1994 GMC Sonoma Owner's Manual - Page 296

Service Replacement Part and Filter Recommendations Engine (VIN) Oil Filter 2.2L (4) PF47 A1 163C 4.3L (Z) PF52 A773C CV789C .CR43TSM GF48 1 RC36 Air Cleaner Filter PCV Valve Spark Plugs* Fuel Filter Radiator Cap 4.3L (W) PF52 AI 163C cv774c .CR43TSM GF48 1 RC36 cv9ooc AC908 GF48 1 RC36 *Use copper-cored resistor type spark plugs. Air Conditioning Refrigerants Not all air conditioning refrigerants are the same. If the air conditioning system in your vehicle needs refrigerant, be sure the proper refrigerant is used. If you're not sure, ask your GM dealer. For additional information, see your "Warranty and Owner Assistance Information" booklet. Air Conditioning Refrigerant Capacity TYPE R-134a "All quantitiesare approximate. SYSTEM C-60 QUANTITY" 30 oz. ( 3 5 kg) NOTICE: R-134a refrigerant is not compatible with R-12 refrigerant in an air conditioning system. R-12 in an R-134a systemwill cause compressor failure, refrigerant oil sludge, or poor air conditioning system performance.