2003 Buick Rendezvous AWD FLUID CHANGE?

[borninabarn]

moan/groan noise rear end?When turning in parking lot.
Hello,
I have a 2003 AWD BUICK RENDEZVOUS that I just purchased and it has 129,000.I did a service history at our local GM dealer and was told by them the rear end had been changed at 77,000 miles.This vehicle when you are turning slow in a parking lot it Moans or Groans in the rear end area?I think?I bought this vehicle from a used car dealer that I do know him.He told me that they added .7 of a bottle of GM Versa Trac fluid #12378514 and that is all it took.He gave me the rest of the fluid that was left and also an ALL DATA BULLITIN 06-04-114-001A.From what it reads as I read it shouldnt all the VERSA TRAC FLUID be replaced instead of just topping it off?I had ask him to replace the fluid for the versa trac.If anyone knows the correct way to do this let me know please and if you know How much fluid is needed for a complete change that would be great also.He told me th 16.9 FL. OZ.of VERSA TRAC FLUID was $32.Thanks for your time!Born

[borninabarn]

HELLO??? Any GM Techs out there that can help? DOES ANYONE KNOW HOW MUCH FLUID IS NEEDED TO COMPLETELY DRAIN AND REFILL THIS BUICK RENDEZVOUS AWD?????////////////////////////////////////////////THANKS FOR YOUR TIME! Or is there another web site that is BETTER than this one? For the question I am asking??If you are looking at my question and know of a site Please let me know!Thanks Born! MAYBE THE MODERATOR IS A CERTIFIED TECH? THAT CAN HELP? If there is one?