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if you are talking about the coolant drain hose there isn't one on this model.

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โˆ™ 2011-09-13 10:40:14
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Q: Where is the drain hose on a 1999 Grand Prix?
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Related Questions

How do you drain radiator in 2002 Pontiac Grand Prix Se?

If it does not have a drain plug, just simply remove the lower radiator hose.

Do you have to remove the lower hose of the radiator on the 2001 grand prix radiator to drain it?

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== ==

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where is the airconditor drain hose on a 1999 Pontiac Bonneville

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Disconnect the lower coolant hose.

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Follow the upper rad hose from the rad to the engine.

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