GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 XLR 🢒 Engine 🢒 Engine Cooling 🢒 Coolant Heater Cord Replacement

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

    2. Object Number: 1237924 Size: SH
  2. Disconnect the engine coolant heater cord from the engine coolant heater (1).
  3. Lower the vehicle.
  4. Disconnect the coolant heater cord clips (2) from the wiring harness conduit.
  5. Remove the engine coolant heater cord.

Installation Procedure
  1. Position the coolant heater power supply cord to the engine.
  2. Route the coolant heater cord along the engine wiring harness conduit.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

    4. Object Number: 1237924 Size: SH
  4. Connect the coolant heater power cord to the heater.
  5. Secure the coolant heater cord clip to the coolant cord.
  6. Lower the vehicle.
  7. Secure the coolant heater cord clips (2) to the engine wiring harness conduit.

    8. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 581687 Size: SH
  8. Install the engine coolant heater cord to the engine coolant heater (1).
  9. Position the engine coolant heater cord clip and install the bolt.

    10. Tighten
    Tighten the engine coolant heater cord clip bolt to 32 N·m (24 lb ft).


    Object Number: 673600 Size: SH

    Important: The engine coolant heater cord must not contact the engine, pipes, manifold or any moving parts. Always keep the electrical cord neatly rolled up with the plug end of the cord tucked into the center of the coil and secured in place with the supplied tie straps.

  10. Route the engine coolant heater cord over the generator.
  11. Coil the engine coolant heater cord into a bundle and secure the bundle to the secondary air injection hose pump with the strap.