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Service bulletins for the 2019 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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
25-NA-0652025-04-24. Service bulletin. STEERING; SERVICE BRAKES; FUEL/PROPULSION SYSTEM. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
21-NA-0432025-02-12. Service bulletin. VISIBILITY/WIPER; SERVICE BRAKES; ENGINE; ELECTRICAL SYSTEM; WHEELS. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
21-NA-0432024-12-10. Service bulletin. STRUCTURE:BODY; WHEELS; ENGINE; SERVICE BRAKES; UNKNOWN OR OTHER. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
22-NA-2442024-05-30. Warranty extension. ELECTRICAL SYSTEM; EXTERIOR LIGHTING; STRUCTURE:BODY; UNKNOWN OR OTHER; SERVICE BRAKES. This service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
PIP5596A2024-04-15. Service bulletin. SERVICE BRAKES; FUEL SYSTEM, GASOLINE. This Preliminary information communicates that when removing the fuel line jumper hose care should be taken to be sure the line is reinstalled correctly to avoid a no/low fuel pressure situation.
22-NA-2472023-05-04. Service bulletin. SERVICE BRAKES; ELECTRICAL SYSTEM. This service bulletin provides information to dealership personnel that after performing a brake inspection, brake pad replacement, or any other repair that requires the caliper piston to be reseated may be causing DTC C05B0 to falsely set for eBoost applications.
22-NA-2472022-12-24. Service bulletin. SERVICE BRAKES, HYDRAULIC. This service bulletin provides information to dealership personnel that after performing a brake inspection, brake pad replacement, or any other repair that requires the caliper piston to be reseated may be causing DTC C05B0 to falsely set for eBoost applications.
15-00-89-004E2022-10-11. Service bulletin. POWER TRAIN; SUSPENSION; ENGINE AND ENGINE COOLING; SERVICE BRAKES, HYDRAULIC; STEERING. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
PIT5569B2022-08-15. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR. This Preliminary information communicates direction and examples when diagnosing multiple DTCs, one of which includes U**** Byte 71 DTC.
PIP5841A2022-06-13. Service bulletin. BACK OVER PREVENTION; SERVICE BRAKES. This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
070316004D2022-06-13. Service bulletin. SERVICE BRAKES. This service bulletin provides information for tire pressure monitoring (TPM) system concerns.
21-NA-0432022-06-02. Service bulletin. FUEL SYSTEM, GASOLINE; SERVICE BRAKES; ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL; WHEELS. This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
18NA0672022-05-31. Service bulletin. SERVICE BRAKES. This service bulletin provides information for cleaning brake dust off of aluminum or chrome wheels.
PIP4723F2022-02-14. Service bulletin. SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, GASOLINE. This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.
N182202760 Deale2022-02-07. Service bulletin. FORWARD COLLISION AVOIDANCE: DYNAMIC BRAKE SUPPORT/BRAKE ASSIST; SERVICE BRAKES, HYDRAULIC. Customer Satisfaction Program. Added approximately 1550 additional vehicles.
PIE0564A2021-03-08. Service bulletin. EQUIPMENT; SERVICE BRAKES, HYDRAULIC:FLUID. This engineering information (EI) bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards a brake fluid leak being detected with DTC C2A22 Symptom 00 Set.
PIE05642020-06-01. Service bulletin. SERVICE BRAKES. This engineering information (EI) bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards a brake fluid leak being detected with DTC C2A22 Symptom 00 Set.
20NA0862020-05-26. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER. This informational bulletin provides information about a GDS2 error message being on due to connector being swapped during reassembly.
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.
19NA2082019-10-28. Service bulletin. SERVICE BRAKES. This technical bulletin provides repair information to correct a customer concern of hearing a brake squeal Noise in cold weather conditions.
19NA0922019-08-26. Service bulletin. SERVICE BRAKES, HYDRAULIC:POWER ASSIST; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This technical bulletin provides repair information to correct a customer concern of Rear Park Assist Inoperable.
N1822027602019-06-24. Service bulletin. SERVICE BRAKES. Customer Satisfaction Program - Certain vehicles under certain conditions when traveling at low speed from a stop, the power brake assist system may not activate. The brakes will continue to function, but additional brake-pedal pressure may need to be applied to brake the vehicle. In addition, the Service Brake Assist, Electronic Stability Control, Traction Control, and ABS lights will turn on. Dealers will reprogram the Brake System Control Module (BSCM).
18NA3542019-04-22. Service bulletin. SERVICE BRAKES, HYDRAULIC. This Technical bulletin provides a procedure to correct a High Pitched Buzz Noise During Brake Apply condition.

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