No overdrive on '03 automatic?

I thought the '02-'03 year automatics came with overdrive? My gearshift is only showing 4 gears, with no overdrive. I can't find any button on the gearshift or dash for overdrive, nor do see where it would light up on the dash. Yet Nissan claims this year model comes with overdrive on the automatics. Can anyone help me with this?
I took it out on I-95 this weekend and got it up to 120 and it didn't really seem like I needed to shift into another gear, but I'm not sure. This is the first automatic I've had in about 12 years, and damn do I miss my 5-spd! (kinda boring just sittin there with nothing to do!)
Oh well, least I finally figured out how to roll the windows down with the remote! :cool:

I'm not sure, but I think that the 3 acts like the overdrive button. When you need some more umph just put it on 3rd.