OnStar Services

See also:

Power Liftgate
On vehicles with a power liftgate, the vehicle must be in P (Park) to operate. The taillamps flash when the power liftgate moves. WARNING You or others could be injured if caught in the path of th ...

When to Check and Change Automatic Transmission Fluid
A good time to check the automatic transmission fluid level is when the engine oil is changed. Change the fluid and filter at the intervals listed in Maintenance Schedule on page 11‑3 and be su ...

DIC Buttons
MENU: Press this button to get to the Trip/Fuel Menu and the Vehicle Information Menu. : Use these buttons to scroll through the items in each menu. A small marker will move along the page as ...