You have to connect the both hoses that go into the heater core on the passenger side but that will throw codes and you will have a light on the dash
I need to know how to place it,and where is it located at on the car
You have to drop the steering column and pull the dash. Then after locating the heater core case below windshield you have to cut out a piece with a Dremel. After replacing the heater core you have fun putting everything back together..(use plastic weld to seal the case back up).in other words don't do it yourself it is a huge pain.
Passenger side under the dash
A/C or Heater? Be more specific.
Under the dash passenger side
you must remove the steering column and dash board and disconnect the a/c and heater hoses from the firewall. it might help if you remove the upper intake to provide you easier access/but the dash has to be completely removed. hope this is helpful
Passenger side behind the glove box.
Lincoln dealership parts man or go to library and get a chiltons repair manual for 69 Lincoln.
it is behind glove box and yes the dash must be pulled sorry. it is in the heater box betweenthe heater core and a/c evaporator book time is 11 hrs i know guys who complete the job in four but be prepped to replace heater core and maybe evap if signs of leaks are present and age heat box was revised because hinge pin would brake of blend flapper plastic door
http://www.markviii.org/LOD2/blend_door_repair.htm
The two hoses that run thru the firewall into the heater core should both be hot. Check them with your hand; you may need to flush/replace your heater core. I hope this helps you. Mark
On all chevys that year 1979-1988 It's Not Fun. Step 1. Remove heater hoses from core under hood. 2. Remove glove box door inside. 3. Take off all 5 heater mounting nuts under the hood. 4.Remove defroster hood on front of heater inside . 5 Gently pull heater unit back and down. 6. Remove all control cables from heater and mark them. 7. Then you can take heater core out of heater casing by removing 4 srews from case where core is. 8. remove front and back retainer straps from core. Reverse to put it back in.