Jump to content

Adding mirror turn signals?

todd308

By todd308
in Modifications, Wheels & Tires

 Share

Recommended Posts

todd308 Enthusiast

todd308

Posted
Posted

So sadly while packing everything under the sun into the 2020 1500 mirrors it seems turn signals lost out......no idea why, cost cutting most likely.

 

That being said, has anyone tried to add turn signals to the factory mirrors?   Seems like at least there's the capability for them as the optional tow mirrors have turn signals in them, but they do require a new door wiring harness so perhaps that would need to be added as well.  It might also require programing as it says for the optional tow mirrors the BCM has to be reprogrammed, but it's hard to say if that's for turn signal function or something else. 

 

Don't really need them, just thought it might be an interesting mod if it doesn't require giving a dealer $$$ to reprogram a BCM and the wiring hookups are there. 

TA^Guy Enthusiast

TA^Guy

Posted
Posted

This is something I've been interested in since I test drove the new trucks last year.   I would like the signal integrated with the work light on the back of the mirror but use separate amber LEDs in the housing.  I would also like the signals on the mirror side which I miss from my 2015.  On the highway I hit the signal to change lane, look in my mirror and wonder if they were actually on or not.  The 'click' from the signal is so faint I can't hear it, and now there is no visual signal in the mirror so I never know if I tapped the stalk enough or not.   Not to mention, I liked the signal on the side since I tow a 30' trailer and it helps others see when I'm signaling to change lanes.   

 

No, I really don't want the tow mirrors.  I think they are horrible looking and I don't need to mammoth things every day, but I must admit I do like all the features they offer. 

 

Any insight if the harness for the signals are already there and functional would be very helpful. :)

todd308 Enthusiast

todd308

Posted
  • Author
Posted

I emailed Boost on this since they have some mirror wiring harnesses and mirrors they do for the 2019+ Sierra's to see if they have any input on what is needed. 

 

It sure seems like the small mirror caps would be a perfect platform to add turn signal LED strip lights to and a kit that does something like that would be right up their alley. 

 

I'll post what I hear back.

aragrev7 Enthusiast

aragrev7

Posted
Posted
57 minutes ago, todd308 said:

I emailed Boost on this since they have some mirror wiring harnesses and mirrors they do for the 2019+ Sierra's to see if they have any input on what is needed. 

 

It sure seems like the small mirror caps would be a perfect platform to add turn signal LED strip lights to and a kit that does something like that would be right up their alley. 

 

I'll post what I hear back.

I’m in for that! I agree it’s missing on my AT4. Haven’t been without it since 2005 on my vehicles

todd308 Enthusiast

todd308

Posted
  • Author
Posted (edited)

Unfortunately their only response was that they have no plans to offer anything, but would pass along the interest to the engineers.  So I guess for those that read this give them an email and if there's enough interest maybe they'll make something.  I had hoped they might have some info as to what is needed to do the upgrade but no luck there.

 

I still think a set of mirror caps that had plug in capability to add turn signals would be a good seller. 

Edited by todd308
Vigilante375 Enthusiast

Vigilante375

Posted
Posted

I looked at adding turn signal mirrors and found videos from the last gen truck where people would just plug in another truck trims mirrors and it would work. Because the wiring is already there and works with nothing other than plugging it in. 

 

Yes I know the fog lamps have to be programmed in, which is stupid but oh well. 

 

https://www.gmpartsclub.com/oem-parts/gm-exterior-mirror-covers-84328136?origin=pla&utm_term=&utm_campaign=Catalog+Smart+Shopping&utm_source=adwords&utm_medium=ppc&hsa_acc=1931327731&hsa_cam=9158758542&hsa_grp=87904691250&hsa_ad=414787673482&hsa_src=u&hsa_tgt=pla-293946777986&hsa_kw=&hsa_mt=&hsa_net=adwords&hsa_ver=3&gclid=CjwKCAjw_sn8BRBrEiwAnUGJDs4fQh5ViMQ2QUI2y-VeqvK0HsVD038KteXySXMYquGNM48VcniP9xoCMzIQAvD_BwE

 

Aren't these turn signal mirrors from the Trail Boss? I don't see why they wouldn't plug and play if the wiring is already there. 

