GMC 1998 Savana Van Owner's Manual page 261

Rear Axle
What to Use
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 Services" in the Index.
How to Check Lu'_
- ~ I
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.
Refer to the Maintenance Schedule to determine what
kind of lubricant to use. See "Recommended Fluids and
Lubricants" in the Index.
Engine Coolant
The cooling s stem in your vehicle is filled with
DEX-COOL engine coolant. This coolant is designea
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km) whichever occurs first, if you add only
DEX-COOL6 extended life coolant.
The following explains your cooling system and how to
add coolant when it is low. If you have a problem with
engine overheating, see "Engine Overheating" in the
Index.
A 50/50 mixture of water and DEX-COOL@
coolant will:
2
0
Give freezing protection down to -34°F (-37°C).
Give boiling protection up to 265 " F (129" C).
0
Protect against rust and corrosion.
0
Help keep the proper engine temperature.
0
Let the warning lights and gages work as
they should.
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