Rear break lights and blinkers on a 2000 Denali

Try changing the bulbs.

Thanks I did they all new still nothing

Then follow the wiring from the rear tail light lens back to a plugin, there may be one on both sides. Should have something to test for power at the connector like a test light. A lot of times these connectors loose contact. See if the problem is there.

Thanks I done that all so

Well then your killing me here...lol. Is there a circuit board in the tail light lens? Those go bad.

Lol sorry man I swopped out one hole lends thinking that may work too lol it's got me puzzled

But you have power back there to the plugin? Look for and check and clean up ground wires.

Check and check Grrrr nothing seams to be working