V 3500 P/U 4WD V8-379 6.2L DSL (1988)
Refrigerant: Technical Service Bulletins
A/C - Use of R-22 Refrigerant Not Recommended
GMC NUMBER:
88-T-65
GROUP:
1B - Air Conditioning
DATE:
December, 1987
CORPORATE
NUMBER:
861201
SUBJECT:
R-22 REFRIGERANT
MODELS:
ALL TRUCK MODELS
Use of R-22 refrigerant in any GMC truck A/C system is not recommended. R-22 refrigerant will not mix with the compressor lubricant currently used.
Any mixture of R-12 and R-22 may cause the following to occur:
^
A/C compressor relief valve to blow at idle due to the build up of head pressures.
^
Loss of A/C system charge due to R-22 seeping through A/C hoses.
^
Compressor failure due to insufficient lubrication.
R-12 is the only refrigerant that should be used in GMC truck A/C systems.
