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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Engine Mechanical - 6.6L (On-Vehicle)) >> Removal & Installation >> Draining & Refilling Cooling System >> Drain & Refill Procedure

Drain & Refill Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Park vehicle on a level surface. Slowly surge tank cap counterclockwise. Stop rotating cap and allow hissing to stop. After all hissing stops, continue turning counterclockwise in order to remove cap.
    2. NOTE: When adding coolant, use DEX-COOL® coolant. If silicated coolant is added to system, premature engine, heater core or radiator corrosion may result. In addition, engine coolant will require change sooner at 30,000 miles (50,000 km) or 24 months.
  2. Open radiator drain cock. Allow system to drain completely. Inspect engine coolant for discoloration. If coolant is discolored, flush cooling system. If coolant is normal in appearance, continue with next step.
  3. Close radiator drain cock. Fill system through surge tank. Pre-mix a 50-60 percent solution of DEX-COOL® and clean, drinkable water. Slowly add pre-mixed solution to surge tank until level is slightly above surge tank split line. Start and operate engine for one minute.
  4. Loosely install surge tank cap. Do not allow system to build-up pressure. Cycle engine from idle to 3000 RPM in 30 second interval until engine coolant reaches 210°F (99°C) and thermostat opens. Turn off engine. Start and operate engine for one minute. Fill surge tank to 1/2" above COLD FULL mark.
  5. Install radiator surge tank cap. Cycle RPM. Idle engine to 3000 in 30-second intervals until engine coolant reaches 210°F (99°C). Turn off engine. Top off coolant, as necessary, to 1/2" above FULL COLD mark. Rinse away any excess coolant from engine and compartment. Inspect concentration of coolant.
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