GMC 2003 GMT560 T-Series Owner's Manual page 192

Item Number
15
16
17
18
19
20
21
22
23
* Refer to Maintenance Schedule.
** Applies to some vehicles.
*** Applies to air brakes only.
† Refer to Allison Transmission
$ Applies to hydraulic brakes only.
5-36
Item
Transmission-Automatic*,**,†
Propshaft Slip Joints
Propshaft U-joints
Rear Wheel Bearings*
Rear Axle*
Parking Brake Clevis Pin$
Master Cylinder$
Parking Brake Lever Pivot**, $
Clutch Release Cross Shaft**
®
Operator's Manual.
Remarks
Check fluid level.
One fitting each joint; lubricate with GM Part
No. 1051344 Wheel Bearing Lubricant.
One fitting each joint (1480 and 1550 Series);
lubricate with GM part NO. 1051344 Wheel Bearing
Lubricant. Two fittings each joint (1610) Series and
larger); lubricate with GM Part No. 1051344 Wheel
Bearing Lubricant.
Hand-pack or lubricate.
Fill to level of filler plug.
Apply chassis lubricant.
Fill 1/4 inch (6 mm) below opening.
Apply chassis lubricant.
One fitting each.