I found a man named Austin Hollenbeck who is buried in South Whitley, Indiana. https://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=32923588
His death certificate matches the information for your Austin Hollenbeck, parents born in Pennsylvania (per census records) and where he was born and year.
"Michigan Deaths and Burials, 1800-1995," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FHW5-KLG : 9 December 2014), Austin Hollenbeck, 13 Jan 1934; citing Twp. Of Constantine, Mich., reference Pg 301 No. 2; FHL microfilm 1,940,441.
Problem is the death date, unless you have that incorrect. Here is the census record that indicates his parents were born in Pennsylvania
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M99P-FGB : accessed 28 April 2017), Austin Hollenbeck, Smith Township Churubusco town, Whitley, Indiana, United States; citing enumeration district (ED) 117, sheet 8A, family 192, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,414.