GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1224204  Size: SH
  1. Remove the surge tank cap after the engine cools.
  2. Check the coolant level.
  3. Install a suitable cooling system pressure tester (1) to the surge tank filler neck using the adapter (2) and pressurize 110-120 kPa (16.0-17.4 psi).
  4. Inspect the coolant leaks on the hoses and connections during 2 minutes.
  5. If the leak is inspected, replace the parts or repair the connections.