I have a '99 Malibu that I'm have an issue with the blinkers not working and the a/c fan not working on setting 1 or 2. I have read several listing on what is causing these problems, but does anyone know the part numbers and where exactly they are located in the car?

So you know that the problems are likely the Hazard Switch and Blower Motor Resistor? The turn signal "blinker" problem is likely this part but probably would have to do a bit more checking to be sure (do both left and right turn not work? Do the 4-way blinkers also not work?)

Both of these parts are part are inside vehicle part of instrument panel assembly. Both are not the easiest parts to access.

http://www.geocities.com/raj380/malibu_nolf/misc/blowerresistor.pdf

The second drawing of blower resistor shows it really well but it is from a weird perspective upside down. I put an arrow to show front of vehicle.

Actually the Hazard switch had a recall for some 2000/2001 model vehicles but not the 1999. I think you could only get that part at a dealer. The blower resistor is available other places from what I have read but I don't really know specific part numbers you would need, sorry.

Check out this other thread for the basic instructions for the Blower Motor Resistor:

http://www.automotiveforums.com/vbulletin/showthread.php?t=199000

The part number is not necessary. Just go to CarQuest (and I think Napa) and ask for the Blower Motor Resistor. This is a common problem with 97-03 Chevys, Olds, and Pontiac. The parts guy will know.

The one you need to take out is green, about 2 inches by three inches, and is a small computer board. The one you need to put in (improved part) is about three inches by 4 inches and has a black coating over the whole green "chip."

The whole job should not be more than $20 and an hour.