel Pressure Relief (With High Pressure Pump - LLT) .
    2. IMPORTANT: The fuel injectors have an alignment feature, note the position of the injectors alignment for installation.
  2. Remove the fuel injection fuel rail assembly. Refer to Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LLT)  or Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LLT) .
  3. Remove and discard the fuel injector hold down clamp.
  4. Disconnect the fuel injector wiring harness electrical connectors from the fuel injectors.
    5. Fig 1: Removing/Installing Rebuilt Direct Fuel Injectors
    GM1977754Courtesy of GENERAL MOTORS CORP.
  5. Remove the direct fuel injectors (1). If necessary, use the J 2619-01  and the J-37281-A  in order to remove the direct fuel injector(s). See Special Tools .
    6. Fig 2: Identifying Fuel Injector Components
    GM1977756Courtesy of GENERAL MOTORS CORP.
  6. Remove and discard the following components from the fuel injectors (4).
    • Upper O-ring Seal (1)
    • Plastic Spacer (2)
    • Retaining Ring (3)
    • Isolator Cup (5)
    • Teflon Seal (6)
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