GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2004 🢒 Montana - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Cellular Communication Component Views
Figure 1:

Front Center of Roof in Overhead Console
Object Number: 734455 Size: SH
(1)OnStar® Button Assembly
(2)Cellular Telephone Microphone
(3)GPS Antenna
Figure 2:

Behind the Center of the I/P
Object Number: 919084 Size: LF
(1)I/P Harness
(2)Vehicle Communication Interface Module (VCIM)
(3)Vehicle Communication Interface Module (VCIM) Connectors C1 and C2