"Low Coolant"
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so did you find it? another place LB7 tend to loose coolant is if you have an injector cup not seated correctly, or if your head gaskets go out,
is your upper radiator hose hard after being shut down for a couple hours or even into the next day? if so thats a for sure sign of cups or hg's
is your upper radiator hose hard after being shut down for a couple hours or even into the next day? if so thats a for sure sign of cups or hg's