I want to insulate the computer panel on my 2003 saturn ion to keep from freezing over night. Can someone tell me where it is on the car?

INSIDE BY THE GAS PEDAL to the right behind the trim panel

Look to replace the TCM throttle control module

Check for other loose heat shields.
The shield you removed would allow more noise to enter the cabin too.

Look in the interior fuse block. It is located on the drivers side of the center counsel, just to the right or where our right leg would be. You will need to remove the trim panel. The fuses will be labeled on the inside of the panel. Page 5-96 http://www.saturn.com/content/dam/saturn/northamerica/usa/nscwebsite/en/Home/Owners/Owner_Resources/Manuals/en/us/2004/ion/2004-saturn-ion-owners-manual.pdf#page325

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Check the wires from the O2 sensors for worn insulation and bare spots. They are probably rubbing on the body somewhere and sending false signals to the computer. Hope this helps.

Check to make sure the button on the trunk latch is turned from manual unlock...they made that feature so only the key will work to open the trunk that way if someone breaks in the front of your car they can't hit the trunk release and get into the trunk...may be the same thing for your remote. Hope that helps.

You need to fill the expansion tank and the radiator with 50/50 mix, it will level itself out. There is no quantity, just fill it up. About 2 gallons.

Go to carhelpsite.com it is free as long as you click on 2 of the ads at the website then your questions will be answered by an ASE certified mechanic,you don't have to buy or fill out anything on the ads,so help keep the site free.

Sounds like a timing belt,, open the oil cap and look in there with a flash light,,
have someone turn the key if you see nothing moving in there then its the timing belt,,

MIGHT BE IN TRUNK UNDER SPARE TIRE COVER G5 IS IN THE SAME PLACE,CAN'T HURT TO LOOK.