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.
The proper level is from 0 to 3/8 inch (0 to 10 mm) below the bottom of the filler plug hole, located on the rear axle.
What to Use
To determine what kind of lubricant to use.
See also:
Accessories and Modifications
When you add non-GM accessories to your vehicle
they can affect your vehicle’s performance and
safety, including such things as, airbags, braking,
stability, ride and handling, emissions systems, ...
Dual Automatic Climate Control System
A. Driver and Passenger Heated Seats (If Equipped)
B. Driver and Passenger Temperature Controls
C. Air Delivery Modes
D. Heated Steering Wheel (If Equipped)
E. Recirculation
F. Air Conditi ...
SBZA Error Messages
The following messages may appear in the DIC:
SIDE BLIND ZONE ALERT SYSTEM OFF: This
message indicates that the driver has turned the
system off.
SIDE BLIND ZONE SYS. UNAVAILABLE: This
message ...
