DIY: Make 2015-2017 LS/LT headlights operate like a LTZ headlight (LED as DRL vice low beams)

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cmatt

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I live on the Gulf coast in the area hit by hurricane Sallie early Wednesday morning. Power is coming back and roads are being cleared, but data/internet is still down including me. We were certainly lucky compared to others. I appreciate everyone's patience.
 

cmatt

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So now that things are verified, I'm ready to offer the newest DRL harness. It will give LTZ headlight behavior to 2015-2017 LS & LT Tahoes and Suburbans with the exception of the LED strips' ability to change brightness levels.

To inquire, please email me at [email protected]. This will help me keep things organized. Payment for the harness will reserve your place in the order queue. For those of you who previously got the DRL pigtails, I am offering a $25 discount (via core refund). Once the pigtails are received back and verified to be in acceptable condition, credit will be issued.

7f2487c3ae3486fc6f9864a4633fff28.jpg
 

NappyBoy

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So now that things are verified, I'm ready to offer the newest DRL harness. It will give LTZ headlight behavior to 2015-2017 LS & LT Tahoes and Suburbans with the exception of the LED strips' ability to change brightness levels.

To inquire, please email me at [email protected]. This will help me keep things organized. Payment for the harness will reserve your place in the order queue. For those of you who previously got the DRL pigtails, I am offering a $25 discount (via core refund). Once the pigtails are received back and verified to be in acceptable condition, credit will be issued.

7f2487c3ae3486fc6f9864a4633fff28.jpg
will i lose the parking light option like the old pigtails ?
 

GranPrix

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...I will reiterate about the LED strip brightness on 2015-2017 factory headlight assemblies. Their brightness cannot be changed. GM has them built this way.

Matt is there a way around this? Is the brightness a dictated by a combo between the headlight housings and a control module?
 

GranPrix

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View attachment 257900 Hey Guys,

so I installed CMatt's latest harness and I'm happy to report it has all functions as described.

Supports:

LED stripe on remote start
Parking Lights
Automatic on when vehicle is in drive

I took it a step further about a year ago by installing the standard 2018 headlights that have the brighter LED light bar, and I have full LED brightness. I'm going to unload a video later to show the results.

great work Matt. This is a photo of my car in drive. It was super sunny so it's harder to see but it's working great

View attachment 257898

Do you have the part# for the 2018 headlights?
 

cmatt

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Matt is there a way around this? Is the brightness a dictated by a combo between the headlight housings and a control module?
Unfortunately there isn’t. There is no control module for the headlights. The LED strip has resistors hardwired into it that step down the voltage.


Sent from my iPad using Tapatalk
 

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