Have you checked the brake light switch under the dash
Check the plug in at the lights for power with the brake pedal pushed down
My wife'* Buick brake lights didn't work and the blinkers did
Her blinker switch was bad and wouldn't let the brake lights work but the blinkers did

hope this helps





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That is awesome news I hope thats the problem Ill check it out was I get back home. Thanks you so much for trying to help; Take Care

OK hear is whats happening, when I unhook the turn signals, the driving lights and brake lights work fine, but when I hook up the turn signals the driving lights and brake lights wont work and the turn signals work. Do I need a resistir in between the lights on the turn signals?? Its wierd because the Turn signals are not hooked up and the driving lights and stop lights work but when I plug in the turn signal socket the driving lights automatically turn off?

I forgot to mention that I put LED front turn lights also would this effect the tail lights because it has the hyperflash to them. Its so strange that when I pull the turnsignal wire on the tail light the drive and stop light dont work but when I hook the turn signal up without even having the turn signal activated the drive lights instantly turn off with no brake lights. I need some help because Right now my Yukon is not mobile I cant go out. At least I know that there is no LED'* burnt out because when I wire them up they all do work without the Driving or brake and the turn signals work but when the turn signals are disconnected in the rear the Drive and Brake lights work??

I meant to say :Its so strange that when I pull the turnsignal wire on the tail light the drive and stop light work but when I hook the turn signal up without even having the turn signal activated the drive lights instantly turn off with no brake lights.