I don't know if this is the same person, but I found a "Gunner Olaf BERG" in the Lake County, IL Veterans Buried Prior to July 1955. The listing reads as follows:
Buried in Pine View Cemetery, Benton TWP, Waukegan, IL
BERG, Gunner Olaf W-1 PFC Army 56 Guard Co ASC d. 3 May 1953
I didn't find an obituary, but I wasn't at the Waukegan library and wasn't looking in the Waukegan paper. If this is the same person that you're looking for, perhaps the date will help someone narrow down the search for the obit?