C8 Upgrade
Drifting
Joined: Jan 2014
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From: Cincinnati OH
Thread Starter
2nd Gear
Joined: Aug 2024
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Melting Slicks
Joined: Aug 2009
Posts: 3,049
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From: Schaller Iowa
I don't think HUD can be added and probably not heated seats as it'd require a different wiring harness, programming (if that's even possible) and the buttons would have to be added 😆
Le Mans Master
Joined: Dec 2013
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From: Charles Town WV
2024 Corvette of the Year Finalist - Modified
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Its for sure possible, the parts, harnesses, and programing exist. The hard part is finding anyone willing to do it. GM doesn't just let their techs into that side of the software so you'd have to find someone with a work around to program the HUD. Heated seats may be easier but you'd need to buy a set of heated seats, the buttons, and the harnesses. The HUD is going to be a hard one though. I'd say ditch it and buy a car trimmed the way you want or learn to live with not having those two features.
Racer
Joined: Jan 2021
Posts: 371
Likes: 349
From: Barrie, Ontario, Canada
not possible....different wire harnesses for the extra options. You would have to basically gut the car and replace the Main Wire harness (among other parts) which would be pretty much impossible to do yourself, or even a mechanic wouldn't be experienced enough to do so.
Le Mans Master
Joined: Dec 2013
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From: Charles Town WV
2024 Corvette of the Year Finalist - Modified
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not possible....different wire harnesses for the extra options. You would have to basically gut the car and replace the Main Wire harness (among other parts) which would be pretty much impossible to do yourself, or even a mechanic wouldn't be experienced enough to do so.
Racer
Joined: Jan 2021
Posts: 371
Likes: 349
From: Barrie, Ontario, Canada
LOL, ok, whatever you think......I worked in an Automotive factory for 30 years....For 1 particular model for example, we would have about 7 different harnesses depending on the grade of the car. It would be 'dumb' as you put it for any company to have 1 harness will all the different couplers needed for all the options when the consumer isn't paying for those options, but the cost is still there to have the couplers available....but, think what you want!! LOL
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Le Mans Master
Joined: Dec 2013
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From: Charles Town WV
2024 Corvette of the Year Finalist - Modified
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I dunno about c8 specifically but I do know alot of manufactures do this to cut cost.
Racer
Joined: Jan 2021
Posts: 371
Likes: 349
From: Barrie, Ontario, Canada
It's the opposite....They are not cutting costs by making the most expensive Harness wth all options available and using this harness in all different grades of vehicles....Typically the highest grade (all bells and whistles) of car is never the most popular in regards to sales, so it would be idiotic to make this harness for all cars when only a small % of cars will actually need this part.....
CF Community Team
Joined: Nov 2005
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From: Charlotte N.C.
I put a HUD projector and the buttons in my C6. It was all plug and play. Had to loosen the whole dash and because I’m a slow methodological worker it took most of the day but it wasn’t hard.
I have never swapped seats but I bet the wiring is there for them too.
I have never swapped seats but I bet the wiring is there for them too.
Race Director
Joined: Aug 2016
Posts: 12,760
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From: Garden Valley CA
I doubt the harness is there for the heated seats and HUD. People have found that the wiring harness is different for the 1LT vs 2LT/3LT rearview mirror when they went to tap into it for a power source. And even the NPP cars vs non-NPP cars have different harnesses for the exhaust valves. But fixing the wiring would be trivial compared to getting the car's computer to accommodate the changes.
There were posts in the tech section from people having problems switching seats on a 2LT/3LT when the seats had all the same features.
There were posts in the tech section from people having problems switching seats on a 2LT/3LT when the seats had all the same features.
Last edited by RKCRLR; Aug 28, 2024 at 10:59 AM.
Le Mans Master
Joined: Apr 2018
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From: Dove Mountain, AZ
2023 C8 of the Year Finalist - Unmodified
The only way to get what your lasking for is to have purchased a 2LT...
Both the wiring and control software to operate HUD and seats for example is simply not available / accessible in a 1LT....
Both the wiring and control software to operate HUD and seats for example is simply not available / accessible in a 1LT....
Drifting
Joined: Jul 2017
Posts: 1,362
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From: Kingston, Ontario
LOL, ok, whatever you think......I worked in an Automotive factory for 30 years....For 1 particular model for example, we would have about 7 different harnesses depending on the grade of the car. It would be 'dumb' as you put it for any company to have 1 harness will all the different couplers needed for all the options when the consumer isn't paying for those options, but the cost is still there to have the couplers available....but, think what you want!! LOL
The new Colorado can be optioned to not have cruise control. The truck has everything it needs to use cruise control except for the steering wheel which has blank buttons. It can be swapped to a wheel with buttons and programmed to recognize that is now has cruise control.
Sometimes its cheaper for a manufacturer to just use one component in every vehicle rather than make 5 different versions for vehicles that were not ordered with an option due to economy of scale.
CF Community Team
Joined: Nov 2005
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From: Charlotte N.C.
As I said the wiring was there for the C6 so I have to think it’s a good possibility it’s there for the C8.
Mike what car did you assemble those 30 years? You said you worked in a plant, what did you do?
Mike what car did you assemble those 30 years? You said you worked in a plant, what did you do?
Instructor
Joined: Jul 2024
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From: USA
I say just trade out of it, because you would be wasting too much money trying change it. Just trade it, and grab a 2LT. You will get A LOT more than what you want for your money.
Drifting
Joined: Oct 1999
Posts: 1,622
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From: Export Pa.
It's the opposite....They are not cutting costs by making the most expensive Harness wth all options available and using this harness in all different grades of vehicles....Typically the highest grade (all bells and whistles) of car is never the most popular in regards to sales, so it would be idiotic to make this harness for all cars when only a small % of cars will actually need this part.....
Drifting
Joined: Jul 2012
Posts: 1,270
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From: Kiln MS
It’s exactly what held me up from buying used for a few years. I could never find a car with the options, color, mileage and completed the required maintenance per the manual (DCT Filter). So after 4 years I just bought what I wanted from MacMulkin. The 8k off also helped me make my decision. Sell the car buy something with the options you want. Pretty easy really.
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I would agree that selling your 1LT and getting a 2LT would be an easier and probably more cost effective way to go.
Race Director
Joined: Mar 2007
Posts: 11,360
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Do the research for yourself. You can look look at the on line parts sellers for the wiring harnesses of interest. I have done that in the past when other have asked questions about specific options - and I can tell you there are different harnesses for different options. Whether or not its true for the specific options you interested in - I do not know. But based on my research I would not conclude that they all have the same harness in general.
Last edited by Andybump; Aug 28, 2024 at 07:11 PM.