 

Hasn't that been found to be true for those wanting to add the factory bed camera?

Rob Mugs Enthusiast

Rob Mugs

Posted
Posted
2 hours ago, Vigilante375 said:

I looked at adding turn signal mirrors and found videos from the last gen truck where people would just plug in another truck trims mirrors and it would work. Because the wiring is already there and works with nothing other than plugging it in. 

 

Yes I know the fog lamps have to be programmed in, which is stupid but oh well. 

 

https://www.gmpartsclub.com/oem-parts/gm-exterior-mirror-covers-84328136?origin=pla&utm_term=&utm_campaign=Catalog+Smart+Shopping&utm_source=adwords&utm_medium=ppc&hsa_acc=1931327731&hsa_cam=9158758542&hsa_grp=87904691250&hsa_ad=414787673482&hsa_src=u&hsa_tgt=pla-293946777986&hsa_kw=&hsa_mt=&hsa_net=adwords&hsa_ver=3&gclid=CjwKCAjw_sn8BRBrEiwAnUGJDs4fQh5ViMQ2QUI2y-VeqvK0HsVD038KteXySXMYquGNM48VcniP9xoCMzIQAvD_BwE

 

Aren't these turn signal mirrors from the Trail Boss? I don't see why they wouldn't plug and play if the wiring is already there. 

 

Hasn't that been found to be true for those wanting to add the factory bed camera?

Sure as heck looks like it.  I bought a strangely optioned truck.  Has every single option BUT the lane keep assist/old lady warning sensors/mirrors.  Not sure why for the extra 800 bucks they skipped but could be lack of parts during the Rona?

That's not a bad price if they're plug and play

BluegrassMotorsport Enthusiast

BluegrassMotorsport

Posted
Posted
3 hours ago, Vigilante375 said:

Aren't these turn signal mirrors from the Trail Boss? I don't see why they wouldn't plug and play if the wiring is already there. 

 

Hasn't that been found to be true for those wanting to add the factory bed camera?

Those aren't turn signal mirrors although they look like they should be. I have them on my RST and I thought the same thing. Turns out they came with the safety package and they're essentially LED spotlights. Pretty darn bright but can only be used in Park. I haven't found a use for them yet but they're neat. You can turn them both on or each mirror individually. 

Vigilante375 Enthusiast

Vigilante375

Posted
Posted
12 hours ago, BluegrassMotorsport said:

Those aren't turn signal mirrors although they look like they should be. I have them on my RST and I thought the same thing. Turns out they came with the safety package and they're essentially LED spotlights. Pretty darn bright but can only be used in Park. I haven't found a use for them yet but they're neat. You can turn them both on or each mirror individually. 

Well that's a bunch of crap. Glad to know what they do. 

 

Wish that those would have been turn signals. Oh well. 

  • 3 weeks later...
TA^Guy Enthusiast

TA^Guy

Posted
Posted (edited)
On 10/23/2020 at 3:14 PM, todd308 said:

 

It sure seems like the small mirror caps would be a perfect platform to add turn signal LED strip lights to and a kit that does something like that would be right up their alley. 

 

I'll post what I hear back.

I'd rather have a replacement for the spot light that has spot light and turn signal in the same lens rather than a separate light in the mirror cap.  Tempted to find a cheap used one on EBay to experiment with.

Edited by TA^Guy
todd308 Enthusiast

todd308

Posted
  • Author
Posted

True that would be a very clean way to do it and honestly aside for another cost cutting step I can't see why they didn't include it.

