first, the 7 yr old battery died. No big deal, I bought a new one. Before the batter died, it sounded rough starting. Like the gear grinder at the end of the start. After replacing the battery, the slight grinding sound still exists intermittently. One start it was a very slow start like a low battery. Bio on the truck. 1998, LC, 143k. Recent work: new stereo 4 months ago, converted to synthetic oil a week ago. I cannot imagine any of those would cause this failure, but might as well bring it up. Is the starter on its way out? I just don't want to get stranded in the middle of nowhere.