Brake lights stay on and when i press on the brake they shut off for like 5 seconds then the running lights come on.

It isn't often we get enough information to make a diagnosis, but I think we can in this case.
You have a break light switch under the dashboard that is plastic, and has a "plunger" button.
When you press the brake pedal, that allows the plunger button to extend, which closes contacts inside the switch, and makes the brake lights come on.
If and when that switch either breaks or gets loose, the plunger will stay extended, and the brake lights will stay on, discharging the battery.
God bless your efforts to see & fix this.

sounds like a bulb is not seated properly in a socket in the back..check all the lights and groundwires too..starting with all the 4way flashers..then running lights.

From FocusFanatics online - -

Resetting the oil life monitoring system
1. Turn the ignition key to the on position. Do not start the engine.
For vehicles with push-button start, press and hold the START/STOP
button for two seconds without pressing the brake pedal. Do not attempt
to start the engine.
2. Press both the accelerator and brake pedals at the same time.
3. Keep both pedals fully pressed.
4. After three seconds, the Service: Oil reset in prog. message will be
displayed.
5. After 25 seconds, the Service: Oil reset complete message will be
displayed.
6. Release both the accelerator and brake pedals.
7. The Service: Oil reset complete message will no longer be
displayed.
8. Rotate the key to the off position.
For vehicles with push-button start, press the START/STOP button to
turn the vehicle off completely.

First check brake fluid. If this is ok, one of the ABS sensors are giving a bad reading to the brake force distribution.

Sounds like a GM light switch has bit the dust again. Good Luck

the lights you have on are probably the brake lights. you need to check the brake light switch. it is probably stuck in the on position and that would cause the cruise to not function properly because the cruise automatically shuts off when you press the brake pedal.
hope this helps!

When u power up the vehicle ABS does a self test(light stays on a few seconds then cuts off) and if it see's a problem will shut off and illuminate the ABS lamp. It will also do a second test on iself when you reach a speed of around 12-15 mph,it will run the pump for a few seconds to check pressure and look at the speed sensors,if it see a problem here it will again shut down and illuminate the ABS light.
Now if the red brake lamp is on then it will shut down because it thinks you have a hydraulic concern and will not try and run ABS if this is the case.
If red brake lamp is on most likely if you have good brakes it is a problem with the float sensor in the master cylinder reservior,maybe its bad or just stuck,or just low on fluid.

I maybe wrong, but there should be a proceedure in the owners manual to adjust the interior light timing. If this proceedure is unsuccessful check your dealer for more info.

Trying disconnecting the battery again this time for 10 to 15 minutes. Then reconnect and see if it clears the problem.

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.