GM Service Manual Online
For 1990-2009 cars only

Notice: R-12 refrigerant and R-134a refrigerant must never be mixed, even in the smallest of amounts, as they are incompatible with each other. If the refrigerants are mixed, compressor failure is likely to occur. Refer to the manufacturer instructions included with the service equipment before servicing.

    • Do not mix R-12 and R-134a, even in the smallest amounts. The refrigerants are incompatible with each other. Air conditioning (A/C) compressor failure is likely to occur if the refrigerants are mixed.
    • Use only the specified lubricant (PAG) for the R-134a A/C system and the R-134a components. A/C compressor failure is likely to occur if lubricants other than those specified are used.
        Coat all of the fittings and the O-ring seals with clean 525 viscosity refrigerant oil in order to provide a leak-proof seal and to aid in the assembly and disassembly.
    • Do not store or heat the refrigerant containers above 52°C (125°F).
    • Do not heat a refrigerant container with an open flame. Place the bottom of the container in a pail of warm water if warming is necessary.
    • Do not intentionally drop, puncture, or incinerate the refrigerant containers.
    • Refrigerants will displace oxygen. Work in well-ventilated areas in order to prevent suffocation.
    • Do not introduce compressed air into any refrigerant container or refrigerant component. Compressed air will cause contamination.
    • Do not carry a R-134a container in the passenger compartment of a vehicle.

All of the R-134a disposable (blue) containers are shipped with a metal screw cap in order to protect the valve and the safety plug of the container from damage. Replace the cap after each use.