S15/T15 4WD P/U V6-262 4.3L (1988)
Accumulator HVAC: Customer Interest
A/C - Insufficient Cooling in High Temperatures
GMC NUMBER:
90-1B-84
GROUP:
1B Air Conditioning
DATE:
August, 1990
CORPORATE
NUMBER:
061203
INSUFFICIENT COOLING IN HIGH AMBIENT TEMPERATURES
SUBJECT:
MODELS:
1988-90 S/T TRUCKS WITH AIR CONDITIONING (RPO C60)
Some of the S/T model trucks from 1988 through 1990 with air conditioning 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.
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.
1.
Drain the coolant.
