Been having a continuous problem with starters. Lost track really, but I think up to about 6 starters in 10 years owning this truck. 4 Since the big build. Most were oem, then the last one I bucked up and got a real denso. The big daddy that barely fit. Thought all my problems were solved. But no. IT has developed the same as most the others. The first ever replacement was because it wore out, didn't spin fast enough. Since then its been what I figure is the starter solenoid packing in. WHy? I can't figure out. Over the years, and researching, experts on this sight point to the white block on the column that the key tumble engages, and the tumbler itself. I don't doubt this since the keys themselves cant even be remade because there too worn. But my doubt is because, on all the starters, when the starter fails, the solenoid still makes a click sound. So if it were the key system, why is the signal still making the solenoid click, and since it is, why does the starter not go? Some times its one key cycle to get it to go, some times its 10 cycles or more, every time the solenoid clicks on the starter? If its the solenoids on 5 starters including the year old denso, then why do they keep failing, it has to be something with the truck in order to kill 5 solenoids on the starters? Or what, why? Cant figure this out. Have warranty, but feel crappy taking starters back that I'm killing some how.