Verify GMC Battery Voltage

June 14, 2023
This bulletin applies to 2016 GMC Sierra and Yukon vehicles. Some customers may also comment on a weak or dead 12V battery after sitting for 10 days or more.

This bulletin applies to 2016 GMC Sierra and Yukon vehicles. Some customers may comment that one or more of the following concerns are inoperative:

- Forward collision alert/following distance indicator

- Pedestrian alert

- Collision mitigation braking/pedestrian collision mitigation

- Lane departure warning

- Lane keep assist

- Adaptive cruise control

- Intelibeam

Some customers may also comment on a weak or dead 12V battery after sitting for 10 days or more, low battery light on, or battery low start vehicle message displayed. The cause may be that the front camera module (FVCM) will lock out during a power up or power down cycle, preventing functionality. The lock out leaves the module powered on and will drain the battery if the vehicle sits for an extended period of time.

Verify that the battery voltage is more than 12.6V but less than 15.5V before proceeding with reprogramming. The battery must be fully charged before reprogramming. Reprogram the FVCM with the latest calibrations.

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