STARTER. take it to a shop it needs to be replaced.Another problem is that the fly wheel is messed up. the fly wheel teeth get grinded down and it has problems starting up which begins to mess up the starter to.
disconnect battery
Yes, if it fits the holder.
check your regulator. it maybe over charging your battery
Under your battery tray
Group 75.
Disconnect the negative battery cable from the battery.
Remove the positive battery cable from your 1997 Chevy Blazer battery. Remove the cables from the front of your starter. Remove the starter retaining bolts. Reverse the process to install the new starter.
Group 75.
Under the battery tray. You need to remove the battery and battery tray to gain access.
did you check your battery and alternator?
About 30 min.
under the battery plate