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November 12, 2021 Service bulletin

This service bulletin provides a procedure to install a winter grille cover to correct the customer...

Cadillac technical service bulletin 21NA229 for 2019-2021 Cadillac XT4.

Bulletin number
21NA229
Component
Structure: body: bumpers: active shutters/grill
Summary
This service bulletin provides a procedure to install a winter grille cover to correct the customer concerns of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing, Malfunction Indicator Lamp (MIL) Illuminated.

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