Yea, I'm with the other guy. But there are two other alternatives, one which involves not taking out the dash. I'm assuming your heater core is shot and leaking and that's why you need to change it, so here are your two options: 1. Get a copy of the Haynes repair manual at your local Napa Auto Parts or whatever you have around there, then follow the instructions in the chapter for your heating, ventilation and air conditioning systems. It'll take time, but it'll be cheaper than the dealership. The most you'll need is a new core (from anywhere) and maybe some new hosing. 2. Pop open the hood and find the two hoses that connect into the back of the firewall (going to the heater core itself). They'll be near the blower motor. Then go to Napa and get a fitting with two ends on it for that size of hose. Drain the coolant from the system, undo both of the hoses (WITH THE ENGINE COLD!), be sure to catch the antifreeze that falls, and install that fitting you just bought. This'll bypass the heater core effectively eliminating your problem, but also your heat. So if you live in a state like Montana, I'd go with a dealership or option 1. Good luck!