if your truck is running and you disconect the batery and the truck dies then its the alt
Inside the alternator. When you get a new alternator, you get a new regulator.
You may need a new alternator and or battery.
Start replacing the 2000 s10 alternator by disconnecting the battery. Remove the air inlet hose, and the serpentine belt. Take off the bracket over the alternator if it has one. Unbolt the alternator and disconnect the wires. Reverse the procedure to install the new alternator.
We need to know what year the S10 is, it matters.
You failed to mention what year the S10 is but, most of them use a fusible link to protect the alternator circuit.
get a wrench that fits the tensioner and pull it back until the belt has enough slack to go on the alternator
Need to know what year S10.
An alternator from a 2000 Chevy blazer will fit a 2002 S10 blazer with a little fabrication.
Need to know what year S10 you have, they mount them in different places.
We need to know what year your S10 is.
We need to know what year that S10 Blazer is.
Remove the belt from your 2001 Chevy S 10 pickup truck alternator. Remove the wiring harness from the back of the alternator. Remove the alternator retaining bolts. Reverse the process to install your new alternator.