Hello everybody. New to forum and searched for an answer but came up with no luck. I have a 94 3500 6.5 with 150k miles that is new to me. When I first bought the truck it was difficult to crank. Sounded like a dead battery sometimes. Maybe 3 or 4 times and she’d start. So I figure let’s check batteries alt and starter. All good. Let’s check grounds. All good. Well crap. Glad they’re good but what is the problem?? Ah! Let’s upgrade the battery cables. So I went 2/0 cables and #4 for alt wire. Still clicks like a dead battery sometimes. Can anyone point me in the right direction?