Re: William Dreyer, 1919 - 1985, Illinois
Your grandfather is on the SSDI
According to it he died in 1985. His last residence was Park Ridge, Cook County, Illinois.
The Social Security Administration will sell you a copy of an SSN application for $27. It is better than a death certificate because the person himself / herself filled it out while he/she was still living. SSN applications have the person's name, birth date and birth place; mother's maiden name, father's name; place of employment, job title and home address at the time of application.
Click on "SS-5" on the SSDI site and the wizards at Roots Web will even format a letter to the SSA for you.
You could also try for an obituary by writing to or visiting the library in Park Ridge. If you write, send them a SASE and a small donation. They will need the exact death date, too. You can get that from the state of Illinois or from Elsie, if she is still in her right mind and talking to you. If she isn't, you needn't say so in public.