 

The only thing that's been holding me back so far is the unknown of what is needed and the expense.    Both if the new door wiring harness is needed which is required for the towing mirrors and/or if the ECM needs to be reprogrammed.  

  • 2 months later...
Juddmann Enthusiast

Juddmann

Posted
Posted

So i have a 2021 sierra with the spot lights on the front mirrors and from what im reading theres no work around just being used in park. I havent modded much since my 04 avalanche so Im sure a lot has changed since then. Seeing there isnt much use for the spot lights and more function with turn signals why not rewire the connection points. Pull the pin for the spot light on the mirror side of the harness and run that to the turn signal wire and tap off of that? Not sure how far that would be for each mirror or if there's a wire in the harness already.  For a little bit of work and some wire its a cheap easy work around. There's a mod you can buy for the auto stop start switch that remembers the switches position but damn pricey. Maybe they will have a mod for the spot lights but still need to bypass park too lol. Signals sound way easier and cheaper. 

BluegrassMotorsport Enthusiast

BluegrassMotorsport

Posted
Posted
10 minutes ago, Juddmann said:

So i have a 2021 sierra with the spot lights on the front mirrors and from what im reading theres no work around just being used in park. I havent modded much since my 04 avalanche so Im sure a lot has changed since then. Seeing there isnt much use for the spot lights and more function with turn signals why not rewire the connection points. Pull the pin for the spot light on the mirror side of the harness and run that to the turn signal wire and tap off of that? Not sure how far that would be for each mirror or if there's a wire in the harness already.  For a little bit of work and some wire its a cheap easy work around. There's a mod you can buy for the auto stop start switch that remembers the switches position but damn pricey. Maybe they will have a mod for the spot lights but still need to bypass park too lol. Signals sound way easier and cheaper. 

Boost has a harness that will turn the spotlights on with the high beams. Not very pricey either and pretty easy to install. I don't know how bright they would be on the road at night. I've never tried them outside my driveway. But it could be a cool addition. 

gemarsh Senior Enthusiast

gemarsh

Posted
Posted
On 10/19/2020 at 1:16 PM, TA^Guy said:

This is something I've been interested in since I test drove the new trucks last year.   I would like the signal integrated with the work light on the back of the mirror but use separate amber LEDs in the housing.  I would also like the signals on the mirror side which I miss from my 2015.  On the highway I hit the signal to change lane, look in my mirror and wonder if they were actually on or not.  The 'click' from the signal is so faint I can't hear it, and now there is no visual signal in the mirror so I never know if I tapped the stalk enough or not.   Not to mention, I liked the signal on the side since I tow a 30' trailer and it helps others see when I'm signaling to change lanes.   

 

No, I really don't want the tow mirrors.  I think they are horrible looking and I don't need to mammoth things every day, but I must admit I do like all the features they offer. 

 

Any insight if the harness for the signals are already there and functional would be very helpful. :)

 

28 minutes ago, BluegrassMotorsport said:

Boost has a harness that will turn the spotlights on with the high beams. Not very pricey either and pretty easy to install. I don't know how bright they would be on the road at night. I've never tried them outside my driveway. But it could be a cool addition. 

I have that kit. Really brightens the road ditches up on country roads. Kit maintains the oem functions of the switch when brights are off.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • newdude
      Can anyone decode a VIN to determine if this truck has had emissions issues or a recall?

