Question about 1988 Pontiac Firebird

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Need engine diagram of 1983 Pontiac Firebird

I need one so that I can replace the thermostat and heater core just havent really been able to get underneath and look for it Id rather know exactly where it is before I start being it is extremely cold lately.

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Now this depends,IF your car was equipped with a/c originally,replacing that heater core is going to be a pain in the behind.if it\'s not equipped with a/c,this will be a much simpler task.first things first,pop the hood of the car.on the passenger side,you\'ll see the housing for the blower motor,evap coil if a/c equipped.remove that entire box,label wires if need be.now,go inside the car.start off by pulling the pass. side kick panel underneath the dash.then depending on the model,you may be able to get away with just pulling out the center console.once the glovebox is out,you can peek your head underneath the dash,and you\'ll see the heater box.i think there are a total of 4 bolts holding this sucker to the firewall.undo these bolts,and unhook the climate control cable which is connected at the top of the box.then,unhook all your vacuum lines,label if necessary or i could supply you with a vacuum line diagram courtesy of chilton.getting the box out is much simpler than going back in,i will admit this.i JUST got done doing this same job,and this took me well over 10 hours considering my dash dips down where the map pocket is located,therefor forcing me to pull my entire dash.if you don\'t have a/c,the dash doesn\'t dip,and gives you just enough room to squeeze that box back in once you have the core replaced.if you have to remove the dash,label everything.find sandwich baggies and label for screws,nuts and bolts.this will make life so much simpler.dash removal.since your glovebox should be out at this point,go to the drivers side.undo the lower dash panel,which is just beneath the steering column,this will expose the column shaft and retainer mount.drop the column and prop it up if you need to.the seat should hold that into place.now,the upper dash should have 3 or 4 screws which need to come out.go back to the pass side and peek your head under where to glove dept was.your going to see 3 speed nuts which are securing the dash to the dash extention(mount).undo these speed screws,and go back to the drivers side.undo the obvious screws for the dash bezel which holds the guages.i think there are 4 screws at the top.once unscrewed this should pull right out.be careful not to yank those guages out since i\'m sure the wires will be brittle after 30 years.unhook the volt and water temp guage first.right side of steering wheel(2 smaller guages).label the connections.now you have the remaining items exposed.start with the lighter,this has 2 small hex screws.unplug from the back.now your wiper switch,which comes out the same way as the lighter.depending on model,you may have a rear defrost to unhook as well.ok,now you can remove the screws holding in your climate control module.pull it out,and stop.don\'t pull too far or you\'ll yank those vac lines right out.where the vac line is connected on the right side you\'ll see a screw.unscrew that puppy now you can swing that entire hookup to the left and it should just pop out.unhook the 2 wire harnesses hooked to the module and it should now be free to pull.now you want to disconnect the speedometer cluster.go under the dash and unclip the speedo cable from the guage.it has a push down clip,push it down and it should pop right off.now you can pull that entire cluster toward yourself.label each and every wire accordingly and start pulling the wires and this will be free.now,pop your head upder the dash one more time and look over where the parking assembly is located.if you have the parking brake pedal,that handle on the dash needs to come out.you\'ll see a little retainer for the wire on the left side of the assembly.pop that off the clip,and pull that handle free.it should just slide out with ease.now you\'re ready to drop that dash.lift up slightly at the top,and swing the bottom out.now you\'re dash is completely out at this point.i would personally start off with that heater box,get that installed and THEN place the dash in place and start installing vise versa of which i just explained.this sounds like a lot of work,but once you do it,it\'s quite simple.i do know though,i never again in my lifetime want to have to pull that dash.what a pain.so,if you\'re thinking about changing up interior colors,i would honestly paint the dash while it\'s out making life easy at this point,eliminating you from having to do this job again in the future.take your time,and label every wire and every screw and you shouldn\'t have problems.good luck my friend!

Posted on Mar 06, 2013

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You follow the top radiator hose to the thermostat
housing & remove 2 bolts

The heater core-- I would try flushing out from the
heater hoses,just don't use full garden hose pressure

Posted on Dec 10, 2012

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Posted on Jan 02, 2017

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SOURCE: 1994 pontiac firebird HAS NO HEAT

Okay. warm up vehicle, get radiator hoses hot.  Turn on heater, fan on low.  Grip both rubber heater hoses close to the firewall, from the engine compartment side.  They should be too hot to hold for long.  If they are not hot, then you have a lack of coolant circulation to the heater hoses.  If they are hot then access heater core, behind glove box area.  Blend door which moves as you chose HOT or Cold, should be cable controlled, move the controls and be sure the door is actually moving. Keep me posted 

Posted on Dec 17, 2008

salvidordali
  • 103 Answers

SOURCE: I need to replace my heater core

Bad news. You will have to remove the entire dash board to replace that heater core. Sorry

Posted on Jan 12, 2009

johnsmith992
  • 37 Answers

SOURCE: Replace heater core in Pontiac Grand Am GT 3.4l

ram a sharp chissel or pointed head centre punch through the core and prise it out .,than tap the new one in place ,,,there u go bobs ure uncle

Posted on Jan 29, 2009

  • 72 Answers

SOURCE: I need an engine diagram 1994 firebird 3.4 v6

Sounds like some sort of exhaust limiter for hot and cold engine running mode. It needs to be re-attached or replaced.

Posted on Jun 08, 2009

czaa
  • 4536 Answers

SOURCE: need a diagram and instructions on how to replace

that whole operation can be a nitemare for a novice-ur library has chilton manuals-

Posted on Aug 27, 2009

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