Overheating Question

I have a 99 Alero with a 3.4l v6 and automatic tranny.
I got an over heating problem that has stumped me.

I just replaced the waterpump. therostat, and radiator cap, refreshed the coolant and It overheated coming to work this morning.

I idled the car after I changed everything and and the fan kicked on and I though all the relays were working, etc.

Looking for suggestions, maybe the radiator?

Thanks in advance for any help.

Ken

Two things, air in the system or a bad radiator. Air in the system will cause it to overheat so make sure you bled all the air out of the system. If that has been done then the radiator may be blocked internally.

I was going down that road with my trouble-shooting.
Thank you very Much!