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2007 G6 GT conv
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23 Posts
Hi...Hope you have success...My issue end up being the gasket between the input manifold and the heads. very difficult to track down. It took two times to my mechanic shop but they nailed it and the was 5-6 years ago. With the second gasket they even put an additive in the radiator fluid to eliminate the chemical reaction on the gasket and material which had eaten away the gasket, hence the leak. That was the second gasket when they figured that part out. The first replacement gasket did not last a year.
 
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