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January 30, 2015 Service bulletin

Electrical system: software

Buick technical service bulletin PIC5910A for 2014-2015 Buick Lacrosse.

Bulletin number
PIC5910A
Component
Electrical system: software
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have a Diagnostic Trouble Code B124B sym 04 stored in the Human Machine Interface module. For model year 2014 the Human Machine Interface should be reprogrammed with the latest calibration from TIS2Web. For model year 2015 engineering is currently working on new calibrations to correct this concern.

Owners of these vehicles have filed 23 complaints in the electrical category.

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