P0308 on Chevrolet vehicles Cylinder 8 is misfiring

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

Bulletins and campaigns Chevrolet filed with NHTSA whose summary names P0308. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• PIP5628 Service bulletin
  2019-02-18 · 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
• PIP5628B Service bulletin
  2020-05-21 · 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
• PIP5628C Service bulletin
  2020-10-08 · 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
• PIP5628E Service bulletin
  2021-12-14 · 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
• PIP5628E Service bulletin
  2023-02-10 · 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
• 23-NA-043 Service bulletin
  2023-04-19 · Engine And Engine Cooling
• This service bulletin provides a procedure to replace the valve lifter and guides to correct customer concerns of Poor Engine Performance, Engine Misfires, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 Set.
• PIP5159B Service bulletin
  2016-09-23 · Engine
• THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT MAY HAVE A SERVICE ENGINE SOON MALFUNCTION INDICATOR LAMP ON AND DIAGNOSTIC TROUBLE CODE P0300 - P0308 MAY SET. TECHNICIAN WILL INSPECT FOR LOSE SPARKPLUG WIRE. IF A SPARK PLUG WIRE IS FOUND LOSE CHECK FOR A MISSING “C” CLIP ON THE WIRE END FOR THE IGNITION COIL. IF THE CLIP IS MISSING REPLACE TH
• PIP5159C Service bulletin
  2018-10-29 · Engine
• This Preliminary Information communication provides information to the technician about vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on and Diagnostic Trouble Code P0300 - P0308  may set. Technician will inspect for lose sparkplug wire. If a spark plug wire is found lose check for a missing ?C? clip on the wire end for the ignition coil. If the clip is missing replace th
• PIP5628F Service bulletin
  2023-04-24 · 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

A stored code names the test that failed, never the part that caused it. The record above is what Chevrolet and its owners have filed about it; the code’s page across every make has the whole file.