{"vehicle":{"id":"2021_chevrolet_trailblazer","year":2021,"make":"Chevrolet","model":"Trailblazer"},"code":"P0234","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":6,"bulletins":[{"nhtsa_id":11013244,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-01-30","date":"2025-01-17","document_id":"21-NA-293","mfr_campaign":null,"component":"ENGINE; POWER TRAIN; ELECTRICAL SYSTEM","summary":"This technical bulletin provides repair information to correct a customer concern of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing - Malfunction Indicator Lamp (MIL) Illuminated, DTC P0299, P0234, P0236, P00C7 Set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11013244-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11013244-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11013244"},{"nhtsa_id":10240189,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-08-02","date":"2023-07-28","document_id":"21-NA-293","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM","summary":"This technical bulletin provides repair information to correct a customer concern of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing - Malfunction Indicator Lamp (MIL) Illuminated, DTC P0299, P0234, P0236, P00C7 Set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10240189-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10240189-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10240189"},{"nhtsa_id":10232834,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-03-13","date":"2023-02-23","document_id":"PIP5892B","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER","summary":"This Preliminary Information communication provides information to the dealer technician related to a Malfunction Indicator Lamp coming on post turbocharger replacement with P0234 (Engine Overboost) set current or in history. It advises the technician to clear the DTC, Use GDS2 to perform the Intake System Learned Values Reset. To advise the technician the GM is aware of this concern and will provide updates as they become available.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10232834-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10232834-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10232834"},{"nhtsa_id":10230687,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-30","date":"2022-12-07","document_id":"PIP5892A","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"This Preliminary Information communication provides information to the dealer technician related to a Malfunction Indicator Lamp coming on post turbocharger replacement with P0234 (Engine Overboost) set current or in history. It advises the technician to clear the DTC, Use GDS2 to perform the Intake System Learned Values Reset. To advise the customer that GM is aware of this concern and will provide updates as they become available.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10230687-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10230687-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10230687"},{"nhtsa_id":10230681,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-30","date":"2022-12-01","document_id":"PIP5892","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"This Preliminary Information communication provides information to the dealer technician related to a Malfunction Indicator Lamp coming on post turbocharger replacement with P0234 (Engine Overboost) set current or in history. It advises the technician to clear the DTC, Use GDS2 to perform the Intake System Learned Values Reset. To advise the customer that GM is aware of this concern and will provide updates as they become available.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10230681-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10230681-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10230681"},{"nhtsa_id":10214222,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-06-21","date":"2022-01-13","document_id":"21NA293","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"This technical bulletin provides repair information to correct a customer concern of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing - Malfunction Indicator Lamp (MIL) Illuminated, DTC P0299, P0234, P0236, P00C7 Set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10214222-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10214222-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10214222"}],"url":"https://open.wenmarpro.com/makes/chevrolet/trailblazer/2021/bulletins?code=P0234"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/chevrolet/trailblazer/2021/codes/P0234","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}