Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Communication Interface Module Scan Tool Information
2008 Pontiac Grand Prix BaseSECTION Communication Interface Module Scan Tool Information
Vehicle Communication Interface Module Scan Tool Data Parameters
| Parameter | System State | Expected Value | Definition |
|---|---|---|---|
| Operating Conditions: Ignition ON | |||
| Date | - | Numeric | This displays DD/MM/YYYY. This is the date the VCIM was manufactured. |
| GPS Signal | - | Yes | The scan tool displays Yes or No. Yes is displayed if there is a GPS signal received by the VCIM. |
| Signal Strength | - | 68 | The scan tool displays 0-100. This is the VCIM signal strength. |
| Signal Type | - | Digital | The scan tool displays Digital or Analog. This is the signal type received by the VCIM. |
| Time | - | Numeric | The scan tool displays HH:MM:SS. This is the current time. |
| Transceiver ID | - | Varies | The scan tool displays a 2-5 digit value. This is the transceiver identification number. |
Vehicle Communication Interface Module Scan Tool Output Controls
| Scan Tool Output Control | Description |
|---|---|
| Acquisition Setting | It lets you choose from various selections of digital cellular technology systems: AMPS (Advanced Mobile Phone System), CDMA (Code Division Multiple Access), PCS (Personal Communications Service), GSM (Global System for Mobile Communications). Select CDMA because Verizon provides the cellular technology for OnStar which uses CDMA system. |
| B1000 Data | This shows the data recorded when DTC B1000 was set in the VCIM. |
| Green LED | The VCIM illuminates the green LED on the inside rearview mirror when ON is selected. |
| Phone Call Test | When ON is selected, VCIM commands OnStar to connect to the OnStar Center. |
| Program Digital Home SID - NID | Select SID (Station ID) and NID (Network Interface Device) per your location. |
| Program Phone Number | VCIM provides mobile ID # and mobile directory # for this vehicle. Use arrow keys to change the phone # if necessary. |
| Red LED | The VCIM illuminates the red LED on the inside rearview mirror when ON is selected. |
| Set Language | Pick an option between 3 different languages: English, French Canadian, and Spanish. |
| VCIM Setup | Screen displays: Move the vehicle to an open, outside area and make sure the vehicle is running. Following this VCIM setup procedure, a call will automatically be made to the OnStar Call Center. Inform the Call Center advisor that a new VCIM has been installed. Have the STID and ESN from the new VCIM ready to provide to the advisor. Refer to the Reconfiguration Procedure in the Cellular Communication section of SI for more info. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.