I have a 1999 Chevy Tahoe which was working perfectly for the 2 years I’ve had it until suddenly several months ago, it wouldn’t start at all, just a loud click as if it were dead, but the battery was still working. I was stranded, had it towed, and fully charged it at home with a pack. It started up just fine after that (having completely disconnected the battery). A week later the same thing happen so I found a lot of issues regarding the passlock, so went through those steps to bypass it, and it didn’t seem exactly to be what the issue was, but would start eventually sometimes an hour after fussing, even the next day at times. This has been going on for months until finally last week in our driveway it just did the click, all power working, but no crank and no turnover. For days we’ve attempted various passlock bypass solutions, even buying and installing a new ignition switch, but alas, the same click and whirring sound no matter what we do. We hooked our battery pack directly to the vehicle so we know it’s not the battery as the same symptom occurred. Is it the starter? And is that the norm for a starter to gradually waste away until it works not at all? I’d like some advice before spending the money on a new starter if that is in fact the glaring problem. Thanks guys!