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2016 Sierra Denali Headlights & Taillights on a 2015 Sierra Denali

BlackOps

By BlackOps
in Modifications & Accessories

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BlackOps Enthusiast

BlackOps

Posted
Posted

Smh...I just saw a black GMC Sierra Denali like what I have, but something caught my eye that was different about it when it applied the brakes. I followed it...lol...and sure enough, they grill, bumper, headlights, taillights, foglights, etc. were all different. I will say, I like my bumper, foglights, and grill better, but I GOTTA have those headlights...and possibly taillights. Has anyone did the swap or know if they're interchangeable?

TJay74 Senior Enthusiast

TJay74

Posted
Posted

I don't think anyone has yet, based on the info the engineer from GM gave me it wont be easy at all. Wiring is different, BCM calibration is different as well. GM pretty much made sure that the new lights could not be used on previous generation trucks. Has something to do with DOT requirements that GM has to go thru to certify and validate the headlights for the model year they are to be used in.

JRaschke11 Enthusiast

JRaschke11

Posted
Posted

The verdict is still out on the taillights as far as I know. Nobody has posted anything definitive here.

 

As for the headlights, a couple guys have seen them up close and you would need a whole new front end. Mounting points and everything are different. They definitely made sure we couldn't swap in the headlights.

Ohsathlete20 Enthusiast

Ohsathlete20

Posted
Posted

I work at a GMC dealer and we tried for a couple guys that were asking... the wiring is all different so unless someone makes or is going to make a kit there will need to be a re-wire... could require a reflash... I am not in that part of the business so I am not to sure... Only know it was not able to plug and play. Hope that might help. Merry Christmas you filthy animals!

ricker6869 Enthusiast

ricker6869

Posted
Posted

I work at a GMC dealer and we tried for a couple guys that were asking... the wiring is all different so unless someone makes or is going to make a kit there will need to be a re-wire... could require a reflash... I am not in that part of the business so I am not to sure... Only know it was not able to plug and play. Hope that might help. Merry Christmas you filthy animals!

Are the mounting points actually different?

Jonflores1982 Enthusiast

Jonflores1982

Posted
Posted

DYI came up with a hardness for the use of LED headlights on SLE trucks so I am sure someone will come up with one eventually. What I want to know if they actually fit? When we say new front in from what I have seen yes the headlights , grill and bumper are different but not the hood or fenders .... As far as the taillights I am assuming an even easier fit but I want confirmation from someone and also to see where you can even buy them. Part numbers would be great!!

JRaschke11 Enthusiast

JRaschke11

Posted
Posted

DYI came up with a hardness for the use of LED headlights on SLE trucks so I am sure someone will come up with one eventually. What I want to know if they actually fit? When we say new front in from what I have seen yes the headlights , grill and bumper are different but not the hood or fenders .... As far as the taillights I am assuming an even easier fit but I want confirmation from someone and also to see where you can even buy them. Part numbers would be great!!

 

There was a thread a few weeks ago, I can't find it now. Someone specifically said they had a 2016 in the shop and looked at the headlights and he said they wouldn't fit a 2015 and "you would need a new front end". I don't know what that means unless they did change the mounting points on purpose. Anything electrical can be overcome but the physical is tougher. Especially when it's almost a thousand bucks for a single 2016 headlight it better be perfect.

 

If I didn't live an hour and a half from the nearest GM dealership I would go check it out myself.

TJay74 Senior Enthusiast

TJay74

Posted
Posted

And even if you can get them mounted it doesn't mean they will work, even with wiring changes. If GM made changes to the BCM as I was lead to believe they did as I see no reason why the engineer would lie about it then you are also talking about something more than the wiring harness to the lights and getting into a chassis harness along with trying to get the BCM programmed which will be all but impossible to do unless GTPrix is able to do it.

 

I am thinking GM and most of the other manufactures are trying their best to make sure people don't modify much on the vehicles any more to reduce their liability in the long run.

JRaschke11 Enthusiast

JRaschke11

Posted
Posted

And even if you can get them mounted it doesn't mean they will work, even with wiring changes. If GM made changes to the BCM as I was lead to believe they did as I see no reason why the engineer would lie about it then you are also talking about something more than the wiring harness to the lights and getting into a chassis harness along with trying to get the BCM programmed which will be all but impossible to do unless GTPrix is able to do it.

 

I am thinking GM and most of the other manufactures are trying their best to make sure people don't modify much on the vehicles any more to reduce their liability in the long run.

 

I doubt they care about liability, as they wouldn't be liable for anything you did aftermarket. What they really care about is people buying new trucks and if they can get even a few people to upgrade from a 2014 or 2015 for the new headlights and taillights then they have done their job of screwing the consumer out of as much money as possible.

 

Though personally I would believe that the money they make in parts sales by selling us $1800 pairs of LED headlights and then wiring harnesses and BCM programming would far outweigh the few willing to upgrade to a whole new truck.

TJay74 Senior Enthusiast

TJay74

Posted
Posted

It is completely about liability, case in point look no further than VAG and the current diesel scandal. The .gov has a very long arm and the courts have proven many times over that a manufacture can be held liable for something even if they didn't design it to be used in that manner. Case in point the lights, they are certified thru the DOT to meet certain requirements for a certain model year vehicle. When I was speaking with the lighting engineer before the lighting update came out that was one of topics we spoke about was all of the legal steps GM had to go thru to test, validate and then get .gov approval for the lights to be updated the way they did.

 

Plus in the end people will mod the system and then if they have issues will take it into the dealer and want warranty work and sadly since a lot of these systems are all tied together now messing with one system can have effects on the other systems. CANBUS is a huge driver of that is my guess since it is the communication protocol all of the modules use to talk back forth now.

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