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What tool do you use to unscrew the radiator in a 2001 GMC if you want to flush the radiator?

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βˆ™ 2005-08-11 00:55:01

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I believe ther is a petcock that can be opened with a 1/4" drive extension. You turn it about 1/3 of a turn and pull it out.

2005-08-11 00:55:01
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