Chevrolet 2005 Uplander Owner's Manual page 356

What to Use
Refer to the Maintenance Schedule to determine what
kind of lubricant to use. See Recommended Fluids
and Lubricants on page 6-12.
Carrier Assembly-Differential (Rear
Drive Module)
When to Check and Change Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant and when to change it. See
Scheduled Maintenance on page 6-4.
5-44
How to Check Lubricant
To get an accurate reading, the vehicle should be on a
level surface.
If the level is below the bottom of the filler plug hole,
located on the differential, you will need to add some
lubricant. Add enough lubricant to raise the level to the
bottom of the filler plug hole. A fluid loss could indicate a
problem; check and have it repaired, if needed.
What to Use
Refer to the Maintenance Schedule to determine what
kind of lubricant to use. See Recommended Fluids
and Lubricants on page 6-12.