weirdnolive
weirdnolive
05-22-2009, 06:30 PM
looking for other people who have a 6 litre GMC seirra engine and if they have antifreeze loss small amounts over time I have heard these heads have a manufacturing problem and they need to be replaced due to a porus casting and they can leak antifeeze into your engine:runaround:
maxwedge
05-22-2009, 08:20 PM
Welcome to AF, the source of this info is what?
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