Hello everyone, i hope im posting in the right area. About a month ago i bought a 2000 GMC sierra Ext cab, SLE 5.3 with 4x4. A few days ago, i went to go get fuel at the gas station less then a mile from my house. Started the truck no problem, got there, shut the truck off, fueled it, and tried to turn it back on. It struggled to turn on, lights dimming, etc. Then the starter started clicking, like a dead battery. Got a friend to come jump me and as soon as the jumper cables attached, tried to start it and it started right up, no need to wait for the battery to charge. got back home and turned it off, and turned it back on and it did it again (It struggled to turn on, lights dimming, etc. Then the starter started clicking, like a dead battery). Attached the jumper cables and put them together for it to have a big spark. Once i attached the jumper cables to another vehicle, and tried to start it, it started right up again. Once i jumped it again, I plugged a 12v battery tester into my dash, and it showed the battery on charged. Turned it off, it still showed charged. Tried to start it and it struggled to start, starter clicked, and then the tester went on dead. Anyone have any idea whats causing this?
Im going to go to Autozone on monday to get my battery tested because somebody told me it could possibly be a dead cell. Its a Interstate battery that was bought in Nov 2019.