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July 1, 2021 Service bulletin

Visibility: defroster/defogger/HVAC system: fan/motor

Cadillac technical service bulletin PIC6440 for 2018-2020 Cadillac CT6.

Bulletin number
PIC6440
Component
Visibility: defroster/defogger/HVAC system: fan/motor
Summary
This Preliminary information communicates that a calibration change was made starting with the 2018 model year so that the rear HVAC fan speed will also control the front fan speed.

Owners of these vehicles have filed 1 complaints in the visibility category.

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