My ride is a 1991 KB diesel pickup.
I have downloaded the service notes from the NZ site, plus I have a Haynes manual. The Isuzu manual says you have to remove the dash complete to remove the air conditioning unit between the blower fan and the heater unit.
The Haynes is almost useless, but says it IS possible to remove the a/c unit from under the dash without removing the dash.
My a/c unit is so blocked by dirt and junk it has to come out.
What is anyone's experience? Thanks