CTS RWD V6-3.6L (2008)
Specifications (See: Specifications/Fluid Type Specifications/Lubrication Specifications) .
5. Inspect the gear lubricant level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
6. Install the fill plug to the differential.
Tighten the fill plug to 39 N.m (29 lb ft).
7. Lower the vehicle.