GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Express 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 Heater Coolant Heater Inlet Hose Replacement

Special Tools

J 38185 Hose Clamp Pliers

Removal Procedure
  1. Remove the engine cover. Refer to Engine Cover Replacement.
  2. Partially drain the cooling system. Refer to Cooling System Draining and Filling.
  3. Remove the air cleaner. Refer to Air Cleaner Assembly Replacement for the 4.3L engine, or Air Cleaner Assembly Replacement for the 4.8L, 5.3L, 6.0L, 6.2L and 7.0L engine, or Air Cleaner Assembly Replacement for the 6.6L engine.
  4. Remove the upper fan shroud. Refer to Engine Coolant Fan Upper Shroud Replacement.

    5. Object Number: 1654273 Size: SH
  5. Reposition the heater hose clamp at the heater pipe assembly using J 38185 .
  6. Remove the heater hose from the heater pipe assembly near the front of the engine.

    7. Object Number: 1654275 Size: SH
  7. Remove the heater pipe to the engine retaining nut.

    8. Object Number: 1654272 Size: SH
  8. Reposition the heater hose clamp at the heater pipe assembly using J 38185 .
  9. Remove the heater hose from the heater pipe assembly near the rear of the engine.

    10. Object Number: 1654277 Size: SH
  10. Remove the heater pipe to transmission housing retaining nuts.

    11. Object Number: 1654279 Size: SH
  11. Reposition the heater pipe hoses to the fuel operated heater clamps using J 38185 .
  12. Remove the heater pipe hoses from the fuel operated heater.

    13. Note: Note the routing of the hose assembly to ensure proper installation.

  13. Remove the heater pipe hose assembly from the vehicle.

Installation Procedure

    Object Number: 1654279 Size: SH
  1. Install the heater pipe hose assembly to the vehicle.
  2. Install the heater pipe hoses to the fuel operated heater.
  3. Reposition the heater pipe hoses to the fuel operated heater clamps using J 38185 .

    4. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1654277 Size: SH
  4. Install the heater pipe to transmission housing retaining nuts and tighten to 25 N·m (18 lb ft).

    5. Object Number: 1654272 Size: SH
  5. Install the heater hose to the heater pipe assembly near the rear of the engine.
  6. Reposition the heater hose clamp at the heater pipe assembly using J 38185 .

    7. Object Number: 1654275 Size: SH
  7. Install the heater pipe to the engine retaining nut and tighten to 8 N·m (71 lb in).

    8. Object Number: 1654273 Size: SH
  8. Install the heater hose to the heater pipe assembly near the front of the engine.
  9. Reposition the heater hose clamp at the heater pipe assembly using J 38185 .
  10. Install the upper fan shroud. Refer to Engine Coolant Fan Upper Shroud Replacement.
  11. Install the air cleaner. Refer to Air Cleaner Assembly Replacement for the 4.3L engine, or Air Cleaner Assembly Replacement for the 4.8L, 5.3L, 6.0L, 6.2L and 7.0L engine, or Air Cleaner Assembly Replacement for the 6.6L engine.
  12. Fill the cooling system. Refer to Cooling System Draining and Filling.
  13. Install the engine cover. Refer to Engine Cover Replacement.