For a couple months on an off when driving my 2016 suburban my turn signal will turn on and off, my bright lights will cut on, the red stop warning light that comes on the windshield will out of the blue come on (even when no one is in front of me). I’ve also noticed from time to time my touchscreen display will not work either.
If i cut the truck off and back on it goes back to normal but then randomly just driving down the road and one of the things listed above will happen. The blinking red light and seat vibration scares me every time. It happens the most.
Since all of this start there has been 2 times my check engine light came on blinking for a few minutes and then goes away. After the first time i took it to the shop and they couldn’t get a code reading because it was no longer on and just said it was probably because my oil needed to be changed, although that has never happened in the 5 years I’ve had it. But then it happened again last weekend.

none of this may be related but what could be going on?? The mechanic and my husband think I’m crazy. But my kids have even witnessed this stuff happening. HELPPP