Rear Axle
When to Check Lubricant
It is not necessary to regularly check rear axle
fluid unless you suspect there is a leak or you hear
an unusual noise. A fluid loss could indicate a
problem. Have it inspected and repaired.
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, you will need to add some lubricant.
Add enough lubricant to raise the level to the
bottom of the filler plug hole.
What to Use
To add lubricant when the level is low, use
SAE 75W–90 Synthetic Axle Lubricant (GM Part
No. U.S. 89021677, in Canada 89021678) meeting
GM Specification 9986115. To completely refill
after draining, add Limited-Slip Axle Lubricant
Additive (GM Part No. U.S. 1052358, in
Canada 992694). See Recommended Fluids and
Lubricants on page 443. Then fill to the bottom
of the filler plug hole with the Synthetic Gear
Lubricant.
Bulb Replacement
For the proper type of replacement bulbs, see
Replacement Bulbs on page 374.
For any bulb changing procedure not listed in this
section, contact your dealer.
370
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