# Service bulletin 21\-NA\-186 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. - Type: Service bulletin - NHTSA id: 11013026 - Published by NHTSA: 2025\-01\-23 - Manufacturer's number: 21\-NA\-186 - Manufacturer's date: 2025\-01\-07 - NHTSA component: ENGINE; ELECTRICAL SYSTEM ## NHTSA's summary This service bulletin provides repair information to correct a customer concern of Service Engine Soon Illuminated in DIC and/or a Malfunctioning Fuel Gauge with DTC U0076/U18A2/P1001/P1434 or Other Message Counter Incorrect Codes Set. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11013026-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11013026-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system, Engine ## Trouble codes named P1001, P1434, U0076, U18A2 ## Vehicles listed - 2020 to 2025 CHEVROLET MALIBU ## Other bulletins for the same vehicles and component - [00\-06\-01\-026R](/bulletins/11026017.md), 2025-12-03, Service bulletin: ENGINE. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage. - [N252508360](/bulletins/11024775.md), 2025-11-03, Warranty extension: ENGINE. Special Coverage. Certain vehicles listed above may have a condition that could cause the turbocharger to fail. If this condition occurs, the Malfunction Indicator Lamp \(Check Engine Light\) will illuminate, and a diagnostic trouble code will set. Additionally, a message may be displayed indicating the vehicle’s available engine power is reduced. This special coverage covers the condition described above for a period of 15 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after November 3, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to November 3, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to replace the turbocharger as necessary. The repairs will be made at no charge to the customer. - [23\-NA\-153](/bulletins/11024485.md), 2025-10-25, Service bulletin: ENGINE. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay. - [23\-NA\-119](/bulletins/11024331.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin provides service procedure information to correct a customer concern of Shift to Park Displayed on DIC When Vehicle is in\- Park, No Start \- DTC B000A Set. - [15\-NA\-010](/bulletins/11020254.md), 2025-07-07, Service bulletin: ENGINE. This service 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. - [22\-NA\-242](/bulletins/11019545.md), 2025-06-16, Service bulletin: ELECTRICAL SYSTEM. This warranty administration bulletin provides information for dealers/technicians on System Reset and Connector Reconnect Labor Code Numbers. - [25\-NA\-100](/bulletins/11019503.md), 2025-06-12, Service bulletin: ENGINE. This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California Emission State may be entitled to the 7 year, 70,000\-mile Emission Select State Component Limited Warranty. - [24\-NA\-139](/bulletins/11019378.md), 2025-06-07, Service bulletin: FUEL/PROPULSION SYSTEM; ENGINE. This service bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Malfunction Indicator Lamp \(MIL\) Illuminated – DTC P023F or P129F Set. - [18\-NA\-069](/bulletins/11017876.md), 2025-05-06, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM; ENGINE. This service bulletin provides a service procedure to correct conditions of Poor Engine Performance in Extremely cold weather conditions, CAC Icing, MIL Illuminated with DTCs set. - [25\-NA\-087](/bulletins/11017595.md), 2025-05-02, Service bulletin: ELECTRICAL SYSTEM. This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs. JSON: [/v1/bulletins/11013026](/v1/bulletins/11013026) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2021-NA-186&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11013026&vehicle=Service%20bulletin%2021-NA-186)