Flickering Dimming Headlights Silverado Sierra (How to troubleshoot)

Whats on my truck?

Are your headlights flickering and/or dimming in and out on your Silverado or Sierra? There are a few easy things you can check out to correct this problem. The first thing to take a look at is the ground that runs from the negative side of the battery to the passenger side frame. Take that ground off and clean it real well. If that doesn't work, take your truck to a local parts store (Auto Zone, O' Reilly) to have the battery and alternator tested.

These are a few things that will help you solve your issue. If these don't do it..... best of luck to you

[adrianvillarreal]

You sir have earned a subscriber! My dash on my 14 silverado has been flickering like crazy and after cleaning that ground (which I wouldn’t have known where the hell it was it if it wasn’t for you) seems to have fixed my problem. Thank you and keep up the great content man 🙌🏼

[zgagne]

Ive been scouring the internet looking everywhere trying to get my similar electrical issue figured out on my 2015 6.2L Silverado I cant thank you enough it was the same exact ground on the passenger side undercarriage. Thank you again

[normancupit]

Excellent advice. Cleaned small ground no change. Cleaned big ground at alternator, good as new. Thanks young man.

[toddcombs]

THANK YOU, man I have had this problem and it has driven me almost insane. I even took it back to the dealership over this.Thanks to you I will be checking my grounds.Thank again my brother.

[lumiboi]

Had this same issue on my 2014 Sierra. Along with the flickering headlights, my nav screen and trip screen would flicker and my power steering would go out as well as my parking sensors. Really strange, however, my local dealership had a service bulletin stating that certain trucks in that year range had defective positive battery cables and replacing that should fix those issues. They did that on my truck and haven’t had a single issue for over 3 months now. Just an FYI in case your lights aren’t fixed from cleaning the grounds

[TimG...]

Thanks for the tip about tracing ground wires. In the process, I found a whole bundle of wires that an animal had really gone to town on, and the exposed wires were making contact. Spliced in some extra wire with some wire nuts, and good to go!

[catprints]

This is for everyone else that this tip didnt work for. In 2016 I inherited a 2006 Chevy Uplander (only produced for a couple yrs.) that had the flickering headlight & dash light problem, primarily only noticed at night. Battery & other parts tested fine, couldnt figure it out. Drove for 5 yrs. like that, finally took it to the dealer & guy behind the desk said the only thing it could be was a bad battery but since I had drivien it for 5 yrs. without any starting issue, I found that hard to believe. In 2021 I looked at the battery date stamp & saw early 2013 so I decided to have it tested again at NTB & local auto mechanic, said it was going bad. Only indication is occasionally I would have to give it 2 tries to start. Given the age, I replaced it and the flickering lights problem was gone. Only been a few months but so far so good. It was an Interstate battery by the way. What I dont understand is, if it was bad 5 yrs ago, how could it start & run in all other ways so good for so long? Anyway, hope my story can help someone else because it was so aggravating & at times dangerous when when other drivers might have thought you were flashing them to get out of the way or semi-trucks thinking you were flashing them to let them in.

[HC-oyjr]

Awesome man, bought a Silverado at auction, probably came from the rust belt or bottom of lake. Those grounds are critical came to find out, even caked on mud like you mentioned does a number on your electrical . Thanks for the tips

[ShawnGottii]

Got a 2013 sierra diesel and having same problems going to check this out tomorrow thanks !

[silviacelis]

Thank you for the info ! I have a 2014 z71 and it just started to do this. I will be doing this before taking it to terry Cullen Chevrolet. Thanks again !

[Asher-di]

Life saver my friend got a new subscriber 🤘🏼

[socalhispanic]

I’m gonna give it a shot! My 2015 GMC SLT headlight have a slight flicker. It’s not bad but it’s pissing me off!😂.. I also noticed, if I’m parked, and rev the engine up, my headlights get a little brighter. I hope it’s just a ground! Thanks brotha!

[jeremylakenes]

My low beams 2015 duramax are super dim. New batteries recently and new alternator (both needed replaced). But never affected the headlights.

With old batteries they would flicker, along with tail lights.

[VidTubeWatch]

Thanks for sharing. Good info. I always enjoy your vids. My buddy and one of your fellow subscribers, Alec Crowder is almost at 1000 subs here on youtube. Take care my fellow Arkansan.

[socalhispanic]

Same issue here.. I cleaned the ground on the passenger side and it didn’t work. I had the alternator and battery tested, both are good. Next, I took of the dash to check the two grounds behind the speakers and both looked fine. Other than that I’m stumped!!!! I know there’s other ground throughout the truck but I can’t locate them. I was looking for a book or video that would show the locations of the “grounds” but I haven’t found anything! I Losing my mind now!😤.. it’s pissing me off sooo bad I’m starting to think I should’ve bought a FORD! 🤣

[arturoltx]

Does anyone have had an issue with y’all dashlights radio and a/c flickering and going crazy???

[dawinner]

My lights on my 2012 Sierra the lights are dimming and can barely see at night

[naeemabdulghani]

Sir I have Gmc Yukon 2004 6.0 I have same problem and change battery and alternator but still same can I do same and when I remove plug from ground sensor with battery
It’s stop flicking when I put back again start help me

[robertsanchez]

Hi I have the same problem with the headlights pulsating only when the engine is running on my 2014 Chevy Silverado ltz, I'll try your Method to see if
It whether or not

[haroldfuller]

U help me out mine is doing the same thank you