Brake lights won't come on when I press pedal.

Check the brake pedal switch it is under the dash, follow the brake arm up from the pedal and you will see it, there maybe two switches and if there is one of those is brake lights and the other is cruise control. The maintenance light can be checked by getting a code reader and plugging it in to the port

Check your Brake Switch on the Back of your Brake Pedal, you have loose wires or your switch is not working properly

-Bulb is good...?
-If so check the push in (On/Off switch) Just above the brake pedal arm. It might be stuck. If it's not stuck, replace new one.

Mai lor

It may sound silly, but check your brake light bulbs to see if they have been installed incorrectly. Brake light bulbs have two filaments, one for tail light, and a brighter one for brake lights. On some cars if the bulb is installed wrong, the brighter filament will stay on for tail lights. The only other thing I can think of is the wrong bulbs have been installed.

Do you mean the brake caliper piston will no move out when pressed, does piston move back when you take foot off brake pedal?

Usually, a hissing noise when you press the brake pedal is indicative of a leaking brake booster, yes.

While sitting still, idling, have someone else push the brake and grab a piece of garden hose or something, hold it to your ear, and listen up under the dash to find out if the noise is actually coming from that area, or you could also just pinch the line with a pair of vice grips, and see if you still hear the noise.

Your brakes will not cease to function as a result of a booster leak, but if it fails completely, they will become substantially more difficult to use.

you may have to change the brake light switch at the top of the brake pedal stop by your local GM dealership in the parts department and they be able to print you off pictures and diagrams but check on the part at your local part store because it maybe cheaper wish you the best of luck Michigan Man.

Does your high mount stop light work? If it doesn't, then it'll be the brake switch located just above your brake pedal.

If the light does work, then it should be the electronic flasher module that will be located under your dash near the steering column. It will be labeled. This controls your signals, but I believe your brake lights are also on the same bulb as your signals, so when this goes, it can affect your brake lights

CHECK THE BRAKE LIGHT SWITCH UNDER THE BRAKE PEDAL

P2299-BRAKE PEDAL POSITION / ACCELERATOR PEDAL POSITION INCOMPATIBLE

Set Condition:
The PCM recognizes a brake application following the APPS showing a fixed pedal opening. Temporary or permanent. Internally the PCM will reduce throttle opening below driver demand. One trip fault and the code will be set within 5 seconds. ETC light will illuminate, the light will only stay illuminated while DTC is active.




Possible Causes

DRIVER PRESSING ACCELERATOR PEDAL, THEN PRESSING BRAKE PEDAL, AND CONTINUES TO HOLD THEM DOWN SIMULTANEOUSLY

STOP LAMP SWITCH

APP SENSOR


The most likely cause of this DTC is Brake Torquing the engine by pressing the Accelerator pedal and the pressing the Brake Pedal.