Front Axle; Rear Axle - GMC 2013 Savana Owner's Manual

2. Fill Plug
If the level is below the bottom of
the fill plug hole, on the transfer
case, some lubricant will need to be
added. Add enough lubricant to
raise the level to the bottom of the
fill plug hole. Use care not to
overtighten the plug.
Refer to
determine what kind of lubricant
to use.
Refer to the Maintenance Schedule
to determine how often to check the
lubricant and when to change it.
See
.
To get an accurate reading, the
vehicle should be on a level
surface.
to
If the level is below the bottom of
the fill plug hole, some lubricant
may need to be added.
When the differential is cold, add
enough lubricant to raise the level to
10 mm (3/8 in) below the fill
plug hole.
When the differential is at operating
temperature (warm), add enough
lubricant to raise the level to the
bottom of the fill plug hole.
Refer to
determine what kind of lubricant
to use.
Refer to the
to determine how
often to check the lubricant.
to