Sierra 1500 4WD V6-4.3L (2008)
Fluid - M/T: Fluid Type Specifications
MANUAL TRANSMISSION FLUID
Tremec 5-Speed RPO M96 ...................................................................................................................................... 5W-30 Synthetic Oil GM P/N ET-M99
Tremec 5-Speed RPO TZO .............................................................................................................................................. 1874 MTX Fluid 12550 ET-M81