Suburban 1/2 Ton 2WD V8-454 7.4L (1987)
Manifold Pressure/Vacuum Sensor: Service and Repair
Fig. 337 MAP Sensor Removal (V6 Models Similar)
The MAP sensor unit is not serviceable and must be replaced as a unit.
1.
Disconnect vacuum hose from MAP sensor, then remove top of air cleaner assembly.
2.
Remove MAP sensor unit retaining clip, then the sensor, Fig. 337.
3.
Reverse procedure to install.
