For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

California Proposition 65 WarningCamshaft Intake and Exhaust Sprocket Replacement
Special Tools
EN-955-A Locking Pin
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
Remove the camshaft cover. Refer to Camshaft Cover Replacement.
Remove both camshaft p ...
Transmission Rear Mount Replacement
Removal Procedure
Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle.
Using a suitable jack stand, support the rear of the
powertrain.
Remove and DISCARD the transmission mount to bracket
through fastener (1).
Remove the transmiss ...
RAB system limitations
WARNING
The following limitations apply to the Rear Automatic Braking (RAB) system
in the Nissan Armada. Failure to fully understand and follow these limitations may
result in serious injury or even fatal accidents.
When the Nissan Armada approaches an obstacle while the accelerator or
b ...