Replaced starter now car won't turn over, PLEASE HELP

Try checking to make sure you put the small wire on the S term. And not on the R term. Then check your battery cable to make sure it is tight and a good charge on the battery. (And do you mean it will crank but not run or will not even try to crank. Listen for a click if you hear that then try what I typed it should work)
Haz

Try giving it a boost. That might be the problem

I have the same problem w/ my 95 Blazer. It won't even turn over I get nothing. All my dash lights go on, the fuses are fine and the radio works. I was told to trace the small wire on the selenoid back to the relay, but I'm having a hard time finding it. Keep me in mind if you find a solution.

I am not sure if this is one of those vehicles but some GM cars have a fusible link wire that runs to the starter. I believe it goes to the alternator.

I agree with a prior post that the S and R wires may be crossed. If not check for a fusible link wire