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Dave Nova
Dave Nova, GMC Technician
Category: GMC
Satisfied Customers: 19452
Experience:  ASE Master Certification. GM World Class Certification
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2005 Yukon slt right rear brake light won't turn on and left

Customer Question

2005 Yukon slt right rear brake light won't turn on and left one will. I've replaced bulbs but that doesn't help.
Submitted: 2 years ago.
Category: GMC
Expert:  Dave Nova replied 2 years ago.

Does the right rear turn signal still operate?

Customer: replied 2 years ago.
actually both turn signals work. I've been talking w/people, something to consider this Yukon had a factory tow system installed and I had to tow some trailers earlier this year. It was a month after that I became aware of the brake light issue. could this be some sort of ground issue?
Expert:  Dave Nova replied 2 years ago.

Looks like all of the rear lighting shares a common ground, so not likely that a bad ground would affect just one light. If you have access to a test light or voltmeter, have someone press the brake pedal while you test voltage on the light blue wire at taillight connector on right side. Let me know what you find there.

Customer: replied 2 years ago.
I'll have to try that tomorrow and see what I find out and get back to you then or next time you're available.
Expert:  Dave Nova replied 2 years ago.

Sounds good. I will look forward to your response.

Dave