The old battery was 6 years old. I was going to take it in to be tested, but figured it wouldn't hurt to replace it.

Put the new battery in and started no problem. 2 days later. Nothing.

Charged all night and bought a $7 tester. This morning battery tested and read 13, All good. I disconnected the negative and tested for a drain. I don't know what I am doing but it reads 13 as well. Pretty sure this is only measuring the battery not the drain. I have no clue what I am doing and all the youtube videos start with the assumption that you have some basic idea of what you are doing.

So far it has been 4 hours of my time wasted. That is far more of my time than I would have paid a mechanic to do this.

and you don't even want to know how much this was not relaxing, go inside watch a video, go outside and try something else, back to video, back to truck.