It is inside the HVAC housing, which is behind the dash.
To change the rear axle fluid you can remove the rear cover from the axle and drain it that way. If you don't want to remove the rear cover you can use a pump and a hose to drain it through the fill hole.
It is on the lower driver side of the radiator.
Thermostat stuck open, heater core clogged, or the heater temperture control vlalve is defective.
how do you change the heater core on a 99 cadillac deville? I need to know, "Kaiser."
How do you drain a 1996 Seville radiator
The 1996 GMC half ton pickup truck heater core can be removed by removing the heater core retaining bolts. Remove the heater core water lines. Reverse the process to install the new heater core.
Heater core is leaking. Air Conditioner drain hose is plugged.