Clean all mating surfaces and apply GM sealant (Part No. 3997597).
Torque rear differential carrier nuts to 41 ft. lbs.
Torque upper arm bolts to 37 ft. lbs.
Torque propeller shaft flange bolts to 41 ft.lbs.
Fill axle with SAE 75W-90 hypoid gear oil and torque fill plug to 32 ft. lbs.