GM Turn Signal Problem Fix - Directional Relay Replacement 

Left turn signal not working, been chasing this problem , this , is a confirmed fix!!! Thank you

The video was spot on! The only difficult part I encountered was removing the signal relay. It was more difficult to loosen and pull out than I expected.

Glad I found this video. I had a problem with my Silverado in which the right signal would work. But the left wouldn't. So even with the hazard lights only the right would flash. I installed this the same day I saw the video and it worked perfectly. Saved me big bills that mechanics were gonna charge me. Thank you!!

I would like to add that this was very helpful to me with a problem I had with a 2004 Chevrolet Silverado. The flashers on the Silverado would come on and off sporadically. Until I replaced the Directional Relay. Thanks for the great starting point.

Worked to fix my 1999 Chevy Silverado. Was just a different relay part than the one in the video. I used a "EP29 Electronic Flasher" and fixed my turn signals no problem. Thanks for the video!

THank you very much for this video! 1) It confirmed what was causing my turn signal problem; 2) I made the entire repair in less time than it would have taken just to DRIVE to the repair shop. 3) I saved hundreds of dollars in parts & labor. (part was only $40 on amazon)

Thank you for this video SteveO, my 03 Tahoe was experiencing the exact symptoms you described . Local dealership wanted 85 to diagnose and 110 an hour for labor, (whaaat!) Went to the local part shop and pickup up the relay for 70 bucks and less than 20 minutes in my labor and good as new. I especially want to say thank you because the wife won't be hounding me to fix it anymore!!

This fix worked perfectly! Problem symptom: When I put my left turn signal on, both right and left signal lights flashed (just like when you turn the hazards on). Changing this part fixed the problem. It took a total of 10 minutes to complete the repair. Thanks for posting this video! Saved me $100-$150 in repair costs.

Thanks for a great video - worked for our 2005 Yukon. I'm teaching my son that there are a lot of things you can fix yourself. In the old days, you just started taking things apart -with RU-vid it's way easier!

great video. I have a 04 Silverado with no right turn signal coming out of the pigtail for a trailer. This helped me tremendously. Btw, how can 23 people dislike this video? Straight,short, to the point! I have watched other car videos that were 10-20 minutes long and never said anything that was useful.

Just changed the ignition switch on my 2001 Chevy 2500HD Silverado and now my turn signals work when they feel like it. (started one week after) Thanks for the excellent video, in spite of your camera.

Thanks for making this video! I was having the same issues with my Yukon, and didn't know where to start trouble shooting. Well done.

My 2004 Chevy Suburbn was having problems with turn signals intermittantly. They would stop flashing when the brake pedal was pressed, and resume blinking after releasing the brake pedal. Also found that cruise control would sometimes disengage if I used a turn signal. I just replaced the flasher repay per this video and problem solved! Thanks for the video Steve O!

I had a slightly different problem when I hit the brakes, the left turn signal indicator (dash) would light up and stay solid. My left hand turn signal on the drivers side mirror would also light up when i hit the brakes. I bought this part and viola, ITS FIXED!!!! I have to cancel my appointment at the mechanic now!!! I've been trying to fix this myself for a month and finally found this video! THANK YOU THANK YOU THANK YOU!!! Awesome video and straight to the point. Took me less than 10 minutes. 2003 Yukon Denali 6.0 gas. I got part on Amazon for about $50. IDK who gave you thumbs down but they suck at life:)

Thanks Steve O. With this video I was able to swap out the flasher relay in about 20 mins. It took longer to find one at a local parts store than to complete the job. So far so good. My 4 ways came on when I used the left turn signal in my 2003 Tahoe

The video is simple and gets to the point. The only change I would make, before putting the trim panels back on, make sure the turn signals work. Knowing Murphy's law, if I put all the panels back on, it won't work, On the other hand, if the signals still don't work, would would a person do next? I have a 2001 suburban , the four way flasher works ok but the turn signals stopped working. I'll order the relay and replace it. Thanks, well done.

I watched this video not sure if I could tackle this or not but I saw it wasn't as daunting as I thought it would be . The only suggest I could make after trying to pull the switch out for 30 minutes in my 2005 GMC Sierra with my fingers is skip the congested area and use water pump pliers .....

Excellent video. My driver side turn signals, front and back, were both flashing as if they were burned out. Replaced the bulbs. Same thing. Then i came across this video and it solved my problem. Thank you.

