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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1451 (Engine Cooling System) >> Repair Instructions >> Draining and Filling Cooling System (LM4) >> Coolant Filling Procedure

Coolant Filling Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The procedure below must be followed. Improper coolant level could result in a low or high coolant level condition, causing engine damage.
  1. If a complete block drain was required, install the coolant heater or plug. Refer to Coolant Heater Replacement (LL8)  or Coolant Heater Replacement (LM4) .
  2. Install the lower radiator hose.
  3. Using the J 38185  slide the clamp into the original position.
  4. Lower the vehicle.
    5. IMPORTANT: Slowly add a mixture of 50/50 DEX-COOL antifreeze and deionized water to the cooling system through the top of the radiator until full. Refer to Capacities - Approximate Fluid in General Information.
  5. Install the radiator cap.
  6. Remove coolant recovery reservoir cap.
  7. Slowly add a mixture of 50/50 DEX-COOL antifreeze and deionized water to the cooling system through the coolant recovery reservoir. Refer to Capacities - Approximate Fluid in General Information.
  8. Fill the coolant recovery reservoir with the remaining coolant.
  9. Install coolant recovery reservoir cap.
  10. Install the coolant air bleed hose to the throttle body.
  11. Using J 38185  slide the coolant air bleed hose clamp back to the original position.
  12. Start the engine.
  13. Run the engine from 1,000-3,000 RPM in 30-second intervals until the engine reaches normal operating temperature.
  14. Allow the engine to idle for 3 minutes before repeating the last step.
  15. Shut the engine OFF.
  16. Allow the engine to cool.
  17. Top off the coolant recovery reservoir as necessary.
  18. Rinse away any excess coolant from the engine and the engine compartment.
  19. Inspect the cooling system for leaks.
  20. Inspect the concentration of the engine coolant using J 26568  . See Special Tools and Equipment .
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