Need to locate access panel to replace HeaterCore 1990 Buick Skyl

YOUR LOOP WILL BE MADE WHERE BOTH HOSES GO INTO THE FIRE WALL TO HEATER CORE.YOU NEED A LONGER WATER HOSE I WOULD DO THIS FIX TO GET YOU HOME.

Replacing a heater core is a all day ugly job. You have to remove the dashboard and heater box. Its located behind the glove box. Best thing to do is buy a auto repair manual for your car and read up on this job.
Good luck and thanks for your question and I hope my suggestions help. burdfrenzy
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No the dash panel does not have to come out.You will have to remove the console if equipt.You will also have to jack the vehicle up and disconnect the heater hoses from the heater core.Let me know if you have anymore questions.Good luck.

Inspect/Replace If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

• The heater housing is usually under the dash and must be removed to gain access to the heater core.
• Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.

The heater housing is disassembled to get to the heater core. Heater Core

• Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
• Remove the heater coolant hoses.
• Remove the cable and/or vacuum control lines (if equipped).
• Remove the heater core securing brackets and/or clamps.
• Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
• To reinstall the heater core, reverse the removal steps.

When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

the heater core is located inside the air ducting that is inside the dash, u must remove the entire dash assembly to replace the heater core, a very difficult job even for a seasoned technician.

Hi there,

Well the heater core is located under the dash on the passenger side, usually cased in a plastic housing.You may have to remove the glove box in order to have access to. And when you get to the point, when you are disconnecting the coolant lines and remove the core you use some clothes to protect the carpet as fluid may drip. Post comments for further help or information........
Good Luck!!
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You locate the heater core by following the heater hoses in the engine compartment. These hoses need to be disconnected. Then, working inside the passenger compartment, take off all of the control panel. You'll see screws underneath if you lie on your back. The only trick is to pop out the vent louvers -- just pop them out with a screw driver. There are screws behind them. Take out the glove box. Take off the heater outlet duct and the heater core cover. Pull the heater core straight back to avoid breaking the drain tube. Remove some clamps and that's it.

I believe you have to dissassemble the lower part of the hvac unit under the dash to gain access to the heater core, then disconnect the hoses at the firewall and remove the heater core.

Your heater core needs to be replaced. The heater core is like a mini radiator, providing heat for the interior by coolant circulating from the engine, into the heater core, and back to the engine again. Like a radiator, a heater core can spring a leak, especially w/ age as a factor. This results in the leak inside the car, which also causes the 'smoke' you see, which is actually vapor form of coolant.

Pull the panel under the glove box. You should be able to see the heater core. disconnect the two hoses under the hood on the firewall to the heater core. put a pan below to catch the antifreeze. Replace heater core. reconnect hoses.