Cooling System Bleeding

2004 Oldsmobile Bravada AWDSECTION Cooling System Bleeding
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: DO NOT remove radiator cap when radiator is warm. Removing cap immediately lowers boiling point of coolant and could cause a violent overflow, resulting in large coolant loss and personal injury.

Fill cooling system through surge tank opening. Use a pre-mix of 50/50 DEX-COOL® engine coolant and water. Add solution until level is slightly above surge tank split line. Start engine and idle for one minute. Loosely install surge tank cap. DO NOT allow engine to build up pressure. Cycle engine RPM from idle to 3000 RPM in 30 second intervals until coolant reaches 210°F (99°C) and thermostat opens. Shut engine off. Carefully remove surge cap. Start engine and idle for about one minute. Fill surge tank to 1/2" above COLD FULL mark on surge tank. Install cap on surge tank. Again, cycle engine RPM between idle and 3000 RPM in 30 second intervals. Shut engine off and check coolant level once again. Wash away any excess coolant from engine compartment.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.