Left Rear Turn Indicator Failure Message 2015 Yukon denali

[benjamminharris]

Hello, I got this message about on the dash for left rear indicator message. Would anyone know how to fix this issue? It is not a bulb. The company who sells the tail light said it’s nothing to do with their LED light so won’t sent a new one. The flashers blink correctly. This particular light last summer was brighter then the other one and the dealer reset the fuse block. Any fix for this?

 

[Joseph Garcia]

I'd switch the left and right LEDs and see if the error message stays the same, or converts to the other side of the truck's directionals. If the error changes, then you have some more convincing data to discuss again with the seller.

 

[benjamminharris]

I'd switch the left and right LEDs and see if the error message stays the same, or converts to the other side of the truck's directionals. If the error changes, then you have some more convincing data to discuss again with the seller.

Thanks. I’ll give that a try and report back. The flashers blink in sync together fine, it’s just that left rear blinker. I’ll see if I can plug the right side one into left one and see what happens.

 

[Doubeleive]

Thanks. I’ll give that a try and report back. The flashers blink in sync together fine, it’s just that left rear blinker. I’ll see if I can plug the right side one into left one and see what happens.

FLASHERS work no matter what the ohm's are. so that is not a accurate test.
you should be able to swap left/right and see if the message follows, it obviously will not mount
the error on the k2's is canbus, it could just be mild corrosion/poor connection, or the ohm's are not reading correctly from the aftermarket housing.
try a little sandpaper on the fuse legs also if nothing else works.
if that light housing has a obvious resistor on it you can ohm test and replace it if reads 0.0 or less than 5ohm's , sometimes they are internal on a board though and are not so easy.
typically you will get hyperflash on that side after 3 regular blinks if it has completely failed.

 

[CMoore711]

When you say “the company that sells the tail light…”

Did you replace them with OEM tail lights?
Are the tail lights aftermarket?
Did you replace both passenger and driver side tail lights?
Did this message only come up when you replaced the left driver side tail light?

I know that since you have a k2 Yukon That the turn signal is built into the assembly, it’s not a swappable or serviceable bulb.

Give us some more info man.
Help us help you!

 

[benjamminharris]

When you say “the company that sells the tail light…”

Did you replace them with OEM tail lights?
Are the tail lights aftermarket?
Did you replace both passenger and driver side tail lights?
Did this message only come up when you replaced the left driver side tail light?

I know that since you have a k2 Yukon That the turn signal is built into the assembly, it’s not a swappable or serviceable bulb.

Give us some more info man.
Help us help you!

 

[benjamminharris]

The company is Circuit Board Medics. They claim they are OEM brand new lights. This is the second tail light that they say is brand new OEM replacements. Whoever owned my ride before hacked the first time and soldered. I sent core in and circuit board medics sent me a new tail light last Jan. This summer it was brighter then right side so dealer messed around for 6 hours and chased wires blah blah blah, reset fuse block for $600 and it dimmed down. The other day the message just randomly came on the dash for blinker. It’s led not a bulb for blinker. They don’t want to send a new light because they don’t think the light is bad

 

[benjamminharris]

Both tail lights are new within the last year and Circuit Board Medics claims they are OEM. Whether they are I have no idea. Too bad it’s not a bulb, it’s just another headache I have to have with this P.O.S

 

[Fless]

The company is Circuit Board Medics. They claim they are OEM brand new lights. This is the second tail light that they say is brand new OEM replacements. Whoever owned my ride before hacked the first time and soldered. I sent core in and circuit board medics sent me a new tail light last Jan. This summer it was brighter then right side so dealer messed around for 6 hours and chased wires blah blah blah, reset fuse block for $600 and it dimmed down. The other day the message just randomly came on the dash for blinker. It’s led not a bulb for blinker. They don’t want to send a new light because they don’t think the light is bad

Forum Tip: feel free to add your content to the same post after you quote another member's post. Doing that helps keep things related together.

 

[benjamminharris]

I'd switch the left and right LEDs and see if the error message stays the same, or converts to the other side of the truck's directionals. If the error changes, then you have some more convincing data to discuss again with the seller.

Yup. I just did that with swap. Still blinks fast. Disconnected battree and hooked it back up. Still no change. I know the last time my tail light was brighter the dealer reset the fuse block and changed $609. But not sure that would do anything. The lights and flashers all work fine, and reverse bulb. No corrosion. I don’t think a fuse would be issue.

