GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Astro - 4WD 🢒 Engine 🢒 Engine Cooling 🢒 Engine Coolant Temperature Sensor Replacement

Removal Procedure
  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.
  3. Remove the coolant temperature sensor electrical connector from the electrical harness at the intake manifold.
  4. Remove the coolant temperature sensor electrical connector from the intake manifold bracket.

    5. Object Number: 350938 Size: SH
  5. Remove the coolant temperature sensor from the cylinder head.

Installation Procedure

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.


    Object Number: 350938 Size: SH
  1. Install the coolant temperature sensor to the cylinder head.

    2. Tighten
    Tighten the sensor to 20 N·m (15 lb ft).

  2. Snap the coolant temperature sensor electrical connector to the intake manifold bracket.
  3. Connect the coolant temperature sensor electrical connector to the wiring harness at the intake manifold.
  4. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.
  5. Fill the cooling system with coolant. Refer to Cooling System Draining and Filling .