GM Service Manual Online
For 1990-2009 cars only

Coolant Heater Replacement LY7

Removal Procedure

  1. Turn the ignition OFF.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Disconnect the coolant heater cord from the coolant heater.

  4. Object Number: 1837206  Size: SH
  5. Remove the coolant heater.

Installation Procedure


    Object Number: 1837206  Size: SH
  1. Install the coolant heater.
  2. Connect the coolant heater cord to the coolant heater.
  3. Lower the vehicle.

Coolant Heater Replacement LAT

Removal Procedure


    Object Number: 1892451  Size: SH
  1. Raise and support vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Disconnect the coolant heater cord (1).

  3. Object Number: 1892492  Size: SH
  4. Remove the coolant heater bolt.
  5. Remove the coolant heater.

Installation Procedure


    Object Number: 1892492  Size: SH
  1. Install the coolant heater.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the coolant heater bolt and tighten to 10 N·m (89 lb in).

  4. Object Number: 1892451  Size: SH
  5. Connect the coolant heater cord (1).
  6. Lower the vehicle.