Rear Axle; Four-Wheel Drive - GMC 2003 Sonoma Owner's Manual

Rear Axle

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 Part A: Scheduled Maintenance Services on
page 6-4 .
How to Check Lubricant
To get an accurate reading, the vehicle should be on a
level surface.
5-52
If the level is below the bottom of the filler plug hole,
you'll need to add some lubricant. Add enough lubricant
to raise the level to the bottom of the filler plug hole.
What to Use
Refer to the Maintenance Schedule to determine what
kind of lubricant to use. See Part D: Recommended
Fluids and Lubricants on page 6-33 .

Four-Wheel Drive

Lubricant checks in this section also apply to these
vehicles. However, there are two additonal systems that
need lubrication.
Transfer Case
When to Check Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant. See Part C: Periodic
Maintenance I nspections on page 6-31 .