GM Service Manual Online
For 1990-2009 cars only

Tools Required

J-38125 Terminal Repair Kit

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the heater coolant heater. Refer to Heater Coolant Heater Replacement .
  3. Remove the heater coolant heater control module (4). Refer to Heater Coolant Heater Control Replacement .

  4. Object Number: 1658873  Size: SH
  5. Remove the heater coolant heater blower cover retaining screws (2).
  6. Remove the heater coolant heater blower cover (3).
  7. Remove the heater coolant heater combustion cover retaining screws (1).
  8. Remove the heater coolant heater combustion cover.
  9. Remove the heater coolant heater temperature sensor retaining screw.
  10. Remove the heater coolant heater temperature sensor retaining bracket.
  11. Important: Remove and discard the O-ring on the temperature sensors.

  12. Remove the heater coolant heater temperature sensors.
  13. Important: Note the routing of the wiring to ensure proper installation.

  14. Using J-38125-560 remove the heater coolant heater temperature sensors wiring from the electrical connector.

Installation Procedure


    Object Number: 1658873  Size: SH
  1. Install the heater coolant heater temperature sensors wiring to the electrical connector.
  2. Install the heater coolant heater temperature sensors with new O-rings.
  3. Install the heater coolant heater temperature sensor retaining bracket.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the heater coolant heater temperature sensor retaining screw (5).
  6. Tighten
    Tighten the screw to 1.5 N·m (13 lb in).

  7. Install the heater coolant heater combustion cover.
  8. Install the heater coolant heater combustion cover retaining screws (1).
  9. Tighten
    Tighten the screw to 6 N·m (53 lb in).

  10. Install the heater coolant heater blower cover (3).
  11. Install the heater coolant heater blower cover retaining screws (2).
  12. Tighten
    Tighten the screw to 6 N·m (53 lb in).

  13. Install the heater coolant heater control module (4). Refer to Heater Coolant Heater Control Replacement .
  14. Install the heater coolant heater. Refer to Heater Coolant Heater Replacement .
  15. Lower the vehicle.