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Service bulletins for the 2020 Cadillac XT4

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

758 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
PIT57242020-01-21. Service bulletin. ENGINE. This Preliminary information communicates to dealers that if the SES/MIL light is on and there are multiple communication codes stored to inspect the engine harness between the power steering gear and the rear of the transmission case.
N1922736402019-12-30. Service bulletin. FORWARD COLLISION AVOIDANCE; ENGINE; ELECTRICAL SYSTEM. N192273640 - Service Update. Certain vehicles may have an engine control module that does not process the axle torque reduction command intended to assist with the collision imminent braking feature. In certain conditions when the collision imminent braking feature is engaged, there may be an increase in stopping time and distance. Dealers are to reprogram the engine control module.
PIE0537A2019-12-16. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards.
PIC63742019-12-09. Service bulletin. ENGINE AND ENGINE COOLING; SERVICE BRAKES. This Preliminary information communicates to the dealer a GDS2 error message (see below) might occur when trying to deactivate the boost system when preforming the hydraulic bleed procedure. This concern could be caused by the B20 Brake Fluid Level Switch Connector and the B34D Engine Coolant Temperature Sensor 4 Connector have been swapped.
010601011K2019-11-25. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
PIE05372019-10-28. Service bulletin. ENGINE AND ENGINE COOLING. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a check engine lamp illuminated and DTC P0451 set.
090604026R2019-09-23. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
070601016F2019-09-23. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement.
000601026M2019-09-23. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.