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head gasket sealer

  1. 1st Gen Equinox
    About a week ago, my wife mentioned that the heat was not working in our ’06 Equinox. (no overheating & no white smoke). I took it to 2 mechanics, one mentioned a clogged heater core, another mechanic is thinking head gasket. When I got back, I reversed flushed the entire system with Blue Devil...
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