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 
, and an
Advisor can run a check.
See also:
Customer Assistance Offices
Buick encourages customers to call the toll-free
number for assistance. However, if a customer
wishes to write or e-mail Buick, the letter should be
addressed to:
United States — Customer Assist ...
Door Ajar Light
This light comes when a door is open or not securely latched. ...
Washer Fluid
What to Use
When windshield washer fluid is needed, be sure to read the manufacturer's instructions before use. If operating the vehicle in an area where the temperature may fall below freezing, use ...