To convince the transmission control module that a working automatic was still installed and clear the fourteen-odd diagnostic codes, [Dean] put together a block of eight common automotive relays.

Affected units are subject to a condition in which the transmission control module software is unable to detect problems with the transmission pressure, causing the control valve to fail.

Get all the news you need in your inbox each morning. To fix the issue, dealers will install a new transmission control module software free of charge and GM will provide a special coverage ...

To resolve the issue, dealers will install an updated transmission control module software at no charge. GM has also initiated a special coverage programme to repair transmissions found to have a ...