FYI
More on it >>>>herea>quote:
GM Introduces New Automatic Transmission Fluid For 2006 Cars and Trucks
* New factory-fill fluid standard in all 2006 MY Hydra-Matic transmissions
* Significantly improved viscosity, shift performance and fluid durability
* Available through GM Vehicle Care products as DEXRON®-VI
* Approved for service application on all prior model year Hydra-Matic automatic transmissions