K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Refrigerant Oil: Fluid Type Specifications
REFRIGERANT OIL TYPE
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R-12 refrigerant oil, 525 viscosity (See Note).
NOTE: If vehicle has been converted to R-134a use PAG (Polyalkaline Glycol) synthetic refrigerant oil (GM Part No. 12345923) or equivalent.
