Affected Component: ELECTRICAL SYSTEM

Date Published
JUN 22, 2020
NHTSA TSB #
10178340
TSB Document
Summary
This Preliminary information communicates to the dealer technician that if after replacing the valve body on an 8L45 or 8L90 transmission the vehicle will not move the valve body may be missing a plug and retainer bolt. Technician's are instructed to obtain and install a plug and retainer bolt kit from the GM Warranty Parts Center to address this concern.