2016 SLT lights in 14/15 SLT/All Terrain almost done

zmnypit · January 24, 2017

It's on their site...

http://www.gen5diy.com/GMC/Sierra/20162017-GMC-HD20162017-GMC-12-Ton-LED-headlamp-harness/

I know it says it's for the new HD's but they still have the same lights at the 14/15 1/2 tons. I questioned him for about 30 minutes on it. He swears it'll work and if it doesn't I can return it. I'm gonna order a set today. They are basically the same as above but with no capacitor. He said he's tested with and without the capacitor and it makes no difference...

The harness looks like this one but it has the resistor for the LED turn signal....

http://www.gen5diy.com/GMC/Sierra/2016-GMC-HD2016-GMC-12-Ton-HID-headlamp-harness/

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It will make a difference with the capacitor. They are bench testing, it works fine on the bench. When its in the truck and the truck is running the headlights shut off sensing no load. I could see it working with the HID 16 lights no problem. If I remember correctly even their harness had a capacitor tucked away inside the wire loom behind the new style plug.

Edited January 24, 2017 by zmnypit

zmnypit · January 24, 2017

You just proved my point.

It's not advertised to work with what we have been doing but give them a call and one appears. So we go from the advertised $187 harness to a $109 harness. Sure a few here with SLT trucks wouldn't have minded saving $80.

Give it a try. Sounds like you have a good safety net in case it doesn't work. Personally I know zmnypit tried to run the LED headlights without a capacitor as he posted earlier, and they wouldn't stay on. Maybe you will fair better.

This ^^^^

Skeeter McSkeet · January 24, 2017

What's the consensus on color temp? I'm thinking 5-6k range, leaning toward 5500 for a fog light match.

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BringTheRain403 · January 24, 2017

It will make a difference with the capacitor. They are bench testing, it works fine on the bench. When its in the truck and the truck is running the headlights shut off sensing no load. I could see it working with the HID 16 lights no problem. If I remember correctly even their harness had a capacitor tucked away inside the wire loom behind the new style plug.

So without the cap how long did they run before they shut off? Could you turn them off and back on again and they would work?

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Arth · January 24, 2017

I know he will answer but a few seconds and then off.

So without the cap how long did they run before they shut off? Could you turn them off and back on again and they would work?

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BringTheRain403 · January 24, 2017

Ok so basically I'd know before I got too far into this if it worked.

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Arth · January 24, 2017

You would get half way. Plug up new headlights, bolt the headlight in and test.

Ok so basically I'd know before I got too far into this if it worked.

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bndawgs · January 24, 2017

What's the consensus on color temp? I'm thinking 5-6k range, leaning toward 5500 for a fog light match.

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I'd go with 4500-5k for the brightest light possible.

BringTheRain403 · January 24, 2017

You would get half way. Plug up new headlights, bolt the headlight in and test.

lol just don't wanna get 5 miles down the road and then have no lights lol

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zmnypit · January 24, 2017

So without the cap how long did they run before they shut off? Could you turn them off and back on again and they would work?

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Maybe 2-3 secs. Nope, you had to turn the truck off and back on.

zmnypit · January 24, 2017

lol just don't wanna get 5 miles down the road and then have no lights lol

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You wont make it that far lol.

BringTheRain403 · January 24, 2017

Just curious how the larger harness can make due without the capacitor....

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zmnypit · January 24, 2017

Just curious how the larger harness can make due without the capacitor....

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If im not mistaken it did have one under the wire loom behind the new style plug. I cant remember for sure. If not it was pulling an external power source from the fuse box and using the signal wire/relays to trigger it.

Plugs, seals, terminals etc ordered. I ordered enough to make 5 sets of adapters. Hopefully they arrive late this week or early next week. For everyone that has PM'd me I'll keep you posted!

Edited January 24, 2017 by zmnypit