 

[Doubeleive]

Yup. I just did that with swap. Still blinks fast. Disconnected battree and hooked it back up. Still no change. I know the last time my tail light was brighter the dealer reset the fuse block and changed $609. But not sure that would do anything. The lights and flashers all work fine, and reverse bulb. No corrosion. I don’t think a fuse would be issue.

that means it is not the lamp assembly, try changing the front bulb just for kicks, if it is led bar in the front then scratch that.
maybe go under the rear bumper and check/clean the connector that ties into the main harness if there is a poor connector or corrosion there that could be the problem.
generally the harness that connects to the light housing is a pig tail that is about 24" long or so and then it connect to the main harness under the bumper

 

[benjamminharris]

I wonder how much of a pita it is to change the front bulb. Knowing GM I probably have to take the whole bumper, cab, grill, 3 doors, and all four tires off the vehicle. The. Message is rear turn on the dash. The blinker sound is Bcm but I was reading there are fuses apparently. Even thought it’s led. I wonder how hard it would be to reset fuse block like the dealer did or if they do something special.

 

[Fless]

To be clear, when you swapped the light to the other side, did the error stay on the same side? In other words, does it seem to be be an error before the light fixture itself?

Is this "reset" the dealer did a type of programming? Or removal and reseating of the fuse block, as in just a physical reset?

 

[Doubeleive]

I wonder how much of a pita it is to change the front bulb. Knowing GM I probably have to take the whole bumper, cab, grill, 3 doors, and all four tires off the vehicle. The. Message is rear turn on the dash. The blinker sound is Bcm but I was reading there are fuses apparently. Even thought it’s led. I wonder how hard it would be to reset fuse block like the dealer did or if they do something special.

if it is a bulb only in front it is not hard to do, if it is led bar forget it, you can tell by turning on the blinker and looking at it.
usually the canbus is correct, left rear. it would be easier in either case to check that rear harness under the bumper
you'll just get a little dirty, put some glasses on. their tends to be plenty of dirt and road grime under there which will go right in your eyes

 

[benjamminharris]

if it is a bulb only in front it is not hard to do, if it is led bar forget it, you can tell by turning on the blinker and looking at it.
usually the canbus is correct, left rear. it would be easier in either case to check that rear harness under the bumper
you'll just get a little dirty, put some glasses on. their tends to be plenty of dirt and road grime under there which will go right in your eyes

if it is a bulb only in front it is not hard to do, if it is led bar forget it, you can tell by turning on the blinker and looking at it.
usually the canbus is correct, left rear. it would be easier in either case to check that rear harness under the bumper
you'll just get a little dirty, put some glasses on. their tends to be plenty of dirt and road grime under there which will go right in your eyes

So 43 is fuse but not sure about changing it. Blinker gets power. I’ll mess with the wire under it. I’ve messed with it before. The reason I don’t think it’s bad is because everything else on the light works fine. When I swapped lights there was no corrosion or anything who knows road salt could get up there. I’ll mess around and report back

 

[Doubeleive]

So 43 is fuse but not sure about changing it. Blinker gets power. I’ll mess with the wire under it. I’ve messed with it before. The reason I don’t think it’s bad is because everything else on the light works fine. When I swapped lights there was no corrosion or anything who knows road salt could get up there. I’ll mess around and report back
View attachment 478916

nope 40 is the left turn signal combo trailer stop/left signal
this what i mean by screwy gm crap
39 is right side
you can verify by pulling the fuse and see if the blinker still works, in case that is for trailer use only.

 

[LSCALADE]

Here is a neat site that shows you all the fuses.

2020 Chevrolet Suburban fuse box diagram - StartMyCar

www.startmycar.com

 

[Loki223]

So first off, let's jump back to the basics. Circuit board medics is a repair shop. and they charge a core charge on those lights. They also sell the "new" "gm" lights at less then half the price of GM websties. That leads me to believe those lights are reconditioned lights, not new.

Secondly, the rear tail lights i believe have identical connectors don't they? swap the tail light assemblies. See if the problem follows the assembly, or stay on the left side. that will tell you if the issue is with the light or the truck..

If the problem follows the light, that's your issue. Replace 'em with some Morimoto Esky style lights and be done with it. I have them on my burb, and it's not a hard install at all, and honestly, looks way better then stock. Although the yukons did get better tails then the burbs did