Question about 2001 GMC Jimmy

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Pulled every thing apart to get the heater core out and I can't figure out how to get it out. What am I doing wrong??????

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  1. Drain the engine cooling system.
  2. Remove or disconnect the following:
    • Negative battery cable
    • Heater hoses from the heater core
  3. Remove the instrument panel as follows:
    1. Disable the air bag system.
    2. Set the parking brake and block the wheels.
    3. Disconnect the parking brake release cable from the parking brake lever.
    4. Unfasten the screws that retain the DLC instrument panel left side sound insulator. Feed the DLC through the hole in the sound insulator.
    5. Unfasten the right side sound insulator panel screws and remove the panel.
    6. Unfasten the screws that attach the instrument panel left side sound insulator to the knee bolster and cowl panel.
    7. Unfasten the nut that attaches the left side sound insulator to the accelerator pedal bracket.
    8. Unplug the remote control door lock receiver module electrical connector.
    9. Remove the door lock receiver module from the left side sound insulator. Remove the left side sound insulator.
    10. Unfasten the screws that attach the instrument panel center sound insulator to the knee bolster, instrument panel, heater assembly and floor duct.
    11. Remove the center sound insulator.
    12. Unfasten the screws that attach the courtesy lamp to the knee bolster.
    13. Unfasten the screws that attach the knee bolster to the instrument panel.
    14. Disconnect the lap cooler duct from the knee bolster.
    15. Unplug the lighter electrical connection and remove the knee bolster.
    16. Unfasten the steering column-to-instrument panel nuts and lower the column.
    17. Unfasten the screws that attach the instrument panel accessory trim plate to the instrument panel.
    18. Remove the trim plate and unplug all necessary electrical connection.
    19. Remove the heater and/or air conditioning control assembly.
    20. Remove the radio and the storage compartment assembly (if equipped).
    21. If necessary, remove the instrument cluster.
    22. Unfasten the left and right instrument panel pivot bolts and the panel lower support bolt.
    23. Unfasten the speaker grilles retaining screws and remove the speaker grilles.
    24. Remove the windshield defroster grille using a flat-bladed prytool. Start at one end of the grille and work your way down the grille.
    25. Unfasten the 4 instrument panel upper support screws.
    26. Tag and unplug all necessary electrical connections.
    27. Remove the instrument panel from the vehicle.
  4. Remove or disconnect the following:
    • Air inlet assembly, if equipped
    • Vacuum hoses
    • Heater assembly studs, from inside the engine compartment
    • Blower motor resistor
    • Stud from inside the heater case assembly; the stud is located behind the blower motor resistor
    • Heater assembly-to-chassis screws
    • Heater assembly from the vehicle
    • Access cover screws and cover from the heater assembly
    • Heater core from the heater case assembly

Posted on Feb 19, 2009


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