Your satisfaction and goodwill are
important to your dealer and to
Buick. Normally, any concerns with
the sales transaction or the
operation of the vehicle will be
resolved by your dealer's sales or
s
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 and Puerto Rico
Buick
Online Owner Experience
(U.S.) my.buick.com
The Buick online owner experience
allows interaction with Buick and
keeps important vehicle-specific
information in one place.
Membership Benefits
: Downloa
HEADLIGHTS/DAYTIME RUNNING LIGHTS (DRL) WIRING SCHEMATICS
Controls and Indicators
Halogen Lamps and Daytime Running Lamps (T4A)
Left LED Headlamp Power, Ground and Serial Data (T4L)
Left LED Low Beam Lamps, Cornering Lamp and Cooling Fan (T4L)
Left LED High Beam Lamps, and High Beam Spot (T4L)
NOTE: The following steps must be completed before using the symptom
tables:
1. Perform the Diagnostic System Check - Vehicle before using the HVAC System
Malfunction
procedure in order to verify that all of the following are true:
There are no DTCs set.
The control modules can communicate via