K 2500 Truck 4WD V8-379 6.2L DSL (1988)
Refrigerant Pressure Sensor / Switch: All Technical Service Bulletins
A/C - Pressure Cycling Switch Clicking Noise
GMC NUMBER:
88-T-188
GROUP:
1B - Air Conditioning
DATE:
January, 1989
CORPORATE
NUMBER:
861207R
SUBJECT:
A/C PRESSURE CYCLING SWITCH" CLICKING" NOISE
MODELS:
1988 C/K MODELS WITH AIR CONDITIONING
FIGURE 1
Some 1988 C/K trucks have experienced an A/C pressure cycling switch "clicking" sound. This condition exists when compressor operation is needed,
such as A/C or defrost. The condition is inherent to the switch's design and its location on the A/C accumulator "J" pipe (See Figure No. 1). The service
procedure and parts required to address this condition are as follows:
NOTE:
This procedure will significantly reduce the "clicking" sound, but may not eliminate it completely in all cases.
PARTS INFORMATION
DESCRIPTION
PART NUMBER
