Automatic Headlights

[Jason Robertson]

2017 Denali 3500HD.
Coming home from recent trip, noticed automatic headlights won't turn off in the daylight, dash stays dim and symbol next to speedo is present. I can manually turn them off but dash stays dim telling me the system thinks its still dark. I am using BT Diesels auto sync to reconfigure headlights to USA spec. The auto sync programming was removed and the unit unplugged and the headlights still won't turn off in the daylight. With key on engine off the headlights on this rig could be turned off even though it was Canada spec and the dash would always respond to night and day changes even though the headlights were always on.

I have reached out to BT Diesel hoping he might have a solution or at least a place to start diagnosing. He is extremely busy and I hope to hear something from him later in the week, in the meantime was hoping maybe someone here has stumbled across this.

Thanks in advance!

[MikeBMW]

If BT Diesel and the Autosync dongle for the OBD are connected (technically, The OBD dongle doesn't need to be connected but does for an update), log on to your computer and change the settings for the auto lights on as far as light input into the sensor on the dash. Then, (plug in the OBS dongle) go into your Autosync settings in your truck  and update the tune.
I have mine set to a sensitive setting in case of clouds and potential rain.
I'm sure your truck has the light sensor on the dash?
After any changes, your Autosync can be disconnected unless you want to use some of the features in the OSB dongle unrelated to your truck settings.
Also, always make sure you're receiving the latest updates through the Autosync settings on your trucks infotainment system.

Edited November 28, 2023 by MikeBMW

[Jason Robertson]

7 hours ago, MikeBMW said:

If BT Diesel and the Autosync dongle for the OBD are connected (technically, The OBD dongle doesn't need to be connected but does for an update), log on to your computer and change the settings for the auto lights on as far as light input into the sensor on the dash. Then, (plug in the OBS dongle) go into your Autosync settings in your truck  and update the tune.
I have mine set to a sensitive setting in case of clouds and potential rain.
I'm sure your truck has the light sensor on the dash?
After any changes, your Autosync can be disconnected unless you want to use some of the features in the OSB dongle unrelated to your truck settings.
Also, always make sure you're receiving the latest updates through the Autosync settings on your trucks infotainment system.

What setting did you change? This issue is only within the last few days and no settings have been changed within that timeframe. 

[MikeBMW]

On 11/28/2023 at 7:38 AM, Jason Robertson said:

What setting did you change? This issue is only within the last few days and no settings have been changed within that timeframe. 

Here's a screen shot of the hierarchy to the setting:
 

 

Edited November 30, 2023 by MikeBMW