# Service campaign A252528630

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 campaign
- NHTSA id: 11026502
- Published by NHTSA: 2025\-12\-09
- Manufacturer's number: A252528630
- Manufacturer's date: 2025\-12\-09
- Campaign id or software version: A252528630
- NHTSA component: FUEL/PROPULSION SYSTEM

## NHTSA's summary

Service Update. On certain vehicles listed above, under certain driving conditions and due to differences in flow rate characteristics, the fuel injectors may not be able to properly optimize engine fueling. Dealers will replace the engine’s three fuel injectors.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026502-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026502-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Fuel system

## Vehicles listed

- 2026 BUICK ENVISTA
- 2026 CHEVROLET TRAX

## Other bulletins for the same vehicles and component

- [A252528630\-03](/bulletins/11028657.md), 2026-02-09, Service campaign: FUEL/PROPULSION SYSTEM. Service Update. On certain vehicles listed above, under certain driving conditions and due to differences in flow rate characteristics, the fuel injectors may not be able to properly optimize engine fueling. Dealers will reprogram the engine control module.
- [A252528630\-02](/bulletins/11027827.md), 2026-01-28, Service campaign: FUEL/PROPULSION SYSTEM. Service Update. On certain vehicles listed above, under certain driving conditions and due to differences in flow rate characteristics, the fuel injectors may not be able to properly optimize engine fueling. Dealers will reprogram the engine control module.
- [A252528630\-01](/bulletins/11027289.md), 2026-01-07, Service campaign: FUEL/PROPULSION SYSTEM. Service Update. On certain vehicles listed above, under certain driving conditions and due to differences in flow rate characteristics, the fuel injectors may not be able to properly optimize engine fueling. Dealers will replace the engine’s three fuel injectors.
- [25\-NA\-065](/bulletins/11017173.md), 2025-04-24, Service bulletin: STEERING; SERVICE BRAKES; FUEL/PROPULSION SYSTEM. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.

JSON: [/v1/bulletins/11026502](/v1/bulletins/11026502)

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