Circuit/System Verification
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify that DTC B2455 is not set.
- If DTC B2455 is set
Refer to DTC B2455 (with UE1) , or DTC B2455 (without UE1) .
- Go to next step: If DTC B2455 is not set
- If DTC B2455 is set
- Verify that a successful OnStar voice command can be made.
- If your voice can not be heard clearly.
Refer to Circuit/System Testing - Microphone Malfunction.
- Go to next step: If your voice can be heard clearly
- If your voice can not be heard clearly.
- All OK.