WenmarOpen by Wenmar Pro

Service bulletins for the 2019 Buick Regal

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.

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

About P0300 on the 2019 Buick Regal: what the code means, and the bulletins and recalls about the same components.

By type

By component

By trouble code

By topic

Only bulletins with trouble code: P0300 are shown. Show all

Bulletins, newest first
18-NA-1152024-08-14. Service bulletin. ENGINE. This service bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set.
PIP5628G2023-09-18. Service bulletin. ENGINE. 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
PIP5628F2023-05-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). 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
PIP5628E2023-03-13. Service bulletin. EQUIPMENT:ELECTRICAL:ACCESSORY GENERATOR:OUTLETS/RECEPTACLE. 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
18-NA-1152022-05-11. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set.
21-NA-0362022-03-30. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT. This service bulletin advises the technician of a diagnostic test for a possible issue with a damaged OCV solenoid that may cause an oil leak and misfire, illuminating the MIL and setting DTCs P0300, P0302 and/or P0305.
PIP5628E2022-01-24. Service bulletin. ENGINE AND ENGINE COOLING. 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
19NA2462020-01-27. Service bulletin. ENGINE. This technical bulletin provides a procedure to correct a condition of engine runs rough, misfire or MIL Illuminated with P0300 set.
19NA2462019-11-25. Service bulletin. ENGINE AND ENGINE COOLING. This technical bulletin provides a procedure to correct a condition of engine runs rough, misfire or MIL Illuminated with P0300 set.
PIP5661A2019-11-12. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates diagnostics and repairs in addition to what is already in Service Information. The concern this document is designed for is specific to some 2019 vehicles with 2.0 LTG engine exhibiting a misfire and MIL due to P0300.
PIP56612019-08-12. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates diagnostics and repairs in addition to what is already in Service Information. The concern this document is designed for is specific to some 2019 vehicles with 2.0 LTG engine exhibiting a misfire and MIL due to P0300.

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