GM Service Manual Online
For 1990-2009 cars only

Air Conditioning Evaporator Tube Replacement - Outlet C69

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging.
  2. Remove the engine cover. Refer to Engine Cover Replacement.

  3. Object Number: 556745  Size: SH
  4. Remove the auxiliary evaporator outlet tube (1) from the compressor hose (3).
  5. Remove the retaining nut form the engine.
  6. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

  7. Object Number: 556747  Size: SH
  8. Remove the auxiliary evaporator tube (1) retaining nuts (2) from the body.
  9. Remove the bolt retaining the auxiliary evaporator outlet tube to the transmission bracket.
  10. Remove the auxiliary evaporator outlet tube from the auxiliary evaporator.
  11. Remove the evaporator tube from the vehicle.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 556747  Size: SH
  1. Connect the evaporator tube (1) to the auxiliary evaporator core and tighten the hose fitting to 48 N·m (35 lb ft).
  2. Install the evaporator tube retaining nuts (2) to the engine and the body and tighten to 6 N·m (53 lb in).

  3. Object Number: 556745  Size: SH
  4. Install the bolt retaining the hose (1) to the transmission bracket and tighten to 5 N·m (44 lb in).
  5. Lower the vehicle.
  6. Install the auxiliary evaporator outlet tube to the compressor hose and tighten the fitting to 48 N·m (35 lb ft).
  7. Install the engine cover. Refer to Engine Cover Replacement.
  8. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
  9. Leak test the fittings of the components using the J 39400-A .