I have an 05 ss/sc what other trans fluid can I use besides the saturn stuff? Can I use royal purple or anythingelse? Help please.

 

BEST CASE: Use only the GM fluid can be gotten from the Chevy dealer Gear oil part number 21088899

otherwise Silkolene 75w90 GL 4
Castrol BOT 063 GL 4
MObil 75w90 GL5 if you cant get the other stuff

IMHO dont use royal purple