Is your defective Cadillac CT4 actually a LEMON?

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Cadillac TSB #21NA130

2021 Cadillac CT4

TSB Document:

MC-10199283-9999.pdf

Affected Component: EXTERIOR LIGHTING

Summary: This service bulletin provides a repair procedure to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated, DTC P31E8, P31DB, P31D4 and/or P31E2 Set.

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Date Published: MAY 28, 2021
NHTSA TSB #: 10199283

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