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Oil color can tell you a lot about the overall condition of your vehicle's A/C compressor and other components. Here's what to look for:
If your truck heater has a water valve, you probably didn’t activate it very often during the summer months. Now that it's cooler, you want to turn up the heat.
Trouble is, after a season of disuse, the valve can stick and affect your ability to control the temperature in the cab.