In 1987, Hank learned that Rich Roehrs the Chevrolet, Oldsmobile, and Chrysler dealer in Gladwin, Michigan was preparing to retire. Hank purchased the dealership and Tim Bell became the General Manager and Partner. He served in that role until 1995. Thereafter, John Kirby became the General Manager and Partner.
In 1990, Hank and Tim Shannon, a long time Graff employee, purchased a Chevrolet, Buick, and Oldsmobile dealership in Fostoria, Ohio. Hank eventually purchased Tim's share of the dealership and in 1996, Jeff Cole became the General Manager and Partner. Several years later, the Pontiac, Cadillac, and GMC dealership in Fostoria was purchased and merged into the existing dealership. Unfortunately, following the recession in 2008 and General Motor's bankruptcy in 2009, the Fostoria dealership was the recipient of a wind down letter from General Motors and the dealership was closed.
In 1991, Hank and Keith Barnett purchased the Chevrolet, Buick and Oldsmobile Geo dealership in Sandusky, Michigan. In 1996, the dealership was moved to a brand-new facility on the west side of town. Keith served in that role until 2017 when his son, Sam Barnett became the General Manager and Partner.

In 1999, Hank purchased the former Schaffer Volvo and GMC Truck dealership which had locations in Flint and Saginaw. Keith Whitmore, Hank's son-in-law, became the General Manager and Partner in the new Graff Flint & Saginaw Truck Centers. Keith operated those dealerships and eventually became the sole owner. He sold the dealerships in 2019.
In 1999, Hank also acquired the Chevrolet, Pontiac, and Oldsmobile dealership in Durand, Michigan. Mike Benmark was made the General Manager and Partner and served in that role until he retired in 2012. In 2012, Chip Watt became the General Manager and Partner.
Also in 1999, Christopher Graff, Hank's son and a recent graduate of Michigan State University and Stetson University College of Law was promoted to General Manager in the Davison dealership. Chris subsequently purchased the dealership stock and is the Dealer Owner of Hank Graff Chevrolet in Davison.
In 2003, Hank purchased M&M Chevrolet in Mount Pleasant, Michigan. Wayne Wedding, the General Manager and Partner in the Bay City dealership became the Partner in Mount Pleasant and had oversight responsibilities for both dealerships. In 2007, Hank repurchased Wayne's interests in the Bay City and Mount Pleasant dealerships. Lisa Kusey-Rechsteiner has served as the General Manager since 2006. Lisa became the partner in 2012. In the Mount Pleasant dealership, Vickie Munday has served in the role of General Manager since 2019 and became the Partner in 2021.
Also in 2003, Hank purchased Ottawa Chevrolet in Ottawa, Ohio. Jeff Cole became Hank's partner and had oversight responsibilities for both the Ottawa and Fostoria dealerships. The Chevrolet dealership was moved from its aging facility to a newly renovated facility on Perry Road in 2004. Jeff left Graff organization in 2009. Mike Pauly became Hank's Partner and General Manager. Hank sold the Ottawa dealership in 2017.