2016 Tahoe HID Headlight Conversion

Discussion in 'General Tahoe/Yukon/Escalade Discussion Forum' started by JerseyTahoe, Mar 27, 2017.

  1. JerseyTahoe

    JerseyTahoe New Member

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    I am a new 2016 Tahoe LT owner and so far my only complaint is the terrible headlights! Has anyone converted over to HID using factory GM parts? The headlight housings see to be the same at 1st glance for the Halogen and HID lights.
     
  2. Tahoe2017

    Tahoe2017 New Member

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    your housing are projector style the easiiest upgrade is LED. plug and play .
    adding HID requires different harness, and power.
     
  3. cmatt

    cmatt New Member

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    Tahoe2017 is correct, the LS/LT headlight assemblies have halogen projectors in them. Outside of the bulb mounting differences (H11 for halogen & D3S for HID), the projectors may be designed differently for each type.

    I have successfully swapped in OEM HID headlight assemblies in my 2015 SLT Yukon. I created a custom relay harness with OE connectors that addresses the circuitry differences.

    In my opinion, the light output is greatly improved.


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  4. Tahoe2017

    Tahoe2017 New Member

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    please elaborate on the changes you did to swap in factory Hid.
    stock headlights on these Halogen should never have been approved as sufficient lighting.
     
  5. cmatt

    cmatt New Member

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    So I just made this great post in response to Tahoe2017’s question, hit reply and it’s nowhere to be found. Way to go Tapatalk. SMH


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  6. cmatt

    cmatt New Member

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    This is ridiculous! I just re-created the post via PC. It initially showed, but then disappeared. Any ideas? I don't think it's operator error, but who knows.

    Anyway, to answer Tahoe2017 in a very condensed version, the pulse width modulated (PWM) signal used by suvs with halogen bulbs pulses fast enough to energize a relay. I build wiring harnesses for the 2015+ suv platform and created a relay harness for the OEM HID headlamp assemblies that is plug and play. In the harnesses I build, I use the same materials, wire gauges, connectors etc. GM does. In this case, the only thing noticeable is the two relays mounted on the driver's side fender.
     
  7. Tahoe2017

    Tahoe2017 New Member

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    This is not the most user friendly forum, terrible picture posting limits.

    Question; ok so you are turning on your Relay with Headlight PWM drive signal?
    So my question is Is the Daytime driving light mode signal, which is about 1/2 the frequency of headlights, does your relay pull in with DRL on which is basically lower frequency rate ?
    and does your relay buzz with DRL on ?
     
  8. cmatt

    cmatt New Member

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    Agreed, it’s not very user friendly.


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  9. cmatt

    cmatt New Member

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    To answer your question, yes, I’m using the PWM to activate the relay. I’m doing this on a 2015 Yukon. It uses LED DRLs across all the trims. The headlights aren’t part of the DRL functionality like the Tahoe’s are.

    Let me think on it. The LED strip on the Tahoe headlight should still illuminate since it has its own circuit. What I don’t know is if the lower amount of current sent to the halogen headlight for DRL functionality is too little to energize the relay. If that is the case, in theory, then it would allow to only have the LED strip active as a DRL.

    I may PM you on this as well to sort out some details.

    I tried to post the lighting schematics, but they have disappeared. Smh


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  10. cmatt

    cmatt New Member

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    @Tahoe2017 I sent you a PM, but that doesn’t appear to be working for me either.


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  11. 73Vetteman

    73Vetteman New Member

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    You need to use a capacitor of 4700uf or greater to keep the relay from buzzing. The easiest thing to do is buy the code cancel capacitor that is available. You just plug one end into your truck's headlight wire and the other end into your HID relay harness.

    If you want to convert your DRL's from headlight to LED's see my post about DRL mod.
     
  12. Team Mudshark

    Team Mudshark New Member

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    LEDs will take over the world.

    I firmly believe in the K.I.S.S. principle. Go to ebay and buy a pair of low beam LED bulbs. I use Lasfit. There are a bunch on there now stupid cheap. I don't trust them. Expect to pay about $32 now. I've upgraded my headlights several times over the last 13 years. The LEDs are a world apart. They come with a small fan built in for crying out loud. When I 1st hit the streets with these I felt embarrassed. I was now looking into the back rooms of my neighbors houses as I was pointed at them. These things are super bright and super white. Simple plug and plug as mentioned above. Save your money and don't bother with the high beams, You will never need them again. I went ahead and installed a pair of those too but I like the low beams better.