G 20 Van V6-262 4.3L VIN Z (1993)
Fluid Pressure Sensor/Switch: All Technical Service Bulletins
A/T - Buzzing Noise on Shutdown
Number: 93-28-7A
Section: 7A
Date: OCT. 1992
Corporate Bulletin No.: 277141
ASE No.: A2
Subject:
BUZZING NOISE ON ENGINE SHUTDOWN
Model and Year:
1993 C/K, S/T TRUCKS AND 1993 G AND WL VANS WITH 4L60-E AUTOMATIC TRANSMISSION
TRANSMISSION APPLICATIONS:
1993 HYDRA-MATIC 4L60-E (M30)
TRANSMISSION MODELS:
All
SUBJECT:
Pressure Regulator Valve Buzz
VEHICLE APPLICATIONS:
C/K, S/T - Trucks G, M, L - Vans
CONDITION:
Some 1993 vehicles equipped with the HYDRA-MATIC 4L60-E transmission may exhibit a buzzing noise coming from the transmission on engine
shutdown.
CAUSE:
The buzzing noise may be a result of the pressure regulator valve oscillating due to oil pressure instability during engine shutdown.
CORRECTION:
