Thanks - the brake light goes on and off intermittintly but I am not experiencing any problems yet.

The brake light issue isn't likely the the brake switch (since it sounds like your other brake lights are working properly). It's likely a bulb in the third brake light. When the filaments get old they sometimes lose and regain contact as the car vibrates on the road. Change the bilbs and see if the problem goes away. If it doesn't, look for a bad wire connection around the third brake light. Also, have someone verify the third brake light isn't working from the back of the car when you see the alert, it could be a bad sensor.

Make sure that the wires to the brake switch are not getting pinched. If you press the brake and the problem goes away, then the problem has to be centered there in the brake pedal area. The other thing you can check is to make sure that the brake pedal springs back to normal location, if the spring is broken or worn out, then the whole weight of the pedal is going to lean on the switch, turning it on eventually. The brake pedal should barely touch the switch and not rest on the switch.(some brake switches may be different and may not be push button). Either way, make sure that brake pedal is coming up all the way.

although I have not experienced this problem in the exact vehicle you have, General Motors has had problems with the turn signal switches in many of their vehicles. The turn signals may still work properly, but the electric signal from the brake light switch passes through the turn signal switch (also called a combination switch) before it goes to the brake lights. I assume you have no problem shifting out of park or you would have mentioned it, which tells me the brake light switch is functioning properly. First thing to do, as always is to check for blown fuses. If it is a blown fuse, you then need to determine what caused the fuse to blow. If you have towed a trailer recently, it could have been faulty wiring in the trailer, or it could be faulty wiring in the trailer lighting harness of the Escalade.

Most likely there is a short in the wiring for your brake lights. Modern automotive electrical systems are very complex, if you're not experienced with automotive or electrical repair it may be best to take the car to a reputable repair shop. Parts stores can not diagnose or repair this type of problem.

From the symptom you have stated, there is a problem with brake system. You have not mentioned whether you have any braking effect on the vehicle when the brake pedal goes to floor. Anyway, you may check the following:
1. Check brake fluid level in the brake fluid reservoir. If the level is less, then you have to go to a garage as just filling up the fluid will not help and the brake hydraulic system needs bleeding.
2. Get the brake adjustment of all the wheels checked by an experienced garage mechanic.
3. Get the Brake Master and Wheel cylinders checked by an experienced garage mechanic.
4. The brake liners might be worn out. Get the same checked by an experienced garage mechanic.
5. Brake pipes which convey brake fluid from Master cylinder to the wheels might be leaking. Get the same checked by an experienced garage mechanic.
Whatever may be the cause of the symptom, do not use your vehicle till you get the problem solved as you are accedent prone without the brake system proper functioning.
Good luck..

the only thing i can think of as a problem would be brake pad quality. i would get some from the dealer and fit them. if there is chatter going on it can also be caused by low quality rotors or a bad maching job. have them inspected for integrity.

Sounds like u may have a short in the wiring or could be a sencer that has something to do with the anti lock brake system.

this issue sounds like a grounding issue, teh main clue being everything gets dimmer. sometimes an additional ground is a faster repair than finding and resolving under dash issues.

This issue will likely NOT be battery or alternator.

Love the right rear tire clue, and it should not be related..

YES THE PROBLEM ON THESE IS THE MULIFUNCTION SWITCH, ALSO KNOWN AS THE TURN SIGNAL SWITCH. THE SYMPTOM FOR THIS SWITCH BEING BAD IS THE ONE U HAVE ACCORDING TO A SERVICE BULLETIN. PART # ACDELCO D6280A

Change your oil pressure sending unit? it wouldn't be my first.