Engine Coolant - GMC 1993 Sonoma Owner's Manual

How to Check
Lubricant:
I
1
I
KO998
If the level is below the bottom of the filler plug hole, you'll need to add
some lubricant.
If the differential is at operating temperature (warm), add enough lubricant to
raise the level to the bottom of the filler plug hole.
If the differential is cold, add enough lubricant to raise the level
to
1/2 inch
(1 2 mm) below the filler plug hole.
What to Use:
Refer to the Maintenance Schedule to determine what kind of lubricant to
use. See "Recommended Fluids and Lubricants" in the Index.
Engine 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.
The proper coolant for your vehicle will:
Give freezing protection down
to
-20°F (-29°C) or -34°F (-37°C) for
Give boiling protection up to 258°F (125°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Canadian vehicles and vehicles with the cold climate option.
Let the warning lights and gages work as they should.
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