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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 276 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - HYBRID (LZ1) - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSFUEL INJECTION FUEL RAIL ASSEMBLY REPLACEMENTREMOVAL PROCEDURE
2009 Chevrolet Tahoe Base, 4.8 C

Removal Procedure

2009 Chevrolet Tahoe Base, 4.8 CSECTION Removal Procedure
WARNING: This page is about a different car, the 2010 GMC Yukon, 2010 Chevrolet Tahoe, and 2010 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: An 8-digit identification number is located on the fuel rail. Refer to this identification number when servicing or when part replacement is required.
    Fig 1: View Of Engine Wiring Harness Bracket & Nut
    GM1964659Courtesy of GENERAL MOTORS CORP.
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief (Without CH 48027) .
  3. Remove the engine wiring harness bracket nut (1).
    4. Fig 2: View Of Engine Wiring Harness Electrical Connectors, EVAP Purge Solenoid & MAP Sensor
    GM1960247Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the engine wiring harness electrical connector (2) from the evaporative emission (EVAP) purge solenoid (3).
  5. Disconnect the engine wiring harness electrical connector (1) from the manifold absolute pressure (MAP) sensor (4).
    6. Fig 3: View Of Engine Wiring Harness Electrical Connectors & CPA Retainer
    GM1964662Courtesy of GENERAL MOTORS CORP.
  6. Remove the connector position assurance (CPA) retainer (2).
  7. Disconnect the engine wiring harness electrical connector (1) from the ignition coil main electrical connector.
  8. Disconnect the engine wiring harness electrical connectors (3) from the fuel injectors, perform the following:
    1. Mark the connectors to their corresponding injectors to ensure correct reassembly.
    2. Pull the CPA retainer on the connector up 1 click.
    3. Push the tab on the connector in.
    4. Disconnect the fuel injector electrical connector.
  9. Remove the engine wiring harness clip (4) from the ignition coil bracket stud.
    10. Fig 4: View Of Engine Wiring Harness Electrical Connectors & Clip
    GM1960882Courtesy of GENERAL MOTORS CORP.
  10. Remove the CPA retainer.
  11. Disconnect the engine wiring harness electrical connector (1) from the ignition coil main electrical connector.
  12. Disconnect the engine wiring harness electrical connector (2) from the electronic throttle control.
  13. Disconnect the engine wiring harness electrical connectors (5) from the fuel injectors, perform the following:
    1. Mark the connectors to their corresponding injectors to ensure correct reassembly.
    2. Pull the CPA retainer on the connector up 1 click.
    3. Push the tab on the connector in.
    4. Disconnect the fuel injector electrical connector.
  14. Remove the engine wiring harness clip (4) from the ignition coil bracket stud.
    15. Fig 5: View Of Heater Hose Bracket & Nut
    GM1964664Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.