Did my Alero come with Keyless Entry?

[Runaboveit]

I bought a 2001 Alero, and the person selling it only had one original olds key and a copy. No remotes.

It's a GL according to the title, 4 door, cruise, CD player, power W&L, cloth.

I also notice if I push the lock button once before I get out until it chimes and then get out and close the door, it automatically locks after I get out and the lights flash.

Was keyless and option on the GL's or 2001's?

Or does anybody know where the box i'm assuming for the keyless transmitter is located. I imagine I could just check and see if there is one, and then I'll know.

And If I do have it, how can I find out what version remote I need to purchase?

Any advice is appreciated, thanks!