I have a 99 lumina i have no brake lights and

Take it , it does not set . ? only sets when driving over about 35.
turned on light indicates on in cluster OK.. but will not set, right.??
Dealers go nuts with this one. give them a try.
brake switch on brake peddle arm often fail and go out of ajustment.

Next is big money unit under the hood. Cheaper to bye after market system..

check brake peddle cut out .switch .
sw has 2 functions: brake lights off when at rest and on for crusie. remove connector. check out the switch.. the sw tabs often fail. tierap helps. or replace switch $ 20. item any local parts store.
ajusted on install.

if fuses are good then check the brake light switch. one wire should have battery voltage all the time and power on the 2nd wire only with the brake pedal is pushed. if you have no power on the 2nd wire but on the feed wire then the switch is bad. if you have power going into the switch and out then you will have to check for a brake in the wire going to the rear brake lights. check the ground for the sockets if diagnosis goes this far.

Check the fuse if the fuse is good then check the power source when apply brakes everything check out good, then is the brake switch theone that mount on the top of the brake paddle. Good luck

here is howw it goes, the power from the fuse goes to the brake switch then to the signal light switch and from there to the rear lights, test for signal from the brake switch to the turn signal, if good the signal switch is bad

blown fuse possible check fuses

Sounds like a faulty brake light switch or a blown fuse. Check the fuse first and then the switch....near the brake pedal. Good luck

Check the brake light fuse if its ok then check the bulbs if they are ok then check the brake light switch. Good luck

check brake light fuse.. if is ok. replace brake light switch

The brake light in the rear window and the main brake lights are on a different circuit. After the signal leaves the activating switch on the brake pedal arm, it splits. One circuit goes straight to the high mount brake light, the other goes into the turn signal switch. If the rear turn signals work but the brake lights don't, suspect the turn signal switch, not the bulbs and wires. Better to check this before removing and checking bulbs, wires and fuses. It is a common problem with the W-body cars like Lumina, Monte Carlo, Buick Regal, Olds Cutlass and Pontiac Grand Prix. (Approx 94-99 models). Part number is GM 190005031 (w/o radio accessory control) or 19005032 (with radio controls)

On your door sticker, there is a date of manufacture. use that date when ordering parts.