our 2002 chevy silverado has never ever screwed up liek this we always put the proper dexcool collant in it and everything i know these cooling systems on these trucks were stupid because they had the thermostat on the intake side of the engine enstead of the outlet both heater hoses get hot no matter what heater on or off the coolant circulates all the time GM has had this design for decade i have a 62' GMC grain truck with the blending door instead of the coolant shut off valve ive only seen these valves on older fords and dodges so either your core is plugged or the motor that turns the blending door is hatched or on some trucks there was 2 small filters right infront of the heater/A/C cores they might be plugged but if theyre plugged no air flow will be present
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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