The window relay is located in a 1999 Monte.

Thanks

 

most of the time the relay is in the dash or in the door. but on the newer cars it is actually apart of the switch . I have been trying to find mine also till i figured it out.
I wanted to change mone out to make bth windows go up and down with one touch. but you can still achive this with new regulators tapped in to each circut.
one relay for each fuction