G 2500 3/4 Ton Van V8-350 5.7L VIN L 4-bbl (1983)
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Absolute Pressure Sensor: Description and Operation
The barometric pressure sensor senses changes in barometric pressure and provides this information, through an electrical signal, to the ECM. The
sensor produces a voltage signal of 3.5 - 4 volts to indicate barometric pressure. The voltage increases in proportion to increases in altitude (decreases in
barometric pressure). This sensor is normally used with the MAP sensor.