The rearview mirror LCD display is dim?

2003 CHEVROLET SILVERADO

200,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC

MIKE1961

MEMBER
24 POSTS

My internal rear-view mirror has an LCD display on it. It shows the vehicle direction of travel, and the external temperature. My display started to dim, and then came back. But over time, it has dimmed again, and has now totally gone out. Is there any way to fix this, or do I need an entire new unit? They are very expensive.
Thanks, Mike1961

Dec 11, 2023 at 5:01 PM

STRAILER

✓Experienced Mechanic
55,238 POSTS

What happens is the LCD driver module goes out inside the mirror. You will need to get a replacement which I have had good luck with Ebay for or you can try for a new unit from the dealer. Check out the images (below). Let us know if you need anything else.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Dec 12, 2023 at 4:15 AM

MIKE1961

MEMBER
24 POSTS

These images are for an external side mirror. My question was about my internal rear view mirror. Perhaps there has been some confusion.

Dec 12, 2023 at 5:07 PM

STRAILER

✓Experienced Mechanic
55,238 POSTS

Sorry, my bad, there is only one voltage output from the BCM, the other electronics that run the rear-view mirror are internal, here are the wiring diagrams for the system so you can see how the system works. It sounds like the mirror will need replacing. Check out the images (below). Let us know what you find.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Dec 14, 2023 at 2:59 AM