Headlight Switch Problems of Buick Lucerne

I purchased my '07 Buick Lucerne cxl about a year ago ago an I actually love the car however; about 3 or so months ago I noticed a what I am suspecting is the transmission or possibly a censor or relay issue causing the car to make a hesitation and drag when I try to keep a consistent speed and only quits when I press or depress the gas pedal making the car either accelerate or decrease in speed drastically. Also, about a month ago I noticed the headlights and dash lights get brighter and then dimmer in a flashing manner at no certain interval; now the "service battery charging system" dic message along with the red battery dash light comes on and goes off also at no specific time or interval ( at which time my heater/seat warmers/radio/etc shut off ). I am able to force the dic message and battery dash light to go away upon my revving the engine or accelerating drastically. I have had both the battery and the alternator checked and both are in good working order so now, after some online research, I will check the fuses and relay switches more intensely. I pray I am able to find a solution as I really do love my car. Also, last week my transponder key quit working in the ignition and had to use the fob remote start to start the engine, thankfully upon checking the fuses under the back seat ( I guess from removing and replacing them ), the key and console ignition did start operating normally again. And I checked my VIN # on this site and it is returning clear to having no current recalls. I am however worried of some of the stories I have read regarding malfunction, I fear I may be facing a future alike incident so if anyone has any solutions I am all ears. Thank you. . .

See all problems of the 2007 Buick Lucerne 🔎.

Both right and left headlights, both hi-beams and low beams will not illuminate. All other exterior lights work. Ac delco 22860591 body control module has been replaced and programed. All fuses and relays have been checked. Headlight switch # 15926061 (without fog and trunk release) replaced. Head lambs still do not work. Without headlights this car is unsafe to drive.