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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 6-11.
Then fill to the bottom of the filler plug hole with
the Synthetic Gear Lubricant.
Headlamp Aiming
Headlamp aim has been preset at the factory and
should need no further adjustment.
However, if your vehicle is damaged in a crash, the
headlamp aim may be affected. Aim adjustment to the
low-beam headlamps may be necessary if oncoming
drivers flash their high-beam headlamps at you
(for vertical aim).
If the headlamps need to be re-aimed, it is
recommended that you take the vehicle to your
dealer/retailer for service.
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