The headlamps may be turning on automatically during daylight conditions instead of the Daytime Running Lamps (DRL) on some 2022 Tahoe, Suburban, Yukon, Escalade and 2022-2023 Corvette models. (Fig. 6) DTC B108E (Ambient Light Sensor Signal) also may be set.
Fig. 6
The ambient light sensor is used to monitor outside lighting conditions. The Body Control Module (BCM) monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either Daytime Running Lamps or automatic lamp control when the headlamp switch is in the AUTO position
If the headlamps and DRL concern is present, do not replace the ambient light sensor or any other parts. Updated software is available to reprogram the BCM for 2022 model year vehicles to address the lighting operation.
The updated software also may be available as part of an Over-the-Air (OTA) programming event. Customers should be advised to watch for any updates on the infotainment system.
For 2023 model year Corvettes with the headlamp operation condition, updated software may not be available yet. For these vehicles, it is recommended to check the headlamp switch setting and for an illuminated Lights On Reminder symbol on the instrument cluster to ensure the headlamps are on when driving in low lighting conditions. (Fig. 7)
Fig. 7
For more information, refer to #PIT5936A and #PIC6466.
– Thanks to Jim Will and Matt Bierlein
