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The heater core is located directly behind the console. It is the easiest to access that I have ever seen. First, drain the coolant. Remove the side cover on the passenger side, that is the panel where your left foot would contact if you were in the passnger seat. It is held on with velcro. You will then see the aluminum heater core with two lines going into it. These lines are pushed in and then have a goofy retaining clip to hold them in place. First remove the plastic clip that holds the core in. It is held in place with one Philips head screw. Now the plastic retainers that hold the tubes in place must be removed. I inserted a small screw driver into the opening and they flipped open. The tubes can now be pulled out of the core. Thet are held in by friction. There is a Teflon backer ring and a rubber o-ring on the end of each tube. I had to pull pretty hard and at the same time push forward so the tubes would move forward through the firewall. Once the tubes are removed, the core can be slid out. No tools required. There will probably a lot of coolant leaking out, so make sure yuou have rags and towels in place to protect the carpet. Slide in the new core. I think the o-ring and backer should be replaced. I am doing this right now and plan on going to the GM dealer tomorrow to see if they have them. That's all I got for now!
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∙ 12y ago
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