GM Service Manual Online
For 1990-2009 cars only

Important: Do NOT add any engine coolant supplement sealant pellets to the cooling system.

  1. Park the vehicle on a level surface.
  2. Remove and clean (flush) the coolant recovery reservoir. Refer to Coolant Recovery Reservoir Replacement .
  3. Flush the engine cooling system. Follow the flushing equipment manufacturer's instructions.
  4. Install the coolant recovery reservoir. Refer to Coolant Recovery Reservoir Replacement .
  5. Fill the cooling system. Refer to Cooling System Draining and Filling .