Ph 3593 a
The Fram Filters cross reference guide lists two replacements for AC-Delco tf242. They are Fram FT1122A and Fram FT1122.
AC Delco P 115
pf46e
PH1279
pf1218
PF1233
PH3980. Go to www.fram.com and click on parts tab. You can cross reference from there
AC Delco - PF2135 FRAM - PH6017a
That would be a CH9018.
c-21p
ph20 or ph20a
ph 25