There isn't a single, easily accessible "AC low pressure cut-off switch" in the traditional sense on a 1999 Chevy S-10's AC system. The low-pressure cutoff is handled by a
pressure switch that's part of the AC system itself. This switch is usually located near the evaporator or accumulator, typically hidden within the engine compartment. It's not a switch you'd flip; it's an integral part of the system's safety mechanism. If the pressure drops too low, this switch automatically shuts off the compressor to prevent damage.
To find it, you'll likely need to consult a repair manual specific to your 1999 Chevy S-10. The manual will show diagrams of the AC system and pinpoint the location of the pressure switch. It might be integrated with other components making it difficult to identify without the proper diagrams.
Keep in mind that working on AC systems involves handling refrigerants that can be harmful. If you're not comfortable working on AC systems, it's best to take your S-10 to a qualified mechanic.
