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The Intrique, along with every other GM car made, are known to get clogged cooling systems. The DEX Cool coolant they use is one of the worst ideas out there. USually ranning a bottle of coolant flush, driving it, then flushing it out, then another bottle of flush, then driving it, then flushing it out, then another bottle of coolant flush, then refilling with standard green coolant, and installing a inline coolant filter, to get any more dexcool coolant particles. ----------------

In my professional opinion, Dexcool accelerates oxidation of parts, but does not directly cause clogging. A flush might not be a bad idea anyway. I'd recommend that universal yellow long-life instead of the green. --

1. Remember when flushing to make sure the front of the condenser and/or radiator is not plugged with seeds, dirt, etc. You can clean this with a normal water hose. DO NOT use a pressure washer as this will bend the fins.

2. Verify that as the car is getting warm (on its way to hot) that the fans are working. If the fans are not working, check the coolant temp sensor before the fans themselves. Check fuses and relays.

3. Replace the coolant pressure cap. If it's not holding pressure, the system will overheat.

Overheating is rarely a "plugged" issue on modern cars.

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Q: 2000 Oldsmobile Intrigue still overheating after thermostat and water pump replaced. Car passes all head gasket tests no hydocarbons detected in the cooling system etc?
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