What type of refrigerant for 1988 Toyota truck?

The 1988 Toyota truck originally used R-12 refrigerant, which is a chlorofluorocarbon (CFC) and has been phased out due to environmental concerns. If you need to recharge the system, it’s common to retrofit it to R-134a, a more environmentally friendly option. This process typically involves replacing the receiver-drier, expanding valve, and possibly the compressor, as well as ensuring the system is properly evacuated before adding R-134a. Always consult a professional for retrofitting and servicing to ensure proper handling and compliance with regulations.