The veteran crew chief led the No. 71 Chevrolet team throughout its inaugural full-time season on the Sprint Cup tour.
Labbe has several offers on the table and is expected to make an announcement concerning his future on Monday.
GM Mike Brown has left TRG as well. Brown was a longtime fixture at Bill Davis Racing prior to joining TRG in March.
Brown says he has no formal plans but "several irons in the fire".
Career highlights for Labbe, a Saco, Maine native include winning the 1996 Sprint Cup championship with Terry Labonte and the 2003 Daytona 500 with Michael Waltrip. He also helped guide Jeremy Mayfield into the Chase for the Sprint Cup in 2005.
TRG Motorsports announced in November that former Cup champion Bobby Labonte would drive full-time for the team in 2010.
