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Service bulletins for the 2020 Cadillac CT5

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.

898 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
16NA2222020-11-30. Service bulletin. ENGINE. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
PIP57602020-11-16. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates the possibility of a flutter noise that can be transmitted through the engine mounts when the vehicle is operating in AFM mode.
20NA1912020-10-26. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This technical bulletin provides repair information to correct a customer concern of Auto Start/Stop Disabled with Malfunction Indicator Lamp (MIL) Illuminated and DTC U0599 set.
18NA1152020-10-26. Service bulletin. ENGINE AND ENGINE COOLING. This Bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set.
PIP57552020-10-19. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates the possibility of a engine oil leak that may occur at the cam carrier gasket T joint area due to improper amount of sealer be applied
PIP5733C2020-09-14. Service bulletin. ENGINE. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
PIP5733B2020-09-14. Service bulletin. EQUIPMENT; ENGINE. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
16NA3382020-08-31. Service bulletin. ENGINE; POWER TRAIN. This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.
PIP5095G2020-08-10. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon and may also have an oil or coolant leak. Technician may find coolant or oil in a spark plug tube. If the Spark Plug Tube is leaking and it is determined that the oil or coolant is not coming from a leak above the spark plug then replace the cylinder Head, spark plug and coil.
PIP5257E2020-08-10. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have oil mixed in with the engine coolant. Technician will need to inspect the oil cooler if equipped for possible leaking into the cooling system through the radiator. If no issue found replace the engine as well as all rubber coolant hoses. Also updated to include ALL HFV6 engines Gen1 and Gen2.
PIP5693B2020-08-10. Service bulletin. ENGINE. The Preliminary Information communication advises the technician that the Product Quality Center has a part restriction for the E99 Engine Control Module. The dealer technician is advised to call the GM Product Quality Center for further assistance.
PIE0559A2020-08-10. Service bulletin. ENGINE AND ENGINE COOLING. This engineering information (EI) closure ends the need for information from technicians/field in regards to engine oil found under their vehicle.
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.
PIP57302020-06-15. Service bulletin. ENGINE. This Preliminary information communicates additional diagnostic information for DTC's P0016 and P0018.
PIP5257D2020-05-11. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have oil mixed in with the engine coolant. Technician will need to inspect the oil cooler if equipped for possible leaking into the cooling system through the radiator. If no issue found replace the engine as well as all rubber coolant hoses. Also updated to include ALL HFV6 engines Gen1 and Gen2.
PIE05592020-05-04. Service bulletin. ENGINE. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to engine oil found under their vehicle.
20NA0682020-04-27. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. This technical bulletin provides repair information to correct a customer concern of Service Engine Soon message with the following DTCs set: P00FF, B2B05, B2B06.
PIP57122020-04-13. Service bulletin. ENGINE. This Preliminary information communicates to the technician a service Diagnostic / Repair tip to avoid causing the crankshaft sprocket to disengage from the crankshaft during crankshaft balancer removal.
PIP5693A2020-04-13. Service bulletin. ENGINE. The Preliminary Information communication advises the technician that the Product Quality Center has a part restriction for the E99 Engine Control Module. The dealer technician is advised to call the GM Product Quality Center for further assistance.
040601029J2020-04-06. Service bulletin. ENGINE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This informational bulletin explains Unscheduled Supplemental Services (including Flushing Services and Additives) and the Proper use of GM Simplified Maintenance Schedules.
18NA0732020-03-30. Service bulletin. EQUIPMENT; ENGINE. This Bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
PIC64052020-03-09. Service bulletin. ENGINE; ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates that the OAT sensor may not read correctly upon startup after the vehicle has been parked for two hours or more. Engineering is aware of the concern and is working on a resolution.
15NA0102020-03-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This informational 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.
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.

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