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  1. R

    overheating on highway. completely lost

    Hey all, I've got an 03 eb 5.4. Truck started overheating on the highway.Put in new t-stat, water pump, fan clutch, and serpentine belt then took it in for a full system flush. Runs perfect on regular roads. Once I'm on the highway, around 70 mph, she starts overheating. If I get off...
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