GMC T-Series 2007, Owner'S Manual

Page: 241 / 356

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 Scheduled Maintenance on
page 295.
Notice: If you drive your vehicle through deep
water that is higher than the front or rear axle,
water may enter the axle housing and cause
the axle lubricant to break down. This could
damage the gears inside. Avoid driving your
vehicle through deep water.
You should avoid driving your vehicle through
deep puddles or standing water. If you must drive
through water that is higher than the front or
rear axle, see your dealer immediately afterward
to have the condition of the axle lubricant checked.
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 rear axle, 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 C:
Recommended Fluids and Lubricants on page 321.
HD2 Axle
241