2014+ Sierra Headlight LED On/Off Mod

MotoMedic · May 17, 2014

Like many of my fellow Sierra SLT owners, I've been hoping to find a way to mod the two LED strips in each headlight to come on at 100% brightness whether day or night. To date, we've had zero luck! (The internal wiring is more complex than just simple +/- connections) I spoke with GTPprix, who has been doing some BCM programming, and he believes it should be possible to change the truck settings so both LED's are on 24/7 at 100%. He just needs someone with a Sierra SLT or A/T in his area to test. So...

If you...

have a 2014 Sierra SLT or A/T
live near Macomb, MI (45 mins north of Detroit)
are willing to be the first with this awesome LED mod

PLEASE PLEASE PLEASE post here -or- message GTPprix!

Thanks in advance!

fondupot · May 17, 2014

In for details.

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Spurshot · May 18, 2014

Dave

I was thinking with all the interest in lighting on the K2, a lighting sub forum might be helpful in pulling all lighting threads together?

draino · May 19, 2014

Can I get his contact, I'm not far from Macomb.

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MotoMedic · May 19, 2014

Can I get his contact, I'm not far from Macomb.

http://www.gm-trucks.com/forums/user/130449-gtpprix/

B&J Aviation · May 22, 2014

MotoMedic. I am in for this also. I don't like just the lower LEDs and I always push in on the fog light button during the day so that both rows are on during the day.

Phil at fast headlights said he spoke to you on this and he has not had time to dedicate with the investigation.

Let GTPprix know to review the module behind the glovebox (for the touch screen) as I noticed when the auto lights illuminate, not only do the DRL LEDs dim down, but when in NAV mode, the screen goes from blue sky to dark sky. There is a tie in there with that system. Maybe he can isolate to just turn on both rows of LEDs to full bright and the remaining functions stay factory setting.

pipdicker · May 22, 2014

Don't live nearby but am DEFINITELY interested. Please update when mod is available. I'm willing to be a long distance guinea pig.

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pipdicker · June 5, 2014

Any update on this?

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MotoMedic · June 11, 2014

GTP still hasn't been able to find anyone with a Sierra SLT or A/T close enough that he can experiment with

Aaron1085 · June 11, 2014

Coke visit southern NH...I'm available and rarely drive the truck anyways. Test away....

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MR. DRAG SLEDDER · June 11, 2014

Also make it so the Fogs are on when you switch to High Beam......

draino · June 12, 2014

GTP still hasn't been able to find anyone with a Sierra SLT or A/T close enough that he can experiment with

Have you talked to him recently? I'll try and drop him another message. I am willing to let him use my truck.

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fondupot · June 18, 2014

This is a dumb idea and it against federal regulations and most state laws.

people been doing it for years. 4hi mod on 99-07 keeps the low beams on when the high beams are on. This was super easy. I did it in my 2002. There was even a 6hi mod, that brought the fogs on as well with the high beams.

thetruck454 · June 18, 2014

I wired my lows, fogs, and highs together with diodes on my 03. The lows and fogs operate independently, but when you turn on the hi's it backfeeds the fogs and lows. All it took was some time and a wiring diagram and a couple cheap diodes. It has been this way for 6 years without any problem. IMO you should only be using hi beams when there aren't others around you, so what does it harm having even more light. It's the people that leave their hi beams on that are the issue.