My Grandpa's brother, Arthur William Johnson died in Torrence and his obituary said he was buried there.
He was born 13 Dec. 1896 in Salt Lake City, UT and died 26 April 1948.
Is there a major cemetery in Torrance where I should start my search?

Welcome to the forums at Findagrave, Mark!

Torrance doesn't have it's own cemetery, but is surrounded by a number of them.

If you click on the Los Angeles County map and zoom in to the area of Torrance, you'll see the surrounding cemeteries that might be possibilities:

http://www.findagrave.com/cgi-bin/mapCems.cgi?countryer=4&stater=6&countyId=201

Clicking on one of the little red tombstone question marks will give a link to the related cemetery. Most will have phone numbers on the cemetery page. I checked Green Hills' online locator and didn't find him there.

I couldn't find an obit for him in the L.A. Times, so it was probably published in one of the smaller area papers (Daily Breeze or Long Beach Press-Telegram).

Of course, it's also possible that he was cremated and his ashes scattered. The best way to be sure might be to order a copy of his death certificate from the County Recorder's Office:

http://regrec.co.la.ca.us/Recorder/BDM_Records.cfm#death

You only need an Informational Copy, which does not require a notarized statement.

Good luck!

Thanks! Those are good places to start.

You're welcome, good luck!