To remove

Remove the ACC/MCC unit with 82 93 474 REMOVAL TOOL

Fig 1: Illustration For Step 1
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Remove the OnStar panel by releasing the catches on the rear edge of the panel.

Fig 2: Illustration For Steps 2-3
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Unplug the OnStar-panel connector.