Of Chelsea, Michigan, formerly of Grosse Ile, age 82, passed away Sunday, January 25, 2026 at Trinity Hospital, Ann Arbor. He was born March 4, 1943 in Detroit, Michigan, the son of Donald Leo & Thelma Louise (Hartnett) Diemer.Greg graduated from Lincoln Park High School, and attended Henry Ford Community College. He worked for Mack Truck for a short time, and then worked for Ford at the RenCen and in Dearborn. Greg attended Immanuel Bible Church in Chelsea for many years. He liked to play Euchre and ping pong at the Chelsea Senior Center. Greg was very family focused, and enjoyed his grandkids and nieces and nephews. He coached soccer and baseball with his boys. Greg had a great sense of humor which he never lost, even in the end.
On May 15, 1971, he married Sandra Allen, and she survives. He is also survived by his sons, Matthew (Jennifer) of Okemos, Timothy (Molly) of Bloomfield Twp., Patrick (Angela) of Climax; 7 grandchildren, Isaac, Eleanor, Henry, Oliver, Jackson, Brady, Elijah; and many nieces and nephews. He was preceded in death by his brother, Donald.
Funeral services were held Tuesday, January 27, 11:00 am at Cole Funeral Chapel, Chelsea, with Rev. Jeff Heim officiating. The family received friends Tuesday, 10-11 am. Memorial contributions may be made to Immanuel Bible Church.
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