2020 Chevy Silverado Custom - Turn signal flashes randomly

[CharlieRay]

Hello-Has anyone had this issue...turned off truck and on the outside of truck the right turn signal flashed a couple times. then a few mins the left did it. I do have a appt to take it in but of course the two dealership services I called had no idea what it could be. TIA. 

[JPolton]

Hey Charlie, I have had this same question for quite some time now and I still can’t find an answer. Have you heard back from anyone about this situation, if so fill me in please and thank you.

[Jbholdem]

Hello, I just seen this happen on my 2020 chevy silverado custom . The right turning signal just started flashing with the truck off and alarmed. It is raining out and not sure if moisture has anything to do with it. I would appreciate any feedback if anyone has the same issues.

[CharlieRay]

My truck still does this and the Chevy dealers around me have not been able to tell me what it is doing. its still randomly blinks. sometimes just one tail light. or just a front light. sometimes together. Hopefully someone will figure it out. 

[jameswiedow]

I have a 2020 Silverado and it does the same. Turn signals randomly flash after truck is parked and running or when it is turned off and doors are locked. Seems there are a lot of the same problems here.  

[jcor925]

That means that your tire pressure is low on that tire, these trucks blink even if the dash light isn't on.

Edited January 25, 2022 by jcor925

[Glenardnemoy]

On 1/25/2022 at 11:18 AM, jcor925 said:

That means that your tire pressure is low on that tire, these trucks blink even if the dash light isn't on.

Seems like this is the most plausible as I do have one tire with low pressure. But it starts blinking on my drivers side and my low tire is passenger. Why in the hell does our trucks have to tell everyone else that the tire is low in air. Dumbest feature by far. Sure makes a guy want to get air considering its a sore thumb all blinky blinky...... 

[3SunSully]

If this is the true reason (low tire pressure) why would the dealership not know this? Lindners Chevrolet charged me $85.00 to "flash the computer" to stop the random flashing. Whatever they did if anything did not stop the random flashing. I really hope this low tire pressure is true. 

 

Thanks all 

Sully

[WillC]

Just had this issue with my 2019 Tahoe it had been sitting for a year so all four tires were low. Aired up all four tires and the intermittent turn signal flashing stopped.

[Nathanrl]

I had the same issue. as i was putting air in the tire it started blinking again. and when it reached the pressure, the horn beeped! kinda cool but weird all at the same time.

[ErnestMoore8686]

On 1/22/2022 at 2:46 PM, jameswiedow said:

I have a 2020 Silverado and it does the same. Turn signals randomly flash after truck is parked and running or when it is turned off and doors are locked. Seems there are a lot of the same problems here.  

I have a 2024 Trialboss and mine flash at random times as well and I come to find out it’s due to the air pressure you have in your tires!! If one is low the signal will flash at the tire that is low and or lower than others so if all your tires have different pressure all but the one with the money air will flash..

[Rob71]

Anybody ever have it on a 2020 Chevy trail boss when you use your right blinker your bright lights flash? Doesn’t do it when you use the left blinker. It’s only the right blinker and mostly when you click it all the way up.

[GMCustomerService]

On 4/12/2025 at 5:14 PM, Rob71 said:

Anybody ever have it on a 2020 Chevy trail boss when you use your right blinker your bright lights flash? Doesn’t do it when you use the left blinker. It’s only the right blinker and mostly when you click it all the way up.

Our team would like to look into this, Rob, and get you into a dealership who is happy to help. Please send an email to [email protected], and be sure to include your full VIN. We look forward to your email. By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.