Somerset Regal L4-151 2.5L (1985)
![background image](/buick/somerset_regal/l4-151_2.5l/Page-1049002.png)
Fig. 6 Pressure differential valve and brake warning lamp switch
Fig. 7 Delco-Moraine aluminum dual master cylinder with built in warning lamp switch
Fig. 8 Low vacuum switch. 1984 and later models
Fig. 9 Low vacuum switch. 1983 models