I noticed you have the same truck and problem I have, have you found a solution? I had a small leak in which I added a radiator sealer, same problem, then I flushed the system changed the thermostat serpentine belt, and the radiator cap, after that I put in a radiator cleaner and noticed a leak, so more radiator sealer, then flushed the system and now not even putting on the heater brings it down. My last resort is to replace the radiator. If you have resolved your problem please send me a resolution. Thanks
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Saturday, December 15th, 2018 AT 11:44 AM