QuickCar 0-40 PSI Liquid Filled Tire Pressure Gauge 2010421 1999-1999 GMC K1500

1999-1999 GMC K1500

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QuickCar 0-40 PSI Liquid Filled Tire Pressure Gauge 2010421 1999-1999 GMC K1500All liquid filled gauges are affected by temperature and atmospheric changes. The air and liquid inside the gauge expands and contracts with these changes. An internal pressure build up will affect your reading. The internal gauge pressure must be the same as the environment to get a true reading. This is why all liquid filled gauges are equipped with bleeder valves to equalize the internal pressure to that of the environment. QuickCar has taken a new