I have a 1996 Chevy c1500 w/t v6 Vortec & I replaced the starter & flywheel & it ran for a couple months then the starter stopped hitting the flywheel (it just sounded like it was spinning) & wouldn’t start again, shims didn’t work. Got a new starter & it starts again but every couple months I have to warranty the starter & put a new one in. I’m on my 4th starter. Why does it keep going through starters?
The reason for the failures can vary. Are the starters new, rebuilt or remanufactured? It is possible that the rebuilder was supplied with a substandard component. If that is the case, you will be replacing your starter until that inventory is used up. Talk to your supplier and see if they can source you a different brand or perhaps the next model up in the price tier.