Question about 1999 Pontiac Grand Am GT

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How to replace heater cor - 1999 Pontiac Grand Am GT

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  • markov Aug 09, 2008

    Hello. Just want to see if I'm going in the right direction. 1997 Grand Am 2.4. Leaking Antifreeze at the firewall out of a drain next to the supply and return of the Heater core. Assuming heater core = blown, and needs replacing. I checked your best solution to Bullfrog75 about the bypass. Is this also ok for the 2.4OHVC ?

    Thanks for your time and input...

    Pete

  • masigran Aug 09, 2008

    My 1995 Grand Am is overheating and blowing antifreze out overflow cap. and behind the front pasenger wheel and on drivers floor. I have replaced the thermistat.Have flushed the rad. water flows freely through the motor and rad. The fan in motor is working fine. I am going to be trying to replace the heater core this weekend.could use some advice. It is a backyard project as I cannot afford a machanic.Not sure how big a job it is going to be or even where to find the heater core or what I have to do to get to it. Any help and advice would be appreciated. masigran@hotmail.com

  • brickx2 Aug 26, 2008

    I have the same problem but it seems unlike most cars you can't get at the heater core through the back of the radio/climate control panel. How do i get at it?

  • Tony Hutson
    Tony Hutson May 11, 2010

    The depends on year model. Can you give us more information?

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The heater core is located forward of the glove box to the left of the fan. the process for changing it is not complex, but if you have A/C, you will have to use caution not to disturb the system unless you can reservice it yourself. Once the the heater core cover is removed, you should see both that and the evaporator coil (towards the front). Just pop the clip and remove the core.
I would recommend getting the Haynes manual for your vehicle.

Hope this helps.

Posted on Aug 31, 2008

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