GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Express 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Coolant Control Valve Replacement - Auxiliary

Removal Procedure
  1. Drain the coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    3. Object Number: 301724 Size: SH
  3. Remove the front hose connections from the bypass valve.
  4. Remove the rear hose connections from the bypass valve.
  5. Remove the nut from the by-pass valve.
  6. Remove the by-pass valve from the vehicle.

Installation Procedure

    Object Number: 301724 Size: SH
  1. Install the by-pass valve to the vehicle.

    2. 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. Install the retaining nut to the coolant by-pass valve.

    3. Tighten
    Tighten the retaining nut to 5 N·m (44 lb in).

  3. Install the rear hose connections to the bypass valve.
  4. Install the front hose connections to the bypass valve.
  5. Lower the vehicle.
  6. Fill the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.