It is more commonly referred to as a TURN SIGNAL FLASHER at your local auto parts store. Part Number LM487 at Autozone or Part Number FC563 at Advance or O'Reilly. It will cost a bit more, but you won't have to wait on shipping. Great video though. P.S. In many cases, the flasher can be repaired. (It's just corrosion.)

It worked yahoo i got mine at autozone $43.99 dealership $97 bucks took me 15 minutes 04 Tahoe 4x4 same set up as 03 in Video Thanks a million

Thanks for the video, I love posting videos of things that can help other people, especially when I can't find one on You Tube. You are the only one I found that is really addressing the issue of my 2002 too 2006 Silverado. I recently started upgrading my truck to LEDs and have to change the electronic lighting control module. (Blinker relay) I found mine for $30 brand-new in package, "delivered" on Amazon from the manufacturer (Novita). It's part number LM 487 The video was definitely helpful. Thanks again

Ur the bomb Steve O, took me longer to run to NAPA to get the part than installing it. 30 BUCKS for the part & a little elbow grease!

Thank you. It literally took me 5 minutes to replace the relay from start to finish. And I'm a lawyer--not a mechanic. Great video.

45 "thumbs down" for this video? What the hell? Haters gonna hate. Great video Steve O. Fixed my wife's 2004 Suburban in 10 minutes. She's happy. Saved $$$. Win-win. Keep up the great work.

Thanks!! Been driving around with a left turn signal that would flash like crazy or just didn't flash at all. Thought it was a larger issue with the electrical, but this solved the problem and only took about 10 minutes to replace.

My turn signals would just turn on and not blink. This fixed the problem! Thanks

Husband just replaced mine🎉 Thank u very much your video was very helpful ❤

Steve thanks a lot for the video it was very useful. .... mine is doing the same left turning doesn't work only the right. .... now I know how to fix it , thanks Steve. ...

This worked great. My truck lights worked fine but my trailer lights went haywire. The left signal light worked OK but when I switched to the left both lights flashed. When the brakes where applied only the right light came on. Replacing the flasher module fixed it all.

When I use either turn signal, the clicking won’t stop. It’s driving me crazy. Thanks dude!

Thank you so much for this video. I was told when I had my back up camera installed that the top was glued. But, with your video, I kept trying, and the trip came out w/o a problem. Also, the relay was an issue, but you said it might be, so I kept at it, and all went perfectly. I literally do not think I could have done it w/o this video. Thanks!

Thank you very much for sharing, awesome video. In may case your video helped me locate the turn signal flasher in my 2006 GMC Sierra. I replaced all of the incandescent running lights with LEDs and the turn signal went hyper. I found a direct replacement (plug and play) Turn Signal Flasher on eBay. I do not have the part yet. I will update you after I install the part.

Not sure if it will be a permanent fix, but I just opened the plastic case on the relay and cleaned the contacts with some contact cleaner and reinstalled. Fixed the problem without an $80 part!

Thanks, dude! Your video saved me some money.

Thanks for the video because I'm having this problem now with my 2005 Chevy Tahoe

Thanks SO much! Worked perfectly!! My problem was that the blinker on my '04 Yukon XL was just clicking really fast when turned on, and the blinker indicator was not lighting up. Such an easy fix following your instructions! Excellent job on this video!

I just wanted to say Thank you Steve O for this video. It helped me out. I fixed my 2003 Tahoe that had this problem.

Thank you so much for this video. I was able to replace the relay and now both of my turn signal work properly.

worked on my 05 chevy avalanche, that had a left blinker/fast blinker some times. only took about 7 minutes and some cussing and swearing to get out the actual old module. thanks a bunch!

This fixed the problem. Issue was right signal wouldn't come on. I installed it myself took a few minutes. I'm a lady with acrylic nails and I didn't break one. Just follow the video. Part at pep boys was 79 bucks. Amazon with prime 2 day delivery was 48. I have a 03 Tahoe.

Thank you for your simple and helpful video just got mine done on my 2005 avalanche ✅

Thanks for the help man just changed mine ,solved my blinker problem...right side wouldn't work ...easy fix

Good video. I'm chasing an intermittent blinker problem. Luckily, the dash is easy to get into on these trucks.

83.00 dollars at autozone whent to the junk yard "accidentally fell in to my pocket works like a charm. great video helped me allot.

I initially was only looking for the location but ended up watching the whole video. I'll have to get a flasher relay and put it in. 2 questions though. 1. Wouldn't you recommend people testing the turn signals before putting the panels back on? 2. What in the world are GM engineers smoking that makes them want to locate items that require removing half the dash to gain access to them?

