WARNING: This page is about a different car, the 1997 Cadillac Catera. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Transmission Control Module (TCM) - 55-Pin Connector (1 Of 2)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Transmission Control Module (TCM) - 55-Pin Connector (2 Of 2)