Here is a link with pictures, tools needed and everything to do the job. http://www.v6z24.com/howto/heatercore
Yes
A Haynes or chiltons manual has the how to. Or do a search for a forum for Chevy corsica specific
yes
Remove the head and replace the gasket. No other way to fix it.
yes
the library should have a shop manual to make copies of for your vehicle...:)
pay me $75. lmuller2@ivytech.edu
* Remove the front bumper fascia * Unplug the electrical connector and remove the bracket bolt
You dont. You just have to remove the glove box insert.
no i can not answer this quiestion
2.2L Altenator on a 2.2L, AND, 2.4L on a 2.4L ONLY!
Possible leak in gas line. Must be some sort of air leak in the heater box under the hood. Heater is pulling fumes into car through the leak in it.