Was told that the thermostat was not serviceable on my 1999 Silverado 1500 5.3L . Mechanic said I’d have to replace the thermostat and the housing as a assembly. I’ve never heard of this being a thing before

  • j_sword67OPB
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    10 months ago

    How can I tell what coolant I have?. It looks green but I’m not sure its supposed to be. 99 Silverado