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. Remove the rear transmission Mount. Refer to Transmission Rear Mount Replacement
  4. Disconnect the coolant heater cord from the coolant heater.

  5. Object Number: 1837206  Size: SH
  6. 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. Install the rear transmission Mount. Refer to Transmission Rear Mount Replacement
  4. Lower the vehicle.

Coolant Heater Replacement 2.4L LAT

Removal Procedure


    Object Number: 798929  Size: SH
  1. Disconnect the coolant heater cord (1).

  2. Object Number: 824483  Size: SH
  3. Remove the coolant heater bolt.
  4. Remove the coolant heater.

Installation Procedure


    Object Number: 824483  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: 798929  Size: SH
  5. Connect the coolant heater cord (1).