Sunroof or Sunshade Inoperative, DTC U1S1B Set – 2010-2015 Buick LaCrosse, 2011-2015 Buick Regal, 2012-2015 Buick Verano, 2011-2015 Chevrolet Cruze, 2012-2015 Chevrolet Malibu, 2015 Chevrolet Impala

The preliminary information bulletin addresses a condition where the sunroof or sunshade may be inoperative when the sunroof switch is pressed, and DTC U151B is set in the BCM. The issue is under investigation, and a software calibration change is being worked on. In the meantime, technicians can complete a specific procedure to resolve the concern. The bulletin also includes warranty information and labor operation times.

Summary

This bulletin applies to multiple models with sunroofs, including the 2010-2015 Buick LaCrosse, 2011-2015 Buick Regal, 2012-2015 Buick Verano, 2011-2015 Chevrolet Cruze, 2012-2015 Chevrolet Malibu, and 2015 Chevrolet Impala.

Important Notes

GM bulletins are intended for professional technicians only and are intended to provide information on conditions that may occur on some vehicles or to provide information that could assist in the proper service of a vehicle.

Manual:

Download: Sunroof or Sunshade Inoperative, DTC U1S1B Set – 2010-2015 Buick LaCrosse, 2011-2015 Buick Regal, 2012-2015 Buick Verano, 2011-2015 Chevrolet Cruze, 2012-2015 Chevrolet Malibu, 2015 Chevrolet Impala

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