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Remove the heater hoses (after draining some antifreeze) and take the cover off that whole plastic assembly under the hood. It's a large cover that comes right up to the cowl and close to the wipers. You have to remove the long hood seal that stretches across the firewall left to right.
Now, there are many small screws (8mm head I believe and probably more than one size, 1/4" too I think) around the hood hinge and I believe one screw underneath the blower motor, so that has to be removed as well. Make sure you get all the screws and don't try to pry harshly. The plastic will break easily.
The unit is sealed and you must carefully break the seal all the way around the cover. After you have that removed you have to take another screw out on top of the heater core- it's a bracket that hold it down and pull the heater core carefully straight up- it will be a bit difficult but you must pull it out of the clip at the bottom. Wiggling back and forth may help a bit.
Now, install the new heater core by reversing the procedure, being careful not to break the plastic cover. Re-seal the cover with black silicone and use enough to be sure it will seal well. Re-attatch the heater hoses, install the blower motor, reconnect any wiring, fill the radiator with coolant and there you go!
What else can I help you with?
How do you take off a heater core on a 97 Pontiac grand am?
How to change a heater core on a 1997 Pontiac grand am
Heater core replacement 2002 Pontiac Montana?
Where is the heater core for a 2002 pontiac montana
How do you change the heater core on a Pontiac aztek?
To change the heater core on a Pontiac Aztek, locate the heater core on the firewall, passenger side of the vehicle. Remove bolts on the firewall and the clamps on the hoses. Take out the old heater core and replace with new. Tighten bolts and hose clamps. Then check to make sure the radiator is full of antifreeze.
How do you change the heater core in a 1985 Trans Am. There is no glove box.?
Remove the water supply lines to your 1985 Pontiac Trans Am heater core. Remove the heater core retaining bolts. The heater core will come out. Reverse the process to install your new heater core.
How do you replace heater core in a 2000 Pontiac grand prix?
where is the heater core at
How do you replace heater core in 2000 Pontiac grand prix?
where is the heater core at
Where is the heater core in a 1995 Pontiac Bonneville SE?
where is the heater core for a 1992 bonniville
Replacing heater core on 1997 Pontiac Bonneville?
Begin by training the water from your 1997 Pontiac Bonneville cooling system. Remove the heater core water supply hoses. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
Why is coolant leaking from the heater drain line on the engine firewall of a Pontiac sunfire?
heater core has a leak replace heater core
How do you repair the heater core to a '93 Pontiac Grand Am V6?
It is cheaper to replace the heater core than it is repair it
How do you change the heater core in a 1986 Pontiac Parisienne?
to changing the Heater CoreBasically you pop the hood and to the very back left corner, you will see two hoses going into a box looking thing against the firewall. You will see numerous bolts and screws. You must tear that apart to get to the heater core. First step is unclamping the two hoses. Once you've done that and gotten to the heater core its just like changing a radiator except smaller. You have to undo from the supports and hoses etc.... Somewhat simple, however lengthy and tedious. (May get really frustrating!)
How to replace heater core on 2004 Pontiac Grand Prix?
You can replace the sheer core, on your 2004 Pontiac Grand Prix, by removing the water lines. Remove the four bolts that hold the heater core in place. Reverse the process to install the new heater core.
