GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure

  1. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
  2. Remove the left wiper arm linkage nuts.
  3. Reposition the left wiper arm linkage for access.

  4. Disconnect the vacuum hose from the brake booster and reposition.
  5. Remove the air cleaner cover and intake tube. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls -3.4L.
  6. Important: Disconnect the throttle and cruise control cables to prevent bending the cable housings.

  7. Disconnect the throttle and cruise control cables from the TBI mounting bracket .
  8. Remove the transmission fluid filler tube. Refer to Transmission Fluid Filler Tube Replacement in Automatic Transaxle.
  9. Disconnect both heater hose quick disconnects from the inlet and outlet pipes.

  10. Object Number: 395311  Size: SH
  11. Disconnect the outlet heater hose (3) from the outlet pipe (4).

  12. Object Number: 686678  Size: SH
  13. Reposition the heater hose clamp using the J 38185 .
  14. Disconnect the outlet heater hose from the heater core.
  15. Remove the outlet heater hose.

Installation Procedure

  1. Install the outlet heater hose.

  2. Object Number: 392563  Size: SH
  3. Connect the outlet heater hose to the heater core.
  4. Position the heater hose clamp using the J 38185 .
  5. Position the hose clamp as indicated.


    Object Number: 395311  Size: SH
  6. Connect the outlet heater hose (3) to the outlet pipe (4).
  7. Install the transmission fluid filler tube. Refer to Transmission Fluid Filler Tube Replacement in Automatic Transaxle.
  8. Connect the throttle and cruise control cables to the TBI mounting bracket.
  9. Install the air cleaner cover and intake tube. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls -3.4L.
  10. Connect the vacuum hose to the brake booster .
  11. Install the left wiper arm linkage.
  12. Install the left wiper arm linkage nuts.
  13. Tighten
    Tighten the nuts to 5 N·m (44 lb in).

  14. Refill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.