Need wiring diagram of 1995 chevy blazer 4x4 with 4.3 vortex engine

Go here. http://bbbind.com/free_tsb.html

If you mean the control module, previously called the "computer chip" it is under the distributor cap. If you mean the fuse box it is under the dash on the drivers side.

Yes, it's involved though. You would have to use the PCM (or ECM), and wiring harness's for both the engine and transmission. You would have to get wiring diagrams for both vehicles (eautorepair.net $29 year). Then you would have to look over each wiring diagram and interface the newer wiring diagram to the older vehicle. Not impossible but requires a knowledgeable mechanic.

Probably easier and cheaper to get a reman short block and overhaul or replace your 1995 transmission.

DIagram about what? Firing order or what?

need a wiring diagram for a 1999 chevy blazer 4.3 4x4... had to replace motor and now the 4x4 wont work... anyone know where u can print off the diagram

Check this link and as you read a bit down,you'll see a further link to get the diagrams:
http://www.wiringdiagrams21.com/2009/03/02/1995-chevrolet-tahoe-blazer-electrical-wiring-diagram

Try the dealer for that. They'd print you the copies free from their microfiche.

Should hook up to junction block on the fire wall near brake booster . Should be 4 all together , these are main power supply's for the vehicle ,two power the ignition switch .This is not a direct feed to the transmission . View wiring diagram here http://www.bbbind.com/free_tsb.html Do you know what a wiring diagram is ?
Enter vehicle info. year,make ,model and engine . Under system click on electrical distribution then under subsystem click on power distribution . Then click the search button ,then click the blue link .
Watch this video starting at 24 min .in , shows junction block .
Fuel pump electrical circuit diagnosis no fuel pressure testing GM

there no such thing but you can buy the hanes manual at autozone for $25 this should help

oxygen sensor should be located in one of the manifolds under the blazer it may have 2 you can see them they will be screwd into the pipes connected to exhust with wire out the top of them