From the CA death index:
JOSLIN GERTRUDE BLANCHE born 1910 04 15
mother PENFIELD father SWAN FEMALE born KS died SAN JOAQUIN county dod 1985 10 10 ss# 558149543 age 75

Galt is actually in Sacramento county.....
I checked the Lodi NewsSentinel on Saturday Oct. 12 and Monday Oct. 14, Tuesday Oct. 15th and nothing appeared
If she was a resident of Galt try contacting the Galt Herald

This is an on-line publication of
The Galt Herald
604 N. Lincoln Way,
Galt, CA 95632
209-745-1551.
For comments or questions, email us at editor_galtherald@herburger.net

Have you tried Findagrave?