Poor heater in all the Chevrolet Silverado's i have ever owned
Start the truck and let it idle for 30 minutes gets up to 180 degrees if you have the heater fan on it takes an hour to get to 207 degrees. driving in city traffic. I have owned 6 of these trucks 4, 6, or 8 cylinder they all do the same thing, If you do not have the heater on it heats right up.
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