GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.


    Object Number: 1864635  Size: SH
  1. Drain the coolant to a level below the engine coolant temperature (ECT) sensor. Refer to Cooling System Draining and Filling .
  2. Disconnect the engine wiring harness electrical connector(s) (1) from the appropriate ECT sensor (s).

  3. Object Number: 1864636  Size: SH
  4. Remove the appropriate ECT sensor(s) (1).

Installation Procedure

Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.


    Object Number: 1864636  Size: SH
  1. If installing the old sensor(s), coat the threads with sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the appropriate ECT sensor(s) (1).
  4. Tighten
    Tighten the sensor(s) to 20 N·m (15 lb ft).


    Object Number: 1864635  Size: SH
  5. Connect the engine wiring harness electrical connector(s) (1) to the appropriate ECT sensor(s).
  6. Fill the cooling system, if necessary. Refer to Cooling System Draining and Filling .
  7. Install the generator . Refer to Generator Replacement .