Repair Instructions: Flushing: Notes

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Important: If the engine is damaged internally and a new engine assembly is installed in the vehicle, make sure all foreign material is completely flushed out of the cooling system. The oil cooler system should also be flushed out, if equipped. Failure to rid the oil or cooling system of debris can result in damage to the replacement engine.

Important: Remove the thermostat before flushing the cooling system. Refer to Thermostat Replacement (4.3L) or Thermostat Replacement (5.0L and 5.7L) or Thermostat Replacement (6.5L) or Thermostat Replacement (8.1L) .

You can use various methods and equipment to flush the cooling system. If special equipment is used, such as a back flusher, follow the manufacturer's instructions. However, always remove the thermostat before flushing the system.