GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 38185 Hose Clamp Pliers

Removal Procedure

  1. Partially drain the cooling system. Refer to Cooling System Draining and Filling.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  3. Remove the heater coolant heater muffler. Refer to Heater Coolant Heater Exhaust Muffler Replacement.
  4. Disconnect the heater coolant heater electrical connectors.
  5. Disconnect the fuel supply hose to the heater coolant heater. Refer to Plastic Collar Quick Connect Fitting Service.

  6. Object Number: 1654279  Size: SH
  7. Reposition the heater hose clamps at the heater coolant heater using J 38185 .
  8. Remove the heater hoses from the heater coolant heater.

  9. Object Number: 1658085  Size: SH
  10. Remove the air supply hose from the heater coolant heater.

  11. Object Number: 1658078  Size: SH
  12. Remove the heater coolant heater retaining bolt.

  13. Object Number: 1658080  Size: SH
  14. Remove the heater coolant heater from the bracket.

Installation Procedure


    Object Number: 1658080  Size: SH
  1. Install the heater coolant heater to the bracket.
  2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1658078  Size: SH
  3. Install the heater coolant heater retaining bolt and tighten to 6 N·m (53 lb in).

  4. Object Number: 1658085  Size: SH
  5. Install the air supply hose to the heater coolant heater.

  6. Object Number: 1654279  Size: SH
  7. Install the heater hoses to the heater coolant heater.
  8. Reposition the heater hose clamps at the heater coolant heater using J 38185 .
  9. Connect the fuel supply hose to the heater coolant heater. Refer to Plastic Collar Quick Connect Fitting Service.
  10. Connect the heater coolant heater electrical connectors.
  11. Install the heater coolant heater muffler. Refer to Heater Coolant Heater Exhaust Muffler Replacement.
  12. Lower the vehicle.
  13. Fill the cooling system. Refer to Cooling System Draining and Filling.