Removal Procedure

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Remove the bolts/screws from the data link connector.
Remove the lower data link connector.

Fig 1: Removing Data Link Connector
Courtesy of GENERAL MOTORS CORP.