GMS Racing on Wednesday afternoon announced the team had parted ways with Sauter, who obtained the Truck series name during his inaugural season with the organization in 20-16.
“We cannot thank Johnny enough for his gifts to the growth and victory of GMS Racing,” Mike Beam, team president, said in a statement.
“He also won the first championship for people added plenty of trophies to the shop. We need him all the best for his future endeavors, both in and out of racing.
No reason was given by GMS Racing for the move.
In three seasons in GMS, Sauter had won 13 races. His six-race season in 2018 has been the most victories in 1 season during his 10-plus year career in the Truck series.
In the statement, GMS said statements about the potential for its No. 21 team can come in a later time.
Multiple sources also have told Motorsport.com that Brett Moffitt — that obtained the 2018 series championship with Hattori Racing Enterprises — would be the major candidate to take over the ride in GMS.
Moffitt has stayed with out a ride as winning the championship last November in Homestead, Fla..
In his NASCAR career, Sauter, 40, has 23 wins and seven poles in 244 Truck starts. He has won three races in the NASCAR Xfinity Series.