I don't think the correct code has been quoted for this Serial Number GM020532635684
I think 6833 refers to Serial Number GM020510055401... which is an older unit which is in the available Delco database
Unfortunately GM020532635684 is not in the available data
GM020532635684
This code will only be available from your Main Dealer or taking it into a Radio Decoding Service
olay, thank you 👍🏻