GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: With a pressurized cooling system, the coolant temperature in the radiator can be considerably higher than the boiling point of the solution at atmospheric pressure. Removal of the surge tank cap, while the cooling system is hot and under high pressure, causes the solution to boil instantaneously with explosive force. This will cause the solution to spew out over the engine, the fenders, and the person removing the cap. Serious bodily injury may result.

    Notice: When adding coolant, use DEX-COOL® coolant. If silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner-at 50 000 km (30,000 mi) or 24 months.

  1. Partially drain the cooling system. Refer to Cooling System Draining and Filling .

  2. Object Number: 289176  Size: SH
  3. Remove the surge tank outlet hose clamp from the surge tank.
  4. Remove the surge tank outlet hose from the surge tank.

  5. Object Number: 289178  Size: SH
  6. Remove the surge tank outlet hose clamp from the thermostat housing.
  7. Remove the surge tank outlet hose from the thermostat housing.

Installation Procedure


    Object Number: 289178  Size: SH
  1. Install the surge tank outlet hose to the thermostat housing.
  2. Install the surge tank outlet hose clamp to the thermostat housing.

  3. Object Number: 289176  Size: SH
  4. Install the surge tank outlet hose to the surge tank.
  5. Install the surge tank outlet hose clamp to the surge tank.
  6. Fill the cooling system. Refer to Cooling System Draining and Filling .
  7. Inspect for leaks.