Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
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.