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Service bulletin PIC6374

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10168961
Published by NHTSA2019-12-09
Manufacturer's numberPIC6374
Manufacturer's date2019-11-12
NHTSA componentENGINE AND ENGINE COOLING; SERVICE BRAKES

NHTSA's summary

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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Engine

Vehicles listed
CADILLAC XT42019, 2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20204522020-09-24. Brakes
20V5880002020-09-24. SERVICE BRAKES

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
00-06-01-026R2025-12-03. Service bulletin. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
23-NA-1532025-10-25. Service bulletin. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
15-NA-0102025-07-07. Service bulletin. This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in other states.
21-NA-2402025-06-16. Service bulletin. This service bulletin provides diagnostic repair information to correct an oil leak in the engine.
25-NA-1002025-06-12. Service bulletin. This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California Emission State may be entitled to the 7 year, 70,000-mile Emission Select State Component Limited Warranty.
24-NA-1392025-06-07. Service bulletin. This service bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Malfunction Indicator Lamp (MIL) Illuminated – DTC P023F or P129F Set.
21-NA-1392025-05-01. Service bulletin. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
25-NA-0522025-04-28. Service bulletin. This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to oil in system.
25-NA-0652025-04-24. Service bulletin. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
25-NA-0522025-04-10. Service bulletin. This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to oil in system.