Knowledge is never irrelevant if you’re still driving around a 30+ year vehicle. Knowledge is relevant across all years, here’s reference from 1960-2025 year range vehicles. I’m not fucking retarded…

lemon-manuals.la

What I do know, first hand experience, is if the air conditioner goes out before the heater core heats up, well you got about 15 seconds to roll the windows down for airflow to keep the windshield from fogging up.