Fastener Tightening Specifications
| Application | Specification |
| Metric | English |
| VCU Bracket Screw | 9 N.m | 80 lb in |
| VIU Bracket Screw | 9 N.m | 80 lb in |
Fastener Tightening Specifications
Scheme 30
Scheme 30: OnStar Schematics
Scheme 31
Scheme 32
Scheme 33
Scheme 34
Scheme 35
Scheme 35: Cellular Communication Component Views
| Callout | Component Name |
| 1 | Cellular Antenna |
| 2 | Cellular Telephone Microphone |
| 3 | Global Positioning System (GPS) |
| 4 | Junction Block-Body |
| 5 | Vehicle Communication Unit |
| 6 | OnStar® Button Assembly |
| 7 | Vehicle Interface Unit |
Scheme 36
| Callout | Component Name |
| 1 | Vehicle Interface Unit (VIU) |
| 2 | VIU Connector C-2 (Blue) |
| 3 | VIU Connector C-1 (Red) |
| 4 | I/P Panel-RH |
Scheme 37
| Callout | Component Name |
| 1 | IP Support Bracket |
| 2 | Vehicle Communication Unit (VCU) |
| 3 | Vehicle Communication Unit (VCU) Connector |
| 4 | C248 |
| 5 | Vehicle Communication Unit (VCU) Harness |
Scheme 38
| Callout | Component Name |
| 1 | Global Positioning System (GPS) Harness |
| 2 | GPS Connector |
| 3 | GPS Antenna |
Scheme 39
| Callout | Component Name |
| 1 | Inline Connector C211 |
| 2 | Overhead Reading Lamps |
| 3 | OnStar® Microphone |
Scheme 40
| Callout | Component Name |
| 1 | OnStar® Button Assembly Connector |
| 2 | OnStar® Button Assembly |
Scheme 41
| Callout | Component Name |
| 1 | Radio |
| 2 | I/P Connector to Radio Connector C-3 |
| 3 | Jumper Connector, With Remote CD |