LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 149 (Heating, Ventilation & Air Conditioning) >> Repair Instructions >> Mode Valve Assembly Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  2. Remove the instrument panel (I/P) trim pad. Refer to Trim Pad Replacement - Instrument Panel (I/P) in Instrument Panel, Gages, and Console.
  3. Remove the bolt from the accessory wiring junction block.
  4. Disengage the junction block tabs from the passenger knee bolster. Remove the junction block from the knee bolster.
  5. Remove the booster push rod from the brake pedal.
  6. Remove the brake pedal bolt. Remove the brake pedal.
  7. Remove the brake pedal brace bolts from the I/P carrier cross car beam.
  8. Lower the body control module (BCM) away from the I/P carrier.
  9. Disconnect any ground wires, as necessary.
  10. Reposition the I/P wiring harness out of the way.
    11. Fig 1: Bracket Bolts & HVAC Module Assembly
    GM1273425Courtesy of GENERAL MOTORS CORP.
  11. Remove the bracket bolts from the HVAC module assembly lower support (1).
  12. Remove the bracket bolts from the HVAC module assembly RH support (2).
    13. Fig 2: View Of HVAC Module Assembly Upper Support Bolts
    GM1197447Courtesy of GENERAL MOTORS CORP.
  13. Remove the bracket bolts from the HVAC module upper support
  14. Remove the right and the left I/P carrier bolts.
  15. Remove the I/P carrier.
    16. Fig 3: Rearward Retaining Screws & Recirculation Housing
    GM1194938Courtesy of GENERAL MOTORS CORP.
  16. Remove the two rearward retaining screws from the recirculation housing.
    17. Fig 4: Retaining Screws & Mode Valve Assembly
    GM1194936Courtesy of GENERAL MOTORS CORP.
  17. Remove the retaining screws from the mode valve assembly.
  18. Remove the three heat stakes from the mode valve assembly using a small chisel.
  19. Remove the screws from the mode valve actuator.
  20. Remove the mode valve actuator from the HVAC module assembly.
    21. IMPORTANT: The right front edge of the mode valve assembly is under the recirculation housing.
  21. Slowly lift the rearward side of the mode valve assembly up and to the left to remove the mode valve assembly.
scientia non olet · About LEMON Manuals