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2015 GMC Denali Driverside Daytime running lights not working

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Running lamps only come on when the headlights are on - or in the case of remote start - or when the parking lights are turned on manually.


So to test things - use the light control knob to turn the parking lights on and off - make sure that all the lights go on and off with this control.


They should also go on with remote start - and go off when the key is turned on - during daylight hours -but remain on at night.

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On 8/4/2018 at 9:40 AM, cdh027 said:

I've seen a ton of GM's driving around with one drl on, including my own 2009 CTS I used to have. 

GM's 'signature' look for the last 15 years or so...


(once they get some time/miles on them)

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