89 Astro Van Heater Core

I need to replace the heater core and was told to access it from the inside. After taking off the cover I see through to the A/C but don't see the heater core. I know I'm probably staring at it. Can anybody help please?

Thanks in advance

t

the 89 astro is the easiest heater core i've ever replaced. buy a new one first, about $40, so you know what you're looking for. remove the large black plastic cover under the dasboard on the passenger side to locate it, held in with 7mm bolts. then pop the hood and locate the hose connections above the blower motor and remove the hose clamps. on an old beast like this you'll probably need to cut the hoses off and replace them too. just use a razor knife to slice the hoses parallel to the pipes and peel them off. the hoses are just "cut to fit", two different sizes. take them to the parts store for replacement lengths.