1992 Buick Lesabre heater core

Remove the glove box tray (slides out, pull up and forward). Remove the lower under-dash cover on the passenger side. You can see through the open glove box a blend door motor with an arm coming off of it. The motor is attached to the heater core cover. Remove the 2 screws at the top and bottom that hold the cover to the HVAC box, pull it forward and lower it a little. You can now get to the screws and connector for the blend door motor. Un-screw and unplug it it and move it out of the way. Now you can get the cover out of the way and you will see the heater core. The rest is self explanatory. About a 1 hour job depending on how much trouble the coolant hoses give you.