LeSabre V6-231 3.8L VIN C SFI (1990)
Power Seat Control Module: Customer Interest
Memory Seat Control Module - May Lock Up
Bulletin 90-10-17
Date Feb. '90
Ref. No. 90-069-10
Corp. Ref. No. 001601
SUBJECT:
MEMORY SEAT CONTROL MODULE "LOCK UP"
MODELS AFFECTED:
1990 BUICK PARK AVENUES AND ULTRAS WITH AG3 SEAT OPTION.
VIN BREAKPOINTS:
1990 BUICKS: VEHICLES UP TO # 604581
DESCRIPTION OF PROBLEM
The memory seat control module may lock up during manual adjustment of the driver's seat, disabling the driver's seat. The module may be reset to
normal operation temporarily by either disconnecting the power feed connector to the module or by pulling the power feed circuit breaker (# 24). The
module is likely to lock up again with subsequent seat adjustment. The module will not return to its normal low-current mode when locked up; some cars
may exhibit drained batteries if unused for several days.
DESCRIPTION OF REPAIR
Memory modules with GM Part # of 20564797 and a date code of 9G20 (July 20, 1989) or after may be susceptible to the lockup condition. Parts with a
date code prior to 9G20 are not susceptible.
Remove memory seat module and replace with new service part number 25556224. Modules with Part Number 20564797 and a date code after 9G20
must not be used; all such modules should be returned to GMSPO for eventual return to ITT-Hancock.
Parts are currently available from GMSPO.
The seat may be made to operate as a manual seat while waiting for a replacement module by connecting together the 6-way body harness connector
from the switches and the 6-way connector to the seat motors. The module power connector must be disconnected to prevent draining the battery when
the module is in the locked up state.
