Lancebirm

Good afternoon everyone, ive Searched and searched for my problem but haven’t found anyone with the problems I’m having so let’s dig in. I have a 2005 GMC 1500. like most on here, while driving and sitting my ABS and break light pops on randomly, when this happens I sometimes get service 4wd or service air bag or other things that pop up with it and sometimes nothing pops up. Along with this issue I’ll randomly get my security light that pops on and all my gauges go to 0 except my Speedo and RPM gauge. When the security light pops on I also lose power to my AC pump it seems like because it will be ice cold then go to hot real quick until my security light pops off again then it starts working. I’ve hooked a reader up to it and it gives no codes once so ever. I’m completely stumped. I was hoping that someone on here could help please! thanks in advance!