GM Service Manual Online
For 1990-2009 cars only

Coolant Heater Cord Replacement 3.8L

Removal Procedure


    Object Number: 179498  Size: SH
  1. Remove the coolant heater cord retainer from the upper radiator support.
  2. Cut the coolant heater cord straps at the engine wiring harness.
  3. Disconnect the coolant heater cord from the coolant heater.
  4. Remove the coolant heater cord from the vehicle.

Installation Procedure


    Object Number: 179498  Size: SH

    Notice: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.

  1. Install the coolant heater cord to the vehicle.
  2. Connect the coolant heater cord to the coolant heater.
  3. Install a new coolant heater cord straps at the engine wiring harness.
  4. Install the coolant heater cord retainer to the upper radiator support.

Coolant Heater Cord Replacement LY7

Removal Procedure

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

  2. Object Number: 785737  Size: SH
  3. Disconnect the coolant heater power supply cord from the coolant heater (1).
  4. Disconnect the coolant heater cord clip (2) from the coolant heater cord.
  5. Lower the vehicle.
  6. Disconnect the coolant heater cord clips (3, 4) from the following:
  7. • The engine wiring harness conduit
    • The engine oil level indicator tube
  8. Remove the coolant heater cord from the vehicle.

Installation Procedure


    Object Number: 785737  Size: SH
  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. Connect the coolant heater cord to the coolant heater (1).
  5. Secure the coolant heater cord clip (2) to the coolant heater cord.
  6. Lower the vehicle.
  7. Secure the coolant heater cord clips (3, 4) to the following:
  8. • The engine wiring harness conduit
    • The engine oil level indicator tube

Coolant Heater Cord Replacement LS4

Removal Procedure


    Object Number: 1575131  Size: SH
  1. Cut the tie strap attaching the coolant heater cord to the diagonal brace.

  2. Object Number: 1575129  Size: SH
  3. Cut the tie straps (1) attaching the coolant heater cord to the engine wiring harness.
  4. Disconnect the coolant heater cord connection from the coolant heater.
  5. Remove the coolant heater cord.

Installation Procedure

Notice: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.


    Object Number: 1575129  Size: SH
  1. Install the coolant heater cord.
  2. Connect the coolant heater cord connection to the coolant heater.
  3. Install NEW tie straps (1) attaching the coolant heater cord to the engine wiring harness.

  4. Object Number: 1575131  Size: SH
  5. Install a NEW tie strap attaching the coolant heater cord to the diagonal brace.