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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.

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Only bulletins with component: Fuel system are shown. Show all

Bulletins, newest first
20NA0982020-06-22. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. This informational bulletin explains to the tech on how to order a new fuel injector by matching the part number on the part and ordering it from the EPC.
16NA3832020-06-22. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
16NA3832020-03-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM. This informational bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
N182205890 022019-12-30. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; FUEL SYSTEM, GASOLINE; EQUIPMENT. N182205890-02 - Service Update. Certain vehicles may have a condition where some capacitors used on the purge pump printed circuit board (PCB), may have unknown performance. These suspect capacitors are used in multiple locations on the PCB. Depending on which capacitors fail, the purge pump may not operate as intended and a malfunction indicator lamp (MIL) may illuminate. Dealers are to replace the evaporative emission purge pump.
050604022Q2019-07-29. Service bulletin. FUEL SYSTEM, DIESEL; FUEL SYSTEM, GASOLINE. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
N1822013002019-06-24. Service bulletin. FUEL SYSTEM, GASOLINE. Customer Satisfaction Program. Certain vehicles may have a condition in which the fuel gauge does not accurately reflect the amount of fuel in the tank (may be overfilled or underfilled). A malfunctioning fuel level sensor may result in an incorrect gauge and the vehicle may run out of fuel unexpectedly. Replace the fuel tank sending unit.
PIP56492019-06-10. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE. This Preliminary information communicates to the dealer that a customer may comment that their MIL is illuminated due to a P0299 set current or in history. It contains diagnostic tip information related to a potential empty fuel level concern.
PIP5569A2019-06-03. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE. This Preliminary information communicates to the dealer an issue where the vehicle's engine may crank over unprompted and not start afterward. This is the result of hooking up the Active Fuel Injector Tool incorrectly on vehicles equipped with a direct fuel injection system. This Preliminary information instructs the dealer of a repair kit they received that will prevent this issue when installed correctly.
PIE05172019-04-22. Service bulletin. FUEL SYSTEM, OTHER:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS; FUEL SYSTEM, GASOLINE. This engineering informational bulletin is requesting information on product issue with the Evap/Fuel Line Connections and the engineer is requesting pictures.
050604022P2019-04-22. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; FUEL SYSTEM, GASOLINE; FUEL SYSTEM, DIESEL. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.

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