For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
DEFINITION: The OnStar® personal calling feature may not be able to understand some or all words spoken.
1 | Did you perform the Cellular Communication Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Cellular Communication
2 | Important: The vehicle must be located in a quiet area.

1. Turn ON the ignition, with the engine OFF.
2. Press the OnStar® Call Center button.
3. Ask the OnStar® operator if your voice can clearly be heard.

Does the OnStar® operator hear your voice?

Go to Step 3

Go to OnStar Microphone Inoperative - Caller Cannot Be Heard

3 |

1. Press the call answer button.
2. Pronounce all Hands Free commands. Refer to OnStar Description and Operation for proper pronunciation.

Did the OnStar® system recognize any of the voice commands?

Go to Step 5

Go to Step 4

4 |

1. Press the call answer button.
2. Have another person pronounce all Hands Free commands. Refer to OnStar Description and Operation for proper pronunciation.

Did the OnStar® system recognize any of the voice commands?

Go to Step 5

Go to OnStar Description and Operation

5 | The system is operational, but cannot identify certain word commands due to pronunciation. For tips on proper pronunciation refer to OnStar Description and Operation . Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2