V 3500 P/U 4WD V8-350 5.7L VIN K TBI (1988)
Accumulator HVAC: Customer Interest
A/C - Insufficient Cooling in High Temperatures
GMC NUMBER:
90-1B-85
GROUP:
1B Air Conditioning
DATE:
August, 1990
CORPORATE
NUMBER:
061202
SUBJECT:
INSUFFICIENT COOLING IN HIGH AMBIENT TEMPERATURES
MODELS:
1988-90 R/V WITH AIR CONDITIONING (RPOs C60 OR C69)
Some of the R/V models from 1988 through 1990, either with or without rear A/C, may receive comments of insufficient cooling in high ambient
temperatures. To address this condition a water shut off valve which operates during Max A/C and an insulator cover for the accumulator may be added.
In addition, the refrigerant charge has been revised to increase air conditioning performance.
SERVICE PROCEDURES:
Water Valve Installation:
CAUTION: Coolant may be pressurized and hot. Use care to ensure that the coolant is at ambient temperature. Possible burns could result from contact
with hot coolant.
