Silverado 3500 4WD V8-6.0L VIN U (2004)
Fluid - M/T: Fluid Type Specifications
Transmission Fluid
5-SPEED WITH LOW GEAR (RPO MW3)
Grade ............................................................................................................................................................................................................. GL-4 Synthetic
Viscosity ................................................................................................................................................................................................................... 75W-90
5-SPEED WITHOUT LOW GEAR (RPO MG5)
Fluid Type ................................................................................................................................................. Synchromesh Transmission Fluid P/N 12345349
6-SPEED
Fluid Type ....................................................................................................................... Synthetic Transmission Fluid approved for Allison Transmission