GMC TopKick 2007 Owner's Manual page 302

Tandem Axle Models
302
Item
Item
Number
1 Brake Camshafts
2 Propshaft U-Joint
3 Rear Axles
Brake Shoe
4
Roller Pins
5 Rear Spring Pin
Remarks
One fitting each.
One fitting
each joint.
Lubricate with GM
Part No. 1051344,
Wheel Bearing
Lubricant
Fill to level of
filler plug.
Apply engine oil
at pin to shoe
joint only.
One fitting
each side.