Thanks for posting your video. You saved me a trip to the mechanic and lots of $$. I followed your instructions and it worked! Thanks again bro

Thanks for taking the time, real informative fixed my problem!

Saved me from buying the multi function steering column stalk. Thank you for the help.

The right turn signal in my 2003 Suburban reliably works but the left turn signal only works sometimes. Sometimes I need to turn the left signal on and off 3 times before they work, sometimes it takes more than that. Also sometimes I need to turn the steering wheel (at a stop at an intersection) a good bit to the left before they will work and stay flashing.

Thanks for the video. Changed mine out today and fixed the problem.

It’s fun watching videos like this, in my opinion. It’s good to know how to fix older parts in older cars even though my car is a 2015 Buick Encore, which doesn’t use any clicker for the turn signals. It has electronic turn signals on it which are cool. But mechanical turn signals are cool too, in my opinion. I think most GM vehicles, older and newer models, are cool in their own ways.

Great video. Hi steve I have a question. I have a 2004 chevy tahoe I installed after market Led Tail lights. And at night I'm unable to drive the car because with the headlights being on. My tail lights stay off. I don't get it. If I hit the turn signal the signals work but they blink fast. If I hit the break light it works fine If I go reverse my led bulbs work fine. But when the car is on at night and the headlights are on. My tail lights stay off. Do you think replacing the Flasher Module can help solve this issue.

Awesome video. Answered all my questions. Easy fix. Thanks

Great video. Thank you for taking the time to make it.

On my 2001 Silverao my signals don't work when my lights are on nighttime. You thid relay is bad? All lights on the side seem okay?

Good video I took a gamble on buying the part and it worked much appreciated !!!

our problem was no turn signal on both rear, side lamp and fronts flashed twice as fast. checked flashers, wiring grounds , bulbs ,all the above. no cure of problem. I work in a chevy dealership, they were scratching their heads. I work in the body shop. not a wiring problem fixer. I had several left over wiring harnesses from tail lamp replacements. plugged one in. bingo, left turn worked . tried the right one bingo, it worked. only problem, wasn't correct wiring as it had no side lamp. so I figured it was from the harness back and that left the sockets as wiring looked good. started to check sockets, from the top. it looked not correct down inside, metal connector contact points looked irregular. pried with a small straight screwdriver and pried gently around until looked like other prong. then looked at bulb. it had the 2 wires on each side. held the wire down at the loose end and gently pried a small rise in the wire, reinstalled bulb and plugged wiring back it. . bingo, worked like new. did same to other side and it fixed it also. hope this works for you because this is very frustrating when you try everything and still no cure.

I have replaced both my front and rear turn signals with LEDs and I have a Novita LM579 flasher equipped. My problem is when my headlights are on, both turn signal indicators light up and the turn signals stay on the high setting and dont respond when I go to use them or even the hazards. However, everything works when my headlights are off. Possibly a defective flasher? My truck is a 2003 2500HD.

I actually needed this help because I'm having the same problem. Thanks.

Thank u much ill be doing this in the snow we are having today and will be upgrading my rear tail lights to LED Today

Great tutorial and a real time saver

Great job with the video all with one hand.

Glad I found this. Thank you so much for posting.

Worked perfectly. Thanks for sharing.

Thank you for sharing, great video.

On 2004 Yukon there is a ground wire behind driver side rear tire that goes from the chassis to up near the gas filler cap area. If it is broke rear blinkers wont work along with other strange electrical problems.

Quick question.... so on my 06 tahoe, i replaced the tail lights with LED taillights. all lights work, running lights, brake lights, reverse, right turn signal, just no LEFT turn signal. i replaced the relay switch but to no avail. what could the issue be?

My Silverado turns on the brights when signaling a right turn, would this relay fix my truck

This helped me tremendously! Thanks

How did you replace the actual time in the OD dash meter? I have a suburban too and I would like to know.

I accidentally was messing with the ground of the signal light plug with a metal picking tool while the turn signal was on and forgot to turn it off before all of that. Now it won't blink or flash. Did I static shocked and burnt the turn signal relay?

I have a 1999 Chevy Tahoe with no turn signals, all fuses are good and all other lights are working including hazards and break lights. Does the 1999 Tahoe have the same directional relay as you have shown on the video?

Great video. I have a 2006 GMC Sierra that has a problem. Whenever I'm driving at night, and turn on my right blinker, the brights come on. Never does it when I turn on the left blinker. And never does it during the day. It doesn't do it all the time. But will do it several times a night. Any idea if replacing the relay will fix this?

