Jump to content

Driver Dimming Mirror Not Dimming

WS6FirebirdTA00
 Share

Recommended Posts

WS6FirebirdTA00 Enthusiast

WS6FirebirdTA00

Posted
Posted

Hello, looking for some advice on troubleshooting my driver auto dimming mirror that has failed and is no longer dimming it’s a 2018 Sierra.
 

I’ve been trying to search for this and the only results I really come across are ones where the dimming is stuck on. I was hoping to find some information on the wiring to do some troubleshooting and see if it was a signal issue or a hardware issue.

 

The rearview mirror works fine. I figured one place to check would be the wires where the mirror folds. I regularly fold mine up and wonder if something just failed in there. I wasn’t sure if anyone had any other tips before I started digging into this. A little hesitant to tear into the mirror if I don’t have to, I don’t want to break any of the plastic.

 

It’s been several months since I drove in the dark so no telling when this happened. I’m a little concerned when I removed the center roof console to run a dash cam, maybe something happened in that area. I made sure everything was plugged in and was not pinched.

 

I appreciate any tips or advice you all may have. I was hoping to find a common issue with recommendations, but struggled to even find one.

  • 4 weeks later...
WS6FirebirdTA00 Enthusiast

WS6FirebirdTA00

Posted
  • Author
Posted

Fixed it. Mirror was bad. Installed new part number 84499222. Looks like the factory unit had poorly soldered connections. Hopeful I may be able to fix and have a backup.

 

Super easy to remove also. Tilted the mirror all the way down and popped it straight up. Found this link on YouTube that made it easy. Took me just a couple minutes.

 

 

  • Like 1

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
      2027 GMC Sierra: Official Discussion

      By newdude · Posted

      Follows the motif on the Sierra EV.  Satin finsh to the lower bumper area, painted above:   Elevation       Denali      
    • taze
      I love my truck but

      By taze · Posted

      Not exactly what I was hoping for, but I do like it. I wonder if they'll bring back Smokey Quartz Metallic? 🤔 https://gmauthority.com/blog/2026/06/here-is-the-all-new-2027-gmc-sierra-1500/
    • tjonesdfw
      2027 GMC Sierra: Official Discussion

      By tjonesdfw · Posted

      Whoever greenlighted the work truck matte black front bumpers on every trim but the AT4X should be fired!  I was hoping that was an AI mistake, but just realized they were on every model of the 2027 Silverado too.     Some parts of the interior do look premium, but the Denali Ultimate dashboard looks like an afterthought.  At least they appear to have lost the microfiber the high end Silverado models showed, but the '27 High Country dash looks better than the Denali.  
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      New member here. I am researching a read-first event-recorder concept for late-model GM V8 trucks. This is not a sales post. There is no product link, price, preorder, or mailing list. I am trying to determine whether the underlying problem is real before building anything.   Has your truck ever had a brief problem such as: - rough running or a momentary misfire - an oil-pressure warning or unusual pressure event - reduced power or a brief stall - a U-code or lost-communication problem - a symptom that disappeared before the dealer or independent shop could reproduce it   If so, I would appreciate the following details: - year, model, engine, and mileage - what happened and under what conditions - whether a DTC and useful freeze-frame data were stored - whether the shop was able to reproduce it - what the eventual confirmed repair was, if known - what additional information would have helped the diagnosis   The concept being evaluated is a removable leave-in recorder that continuously retains a rolling window from before and after an event. It would not tune, reflash, clear codes, or change the vehicle calibration.   I am also not claiming that it could predict lifter failure or see every internal ECM variable.   The real question is whether continuous event history would add enough useful evidence beyond freeze frame, GDS2, and existing scan tools — or whether it would simply be another unnecessary gadget.   For owners and technicians, which problem would make something like this genuinely useful: 1. intermittent misfire or AFM/DFM-related behavior 2. oil-pressure events 3. lost communication or electrical faults 4. none of the above Please be blunt. Negative feedback is just as useful as positive feedback.
    • Atlas
      2027 GMC Sierra: Official Discussion

      By Atlas · Posted

      No tears over the SLE and SLT trim levels disappearing but I kind of loathe the "Elevation" name. It's a truck--skip the elegance.   The slab-dashboard design is decidedly different. Almost has a Hummer flavor to it. "Professional Grade" seems to be leaning very white-collar, tech-driven these days moreso than blue-collar, functional design.   The Silverado would be my choice between the two new trucks. Pleased with the engine lineup in both. The GMC is a little "too much" for a truck, IMO, and the Denali borders on ridiculous - but I do know there are buyers for luxury trucks out there. It's just not my speed.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...