Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems.
It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System.
If a diagnostics check is needed between e-mails, push 
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Advisor can run a check.
See also:
Removal and Installation of the Sealant Canister
To remove the sealant canister:
1. Unlock the air only hose (F) from the tire sealant canister (B) by pulling
up on the lever.
2. Pull the air only hose (F) from the tire sealant canister (B).
...
Trunk Release
The remote trunk release button
is on the driver door, inside the
storage compartment under the
armrest.
Vehicles with an automatic
transmission, the shift lever must
be in P (Park) or N ...
Engine Oil Pressure Light
Notice: Lack of proper engine oil maintenance can damage the engine. Driving
with the engine oil low can also damage the engine. The repairs would not be covered
by the vehicle warranty. Check t ...