DRL Differences

[ShotgunZ71]

Has anyone ever gotten an explanation why the DRLs in the Silverado come on once the vehicle is taken out of park, yet on the Sierra, the DRLs come on as soon as truck is turned on/started? I know the Silverado has different DRLs dependent on trim level, but what I'm referring to is the illumination sequence between the two models.

[nards444]

98% of those trucks are the same.  Assuming same trim levels and same years my guess is the settings are set different and probably can be changed.  Canadian built vehicles are set different as well sometimes.

[unit]

I have no experience with the GMC but it make sense not to have the DRL's on when in park.  Lighted DRL's in park could be a nuisance to others in some circumstances.  Also, there is no way to program them otherwise on the 2020 Chevrolet - 2021 models might be different but that's not likely.

[ShotgunZ71]

Makes one wonder why the difference, eh? On my High Country HD, they only came on when taken out of park. Now, on the Denali, they are on as soon as truck is started. I thought something was wrong at first, but then noticed the other 2020+ Sierra HD's do the same. They may be able to be turned off when turning off the auto lighting. I will check that to see.

[ShotgunZ71]

Verified they can be turned off with the AUTO lighting knob. No where do I see an option about them coming on with vehicle start or taken out of park. Must just be one of those differences between the Chevrolet and GMC. Similar to why the High Country has LED lighting for most of the exterior lights except for front the turn signals. Doesn't make much sense, especially since those lights aren't used for anything but turn signals.