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.


    Object Number: 240935  Size: SH
  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Remove the upper radiator surge tank hose clamps.
  3. Remove the upper radiator surge tank hoses (4) and (5).

  4. Object Number: 258844  Size: SH
  5. Remove the lower radiator hose assembly clamps.
  6. Remove the lower radiator and surge tank hose assembly.

Installation Procedure


    Object Number: 258844  Size: SH
  1. Install the lower radiator and surge tank hose assembly.
  2. Install the lower radiator surge tank hose assembly clamps.

  3. Object Number: 240935  Size: SH
  4. Install the upper radiator surge tank hoses (4) and (5).
  5. Install the upper radiator surge tank hose clamps.
  6. Fill the cooling system. Refer to Cooling System Draining and Filling .