Tired of my blazer

About a month ago i went out to start my blazer it wa dead. So i went and got a new battery and it ran fine all that day. Then the next morning it was dead again. So i jump it and went to work and got off work and it was dead again. I had it jumped again and i put a new alt on it and charged the battery back up. the next day the same thing it was dead again. then i took the altn wire off and unhooked everything that is aftermarket on it. the same thing happened the next days. i have am tried of it PLEASE HELP ME

there's something drawing power form the battery. i had an olds 88 and the power antenna motor seized, but it still drew power because it was trying to come down when i shut the radio off. possibly a light is stuck on or somehting

Have the battery tested - new ones do fail so could be simple as that. Had a new one that died in 3 days. Hope its that easy.

i have changed the battery 3 times. i am using optima batteries. i have not had any problems with them in the s10 we own. it has the same thing done to it