Great vid. Thanks. Ps I drive only chevy now. but im just so frustrated with the electrical ive had 2 chev vans unfixable wireing shorts.

Hey bro, I started to get this problem when I put some led lights on my silverado. Will this fix it?

2006 Suburban... When my turn signals are activated (independently and 4 way), if i push my brake, the rear lights flash instead of the amber turn signal light. The turn signal just stays illuminated. I have narrowed it down to a directional relay, faulty multi switch or faulty turn signal/ cruise control switch. Do you think this relay is the culprit? Bulbs and fuses are new

my 1990 chevy truck turn signals dont flash on the dash but do outside, will this fix that?

My 99 escalade sounds as if my blinkers or hazards are on but they are not. When i hit the brakes the sound of the blinkers stop clicking. And when i put my right turn signal on sometimes it wont work. And also the back right tail light, the plastic on the light bult almost acts like it gets melted a little bit to where that hole tail light assembly stops working until i clean it out and change the bulb... would the relay cause this?

Steve I got a 2001 camaro z28 that I'm not getting power to the front passenger turn signal light. The back passenger turn signal light works like it should and hazards work fine but not the front passenger side. Ive traced to wire to the fire wall and there's no power to it. The front and back lights for the turn signal on the left side have different colors. The front is blue the back is purple iir. Do these two meet at the steering column switch? Do you think it could be the switch it self that's bad?

Thanks for the video! Worked great!

I have a 2005 GMC Sierra which seems to work, but when I turn on the right signal it flashes the right turn signal, but it also flashes the brake lights too and if I have the cruse control on it disengages that too. The dealership who replaced the hydro boost last year said it was not a connected issue but that is when it all started. Would the replacement of this part solve these issues?

Thinking mine is the flasher I’ve already had to replace it but now the signal on the dash is sped up and the bulbs still work in the rear as running lights but got no brake light or signal on the left side

Hey Steve. I am having the same problem but only with the left flasher. It stays on and won't flash on that whole side when my brake is applied. Would ot still be the flasher module?

Hi Steve, My left turn signal only works on occasion. It will click as if it's trying to work. Lately, the signal will hardly work at all. Do you think replacing the relay would help with this issue or is it only for hyper flashing or when your flashers come on and off? Thank you for your advice!

Thank u Sir, I had no idea where it was.

Did anyone have difficulty removing the Relay. I can't get enough leverage on the part to pull it out. Does anyone know what's holding it in? Is there a tab need to release?

Little help?...2003 Sierra. I had the problem of my left blinker staying stuck 'on'. Not always but seemed to be occuring more and more. Replaced the flasher (Novita one from Amazon). Boom seemed to work. But a few days later, same problem. Do y'all think it is just another faulty flasher, or something else? I read somewhere a ground possibly? Seems weird that it would be the same side, same problem. Thanks

Thank you so much, this was my exact problem...

Great video. It help me out a lot. 👍🏼

If there was ever a recall this would be the one.

I have a `07 Silverado and my left rear(only) brake/turn signal are not working. I have replaced bulbs, the circuit board under rear bumper and the turn signal switch, still to no avail. I have checked fuses. Right side works perfectly fine. I'm stuck and trying to avoid the mechanic shop. Any suggestions on where to look next? Thanks in advance.

thanx man I fix mine thanx to this video

Could a bad turn signal relay cause the brake lights to stay on? I'm having to same issue with the turn signals making the 4-ways come on, and when I'm braking and using my turn signals they won't flash on the dash,

Hi steve... I hve a tahoe and i did replave all the bulbs into led and this problem appeared (fast flash) Do u think its the relay or somthing else same thing happens wen pressing the double signals.

I replaced mine today but now neither flasher works, but I cannot tell if it's fully seated. When fully seated do you still have gaps on the top and bottom of the relay and its connector? Thanks.

is this the same for my 2007 newer body style? but with the 5 pin? instead of the 10... because i installed LED tail lights w/ the resistors and they still hyper flash.. somone answer please.

I put the new one in and the turn signals work, but now they go really fast. I was having the same problem as you before. Is the unit bad? Or is that how the new ones work?

My signals work and I can hear them ticking on the dash...... just no green Arrows (lights) showing on the instrument panel. Is this the fix for that? Thanks

Thanks for this!

Man!! I just replaced mines. What a job when you don't have proper tools 😅😅😅