2000 - 2004 Nissan Frontier Heater Core Replacement - Note that the A/C has to be Evacuated

Replacing the heater core for the 2000 to 2004 Nissan Frontier if it is leaking or the plastic pipes have broken. It is really not that hard to do, but the Air Conditioning System must be evacuated and the lines disconnected to be able to access the heater core since the A/C evaporator box has to be removed. Be prepared to spend some time removing the small screws that hold the tubes onto the heater core as well as a couple of them are very hard to access to remove. Pre starting the upper small screws is a must as it is almost impossible to get the upper ones to start straight on the install.