Can't tell you about the Smart Card thing, but I'll be watching the responses with you.
The synthetic lube in the rear end, a G80 Locker I'm guessing, is really expensive from GM. Posts I've read previously indicate the rear end holds just under four quarts, and the stuff is in the neighborhood of $29.00 a quart from GM.
There was another post saying the bottle of "Grape Juice" as it's called around hear, was only 23 oz, instead of a quart. Try running the part number on the GM parts direct web site and see what you come up with, but it seems too high from what I've seen posted here.
The synthetic lube in the rear end, a G80 Locker I'm guessing, is really expensive from GM. Posts I've read previously indicate the rear end holds just under four quarts, and the stuff is in the neighborhood of $29.00 a quart from GM.
There was another post saying the bottle of "Grape Juice" as it's called around hear, was only 23 oz, instead of a quart. Try running the part number on the GM parts direct web site and see what you come up with, but it seems too high from what I've seen posted here.