Someone PLEASE help me reset my clock!

I recently purchased a 2001 Cavalier. I have tried every combination (except the right one) to change the clock on my radio. This radio has no cassette or CD player - it is a very basic car. I am hoping someone here will know how to do this - it's driving me crazy having the wrong time! I obviously don't have a user's manual.

Thanks for your help,
Jane

fudge.... i know you have to hold 2 buttons down at once i think... i'm just trying to remember when i had just a radio in my 99....if you don't get an answer by tonight around 10-11 ish i'll have it for you... i just need to look at my old deck..

Ok, I'll check back in later. Thanks!
Jane

on the one off my 99 i had to hold the seek scan buttons down together..