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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29522
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Chevrolet Tahoe Z71: One of my brake lights isn't working.

Customer Question

One of my brake lights isn't working. Running light works and bulb is new.
2005 Tahoe z71
Submitted: 2 years ago.
Category: Chevy
Expert:  GM Tech (Cam) replied 2 years ago.
Hi there, I am Cam. Please confirm one detail for me, when you say one brake light does not work, you mean or instance the right rear brake light does not work but the left rear does?
Customer: replied 2 years ago.

Yes correct

Expert:  GM Tech (Cam) replied 2 years ago.
Tom, this is actually really good news as it means the issue is narrowed down to one of the following.
First there is a single wire that take the brake light signal to the back. It goes into a junction block inside of the rear right fender behind the wheel.
So the issue is either that junction block, the wire connector to the effected side or the plug at the bulb. You can trace that quickly and easily. ITs a light blue wire.
Customer: replied 2 years ago.

Thanks Can...sounds like it should be an easy fix...I'll let you know.


Expert:  GM Tech (Cam) replied 2 years ago.
I am sure it is. The junction blocks and wiring are both common for issues.