GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Engine 🢒 Engine Cooling 🢒 Shutter Control Valve Hose Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.

    2. Refer to Battery Cable Replacement in Engine Electrical.


    Object Number: 203630 Size: SH
  2. Remove the radiator shutter control valve hoses from the shutter control valve.
  3. Place a drain pan under the radiator shutter control valve.
  4. Remove the radiator shutter control valve hoses from the engine block.
  5. Remove the radiator shutter control valve hoses from the mounting clamps.
  6. Remove the radiator shutter control valve hose from the vehicle.

Installation Procedure

    Object Number: 203630 Size: SH
  1. Install the radiator shutter control valve hoses 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 radiator shutter control valve hoses to the mounting clamps.

    3. Tighten
    Tighten the control valve hose mounting clamps to 6 N·m (53 lb in).

  3. Install the radiator shutter control valve hoses to the engine block.

    4. Tighten
    Tighten the flare nut to 14 N·m (124 lb in).

  4. Connect the negative battery cable.
  5. Refill the engine oil to the correct level. Refer to Approximate Fluid Capacities in Maintenance and Lubrication.
  6. Start the engine.
  7. Inspect the engine for oil leaks.