How To Check Lubricant; Radiator Pressure Cap; Gasoline Engine - GMC T-Series 1999 Owner's Manual

How to Check Lubricant

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 "Recommended Fluids and
Lubricants" in the Maintenance Schedule.
Rear Axle Shift Motor (If Equipped)
When to Check and Change Fluid
If you have a controlled traction, or locking differential
type rear axle, a good time to check the fluid level in the
axle shift motor is when the rear axle lubricant is
checked. Use refrigerant oil (shift motor only).
How to Check Fluid
Remove the plug on the front plate of the axle shift
motor, add enough fluid to raise the level to the bottom
of the filler plug hole, then replace the plug.
What to Use
Refer to your Maintenance Schedule to determine what
kind of lubricant to use.

Radiator Pressure Cap

(Gasoline Engine)

Your cap is a 9 psi (62 kPa) pressure
be tightly installed. Be sure the arrows on the cap line up
with the overflow tube on the filler neck. This will
prevent coolant loss and possible engine damage
from overheating.
When you replace you radiator pressure cap, and
R
ACDelco cap is recommended.
yellowblue
-
type cap and must
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