Sheriff's deputies in Rowan County say warrants were issued for Harmon and the business partner on Monday. Authorities say the men are charged with breaking and entering and larceny after breaking and entering.
Investigators say the men allegedly stole at least seven vehicles from NASCAR's truck racer Jennifer Jo Cobb last year. Harmon once was the team manager for Cobb's Nationwide racing team.
The charges are a result of search warrants executed at a storage shed at a North Carolina location and at Harmon's shop in Mooresville on May 28.
Harmon surrendered in Shelby on Monday afternoon.
It was not immediately clear if he has an attorney.