I'm asking these questions on behalf of my son.
His Cadillac is a 2003 Seville STS with 128K on it.
Last spring he replaced his magnetic ride shocks (F55 option?) with a non-electronic kit marketed by a well known AM supplier.
Since install, his transmission does not shift from 3rd gear to 4th. The "Service Suspension" dash light is illuminated. We did replace the 1-2, 2-3 shift solenoids, and he took his car to an independent GM shop with a Tech II to have the option deleted from his TCM. This fellow couldn't find the F55 option to delete it...?
We are at our wits end with this problem and my last brain storm is to replace the Seville STS TCM with a non-magnetic ride TCM (Seville SLS ?).
We are open to any and all suggestions.
Thank you ll,
Roger
His Cadillac is a 2003 Seville STS with 128K on it.
Last spring he replaced his magnetic ride shocks (F55 option?) with a non-electronic kit marketed by a well known AM supplier.
Since install, his transmission does not shift from 3rd gear to 4th. The "Service Suspension" dash light is illuminated. We did replace the 1-2, 2-3 shift solenoids, and he took his car to an independent GM shop with a Tech II to have the option deleted from his TCM. This fellow couldn't find the F55 option to delete it...?
We are at our wits end with this problem and my last brain storm is to replace the Seville STS TCM with a non-magnetic ride TCM (Seville SLS ?).
We are open to any and all suggestions.
Thank you ll,
Roger