Where is the low side service port on a 1991 camaro rs?

The low side service port on a 1991 Camaro RS is located on the accumulator, which is typically found near the firewall on the passenger side of the engine bay. It is usually a smaller port compared to the high side port, and it may have a blue or black cap. To access it, you'll need to look near the air conditioning hoses connected to the system. Always ensure the system is off and properly depressurized before servicing.