GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Blazer - 4WD 🢒 Engine 🢒 Engine Cooling 🢒 Coolant Heater Cord Replacement

Removal Procedure

    Object Number: 300800 Size: SH
  1. Remove the coolant heater cord bolt and the retainer.
  2. Cut the plastic ties and remove the heater cord from the wiring harness.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Disconnect the coolant heater cord electrical connector.
  5. Remove the coolant heater cord.

Installation Procedure

    Object Number: 300800 Size: SH
  1. Connect the coolant heater electrical connector.
  2. Install the coolant heater cord.
  3. Lower the vehicle.
  4. Install the coolant heater cord to the wiring harness.
  5. Install the plastic ties to retain the coolant heater cord to the wiring harness.

    6. 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.

  6. Install the coolant heater cord retainer and bolt.

    7. Tighten
    Tighten the coolant heater cord bolt to 8 N·m (71 lb in).