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2015 yukon headlights

Jordan Lee Wynn

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Jordan Lee Wynn New Member

Jordan Lee Wynn

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Question ?? does anyone know if the 2018 Yukon "HID" headlight assembly will fit my 2015 Yukon ? and if so are they just plug and play or are the wiring harness's different ? I've been running aftermarket HID's and I'm tired of always having to work on them, just not reliable and the stock halogen bulbs in projectors just plain suck !!

cmatt Enthusiast

cmatt

Posted
Posted

I have done this exact swap. The entire headlamp assemblies themselves are a direct swap. Unfortunately, on SLE & SLT Yukons the voltage that is sent to the halogen headlamp bulbs is pulse width modulated (PWM). It means the voltage is pulsed rapidly by the BCM.

Here’s a video I did showing what that does to factory Denali HID headlamp assemblies.



You can see how the PWM voltage causes the HID ballasts to rapidly turn on/off until they go into protect mode and shut down.

I created a custom relay harness that connects between the headlamps and factory harness that solves this problem. The only evidence is an occasional notification via the OnStar diagnostic alert email that a bulb is out. There are no notifications/warning lights that come up on the cluster. It’s been working great for almost 2 years.

I create and build various wiring harnesses for the 2015-2019 GM full-size suv platform.


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Jordan Lee Wynn New Member

Jordan Lee Wynn

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Wow, this is very helpful to me. The aftermarket HID kit from retrofitsource has a relay harness as well but the other parts such as ballasts and bulbs just haven't held up well for me. If I were interested in purchasing a set of 2018 headlights would you be willing to build and sell me a harness for them ? Thanks for your help.

cmatt Enthusiast

cmatt

Posted
Posted
Wow, this is very helpful to me. The aftermarket HID kit from retrofitsource has a relay harness as well but the other parts such as ballasts and bulbs just haven't held up well for me. If I were interested in purchasing a set of 2018 headlights would you be willing to build and sell me a harness for them ? Thanks for your help.


I tried to send you a PM, but I can’t tell if it went through. Here’s what I sent.

Send me an email to [email protected] (I keep everything organized through there). I’ll get you the details and set up with a harness.

 

Matt

 

 

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