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Service bulletin 18348

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 id10212584
Published by NHTSA2022-05-31
Manufacturer's number18348
Manufacturer's date2018-11-08
NHTSA componentAIR BAGS; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM; EQUIPMENT

NHTSA's summary

Service Update. Some vehicles may set DTC P189D and display SERVICE SHIFTER SEE OWNER?S MANUAL on the Driver Information Center (DIC). When this message is displayed, the vehicle will go into N (Neutral) once the vehicle?s speed is below 6 mph (10 km/h), and then into P (Park) once the vehicles speed goes below 3 mph (5 km/h). The customer will be able shift and drive the vehicle per instructions in the vehicle Owner?s Manual. Dealers are to reprogram the engine control module (ECM) with an updated software and calibration.

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

Air bags, Electrical system, Engine, Equipment and accessories, Engine control module

Trouble codes named

P189D

Vehicles listed
CADILLAC XT42019

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

Other bulletins for the same vehicles and component
PIP5628F2023-05-15. Service bulletin. This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
21NA2572022-02-14. Service bulletin. This service bulletin provides a service procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3075 Set.
21NA2562022-02-14. Service bulletin. This service bulletin provides repair information for dealers/technicians to correct a customer concern of a Malfunction Indicator Lamp Illuminated with DTC P26BB Set.
21NA1392021-08-09. Service bulletin. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.