K 1500 Truck 4WD V6-262 4.3L VIN Z (1992)
Pressure Control Solenoid (PCS): Technical Service Bulletins
A/T - Holley Variable Pressure Control Solenoid
GROUP REF.: Transmission
BULLETIN NO.: 4771O9A
DATE: May, 1994
SUBJECT:
NEW VARIABLE PRESSURE CONTROL SOLENOID ASSEMBLY
MODELS:
1991-94 CHEVROLET AND GMC TRUCK C/K, P TRUCKS, SUBURBANS AND G VANS
TRANSMISSION APPLICATIONS:
1991-1994 HYDRA-MATIC 4L80-E/4L80-EHD (MT1)
THIS BULLETIN IS BEING REVISED TO CORRECT YEAR UNDER PARTS INFORMATION PARAGRAPH. PLEASE DISCARD CORPORATE
BULLETIN # 477109.
Beginning with 1994 model Start of Production (SOP). all HYDRA-MATIC 4L80-E/4L80-EHD transmissions are being built with a Holley variable
pressure control solenoid (PCS). Because of differences in the electronic calibrations, the Holley and the Bosch variable pressure control solenoids are
not interchangeable.
When servicing a variable pressure control solenoid (POS), it must be replaced with the same brand as the original.
