on a 98 Blazer with manuel seats can you put power seats in its palce is the wiring there already ?? what year models would fit ??

 

not sure on models but yes. the harness should be tucked under the carpet under each seat. that is what i was able to do on my 99...i swapped in 03 seats outta a trailblazer (s10) version

 

Yup, look under the seats from the rear & you should be able to see the harness/plug already there.
GM figured it's more economical to pre wire for customer options than to have a shop/dealership install the wiring - usually.

 

I have a 96 blazer the drivers seat stopped working pulled the seat out, found the broken wire repaired it installed the seat. I have power to the plug have power coming in to the switch but seat still will not work. I ran a hot wire to the three little motors and they will not do anything. Help