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GMC Truck
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1991
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K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI
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Repair and Diagnosis
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Heating and Air Conditioning
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Refrigerant
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Technical Service Bulletins
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A/C - Retrofitting R-12 to R-134a
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A. Retrofit Procedure
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Geo Models
Geo Models
Compressors DO NOT HAVE TO BE REPLACED as part of the retrofit. New compressors are shipped with enough oil to accommodate the entire A/C system. Do not add additional PAG oil to the system it the compressor is being replaced.