for the 3rd brake light on a 2004 taho, what is the fuse labeled?
I believe it is still the fuse for the brake lights.
Right it is the same fuse as the brake lights, most likely it is the third eye brake light assembly itself that went out, you can take out the screws and remove the light and unplug, then test for brake light power and ground, if you have both then it is the assembly. Same thing happened on my Yukon.
Search Chevrolet Tahoe Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Chevrolet Tahoe Experts