To change out the heater core you must first remove the area where the lower console is, behind the radio is the heater core. You have to remove all the hardware and remember where each and every screw goes, not kidd
ing. It is truly easy to forget where they go after about 75 screws removed. Enter your local auto parts store and ask for a repair manual for a 1993 Grand Prix. In this book you will view the sequence on how to do this yourself. You will be required to use the necessary tools to complete the job. It is an in-depth job that requires skill, knowledge, and e
xperience.
How do you change a heater core on a 1993 Grand Prix? Is there a place to get details or can you give them to?
Hi
Here's where you can find your problem and fix
it , Its behind your glove box pull everything out lift your matt you will see two hoses with clamps take them loose go look under your hood on the right side of the car you will look for two hose's they have clamps on them as well,Take them loose go back behind your glove box pull out the small radiator take it with you too the auto parts store get another one put it back in all done have a nice day.
hair spraycat