      By newdude · Posted

      I see some red flags.   - No mention in the Carfax if the oil pump belt was changed.  LM2s had a 150,000mi service interval, and its got 164,245mi on it.  So right out the gate it needs about $3000-3500 for that to be done before driving it another 150,000mi.  Belt is at the rear of the engine.     - If something happens to the transmission valve body, the special coverage is expired by mileage.  That will likely be an out of pocket expense, with zero or near zero GM participation if something happened even though its in by time.   - 2020 LM2s seem to need timing chains after 80,000mi at some point.  They fixed this end of 2020/starting 2021 model year engines.  They will usually set a P0016 I think?  There is another $8000-10,000 if it needs a chain.  The main chain is at the back, secondary at the front so the pump belt would be done at the same time if it needed chains.     - Long oil change intervals.  7,000-8,000mi on average, probably close to 0% or perhaps to or beyond 0% on the OLM.  Lots of them not at the dealer which makes me wonder how much of the oil ran through that truck was the proper Dexos D rated 0w20 oil and not just gas engine 0w20, which is not the same at all.     - Long fuel filter changes, again likely taking the fuel filter life to 0% or more.  First one went 28,603, second was done 43,094 miles later at 71,697, from there another 46,452mi to 118,149mi, and then the most recent one 37,026mi later at 155,175mi.  So counting its original fuel filter, its had only 4 fuel filters on it.  No bueno IMO.         Good news?    - It has had only two warranty trips to the dealer.  The first free service (end of December 2020 on the Carfax), and the transmission reprogram recall (end of August 2025 on the Carfax).     - Truck did a LOT of moving, so that might explain the lack of emissions related repairs like bad NOX sensors, bad exhaust temp sensors, bad glow plugs, etc.         The "emissions system checked" could just be how something was flagged for Carfax.  GM dealers have to do SAVI reports for warranty repair orders so they scan the truck.  So its possible that is there for that?  
    • cherryred21duramax
      Can anyone decode a VIN to determine if this truck has had emissions issues or a recall?

      By cherryred21duramax · Posted

      Thank you, @Z45!   NOTE - No all repair shop/Dealers reports to Carfax   That is my main concern.  The CARFAX looks way too clean for a 6 year old anything with 164,245 miles.  Even something known for reliability (like many Toyotas) typically has a lot more replaced, like a Nav screen, interior trim, shock/strut, or brake pads.  And surely the last set of tires (installed at ~58k miles) would be bald unless those were all highway miles.   I'm tempted to pay a local dealer to look up the VIN, but am not sure if that will be worthwhile.  Last time I did this, it was 100% useless, and I felt scammed - they noted the bumper was replaced years ago and that's it.  A 5-year old could spot the accident damage, even though nothing was on the CARFAX.   After giving the dealer a call, the truck may have a hard shift, but they have to verify with their mechanic if that's even a concern.  And I've test driven about a dozen of these now, many near Chicago, and half the trucks shift hard/odd at all throttle positions.  The ones with aftermarket lifts/larger tires shift terrible, and 3 stock trucks shifted so violently I thought the transmission valve body was going out.   At this point I'm conflicted, as I need a vehicle, and am coming up short locally.  Northern trucks in this price range tend to have either multiple owners, a lot of mods (lifts/oversized tires without re-gearing), and are generally in rougher shape.   If this truck showed up in your neighborhood for $27k and you had to purchase it sight-unseen, with the possibility of needing a 10L80 rebuild, torque converter, or rear end - would you do it?  I'm convinced most of the 10L80 trucks I test drove are broken, they can't all shift so bad, with massive flares/slipping/lurching and mis-matched downshifts like a teen driver learning stick.
    • Griffin Donovan
      2027 GMC Sierra Spot Shots + Undisguised Interior (BIG Changes!)

      By Griffin Donovan · Posted

      From the spy shots, the front end does look like it's borrowing some styling cues from the Canyon. I'm more interested in the powertrain news than the screens though. If the 3.0 diesel survives into the next generation, that alone will keep a lot of current owners interested.  
    • Tiffanyrose
      2001 chevy silverado security issue.

      By Tiffanyrose · Posted

      What is this tuner you mentioned that can shut the system off?
    • Tiffanyrose
      2001 chevy silverado security issue.

      By Tiffanyrose · Posted

      I had it tested at the hardware store, and it showed no chip. He went out to started the truck today and it wouldnt fire. He waited an hour then tried again, and it started 3 times. In a row. My 2000 cavalier did not have a chip key, but still had a security system.  🤷‍♀️

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...