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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 641 (Engine Cooling System) >> Repair Instructions >> Draining and Filling Cooling System >> Filling Procedure

Filling Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Do not add cold water to the cooling system with the engine at or above operating temperature. Adding cold water causes rapid cooling, resulting in possible engine damage.
CAUTION: When adding coolant, it is important that you use GM Goodwrench DEX-COOL® or HAVOLINE® DEX-COOL® coolant. If Coolant other than DEX-COOL® or HAVOLINE® DEX-COOL® is added to the system the engine coolant will require change sooner; at 50 000 km (30,000 mi) or 24 months.
CAUTION: Do not use a solution stronger than 70 percent antifreeze. Pure antifreeze can freeze at -22°C (-8°F).
CAUTION: DO NOT use cooling system seal tabs, or similar compounds, unless otherwise instructed. The use of cooling system seal tabs, or similar compounds, may restrict coolant flow through the passages of the cooling system or the engine components. Restricted coolant flow may cause engine overheating and/or damage to the cooling system or the engine components/assembly.
  1. Refill the cooling system. In order to ensure sufficient engine cooling, freezing and corrosion protection, maintain the protection level at -37°C (-34°F) or lower.
  2. Start the engine.
  3. Place the heater and A/C control in any A/C mode except Max and the temperature in the highest setting.
  4. Allow the engine to continue idling until the lower radiator to water pump hose is hot.
  5. Turn OFF the engine.
  6. Allow the engine to cool to outside temperature. Ensure the coolant level in the surge tank is at the proper level (1).
    Fig 1: Identifying Coolant Level In Surge Tank
    G01817459Courtesy of GENERAL MOTORS CORP.