1985 GMC S15 2.2L 4 Cyl. 1982-1984 GMC S15 1.9L 4 Cyl. 1983-1984 GMC S15 2.0L 4 Cyl. Notes: A/C Compressor Cut-Off Switch -- AC Compressor High Pressure Cut-Out Switch. In earlier vehicles, they are used to directly turn the compressor off to avoid compressor failure.
