91 3.4 Z34 Heater Core Removal Help

hi i have taken the plastic covering off from inside to show the heater core, now i have seen replacement ones and they arent like the orignal heater core u can take it apart inside with 2 clips

but so i have the Plenium off the engine and disconnected the heater hose that goes to that plastic clip which is a stupid idea as my engine coolant leaks from there but how the heck do u get the 2 Clamps off the heater core pipes

do u need a special tool its aquared to get at and i really dont wanna take of the engine head just to get better access what have some of you done to get at that or even a way to cut the clamps off

The how to is at autozone.com, repair guides.

maybe you can send the direct link for the removal of the heater core as i cant find it

and do i need a special tool?

Here it is. http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c15280067f85

damn thing is generated so all it does it ttakes me to the year

if you can do step by step what you clicked after choosing 91 lumina be good

Choose the year, then Chev, then Lumina, then engine, then repair guides. When I click the link it goes right to ther heater core job!

some reason i not getting it, i have to choose repair guides first then the year and final 3.4 engine size and then takes me to page that only offers

* Engine Electrical
* Driveability&emissions Controls
* Brakes
* Suspension&steering
* Chassis Electrical
* Routine Maintenance
* Engine&engine Overhaul
* Body&trim
* Drive Train
* Fuel System

but if i choose say Engine&Engine overhaul nothing under there
and there isnt anything under this page

i did find option under product how to option on the side for heater core but thats vage doesnt say how to do it for a 3.4 engine like if i need special tool to remove the 2 clamps and if i need to remove the engine head and fuel rail to get at it