Taste of the water. If it is sweet, it is coolant, and you have a leaking heater core. Replace it. If it is just water, you probably have a clogged A/C condensor drain line. Crawl under the vehicle passenger side and clean it out. In rare instances, the cowl drain holes are clogged. There may be an easier answer. Open the hood and remove the piece of plastic that is below the windshield. This panel allows access to the cabin air filter. There is a thick piece of rubber along the top where the plastic panel sits. on my car, this rubber seal had fallen in, allowing rain water to enter the cabin through the air filter. Put the seal back on the metal lip, and reinstall the plastic panel. probelm solved.
134a
Only the Olds Intrigue with the 3.5 L
Under the glove box.
5 quarts
Need clarification on what you are asking.
Dealerships or junkyards.
It's in the gas tank. If you need to change it, Google it or get a pro to do it. Fumes are dangerous. You can access it from the trunk under the carpet, near the back seat. Good luck Mars
On the passenger side of the engine, toward the front of the side. Near the alternator.
On the air intake filter box
I found one online for $55 dollars
Just remove the console and you can get to it.
Yes, it is called the OBD2 code list.