So ive had this issue for a while now. After some testing I thought it was the battery so i replaced it. Battery was five years old. I had no issues after it sat for a few days so i thought i was good. So sure enough I need to go run some errands and battery is dead. I charge it up and start searching. I pulled the negative terminal off and checked amp draw. I found there was about 2 amps with all lights off that would stay on for a while then amps dropped. So i searched and found the fuse for a factory amplifier was pulling about 2 amps so I pulled the fuse and amps dropped. Since i dont have a factory sound system i figured that was it and left the fuse off. I took the battery to autozone and they said the battery was shot and needs replacement. So i got another optima yellow top under warranty installed it and a few days later trucks dead again. I dont know what else to look for. Any ideas?