GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Blazer - 4WD - RHD 🢒 Body and Accessories 🢒 Body Front End 🢒 Coolant Recovery Reservoir Replacement

Removal Procedure
  1. Remove the PCM and set it aside. Refer to Powertrain Control Module Replacement in Engine Controls-4.3L.

    2. Important: Do not disconnect wiring harness to PCM.


    Object Number: 9972 Size: SH
  2. Disconnect the hose from the coolant recovery reservoir.

    3. Object Number: 3326 Size: SH
  3. Remove the coolant recovery reservoir retaining nuts.

    4. Object Number: 3327 Size: SH
  4. Remove the coolant recovery reservoir.
  5. Remove the coolant from the reservoir.

Installation Procedure

    Object Number: 3327 Size: SH
  1. Install the coolant recovery reservoir.

    2. Object Number: 3326 Size: SH

    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.

  2. Tighten the reservoir retaining nuts.

    3. Tighten
    Tighten the reservoir retaining nuts to 8-11 N·m (6-8 lb ft).


    Object Number: 9972 Size: SH
  3. Connect the hose to the coolant recovery reservoir.
  4. Install the PCM. Refer to Powertrain Control Module Replacement in Engine Controls-4.3L.
  5. Add coolant to reservoir. Refer to Cooling System Draining and Filling .