# Service bulletin 19NA237

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: 10168197
- Published by NHTSA: 2019\-11\-25
- Manufacturer's number: 19NA237
- Manufacturer's date: 2019\-10\-17
- NHTSA component: FUEL SYSTEM, DIESEL

## NHTSA's summary

This informational bulletin explains how to identify possible DEF contamination.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10168197-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10168197-9999.pdf)

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

## Components

Fuel system

## Vehicles listed

- 2019 CHEVROLET 6500
- 2016 to 2020 CHEVROLET COLORADO
- 2014 to 2019 CHEVROLET CRUZE
- 2018 to 2019 CHEVROLET EQUINOX
- 2010 to 2018 CHEVROLET EXPRESS
- 2020 CHEVROLET EXPRESS
- 2010 to 2020 CHEVROLET SILVERADO 1500
- 2010 to 2020 CHEVROLET SILVERADO 2500
- 2010 to 2020 CHEVROLET SILVERADO 3500
- 2019 to 2020 CHEVROLET SILVERADO 4500
- 2020 CHEVROLET SILVERADO 5500
- 2019 CHEVROLET SILVERADO 6500
- 2019 CHEVROLET duplicate SILVERADO 5500
- 2016 to 2020 GMC CANYON
- 2010 to 2018 GMC SAVANA
- 2020 GMC SAVANA
- 2010 to 2018 GMC SIERRA 1500
- 2020 GMC SIERRA 1500
- 2010 to 2020 GMC SIERRA 2500
- 2010 to 2018 GMC SIERRA 3500
- 2010 to 2013 GMC SIERRA DENALI
- 2015 to 2016 GMC SIERRA DENALI
- 2018 to 2019 GMC SIERRA DENALI
- 2018 to 2020 GMC TERRAIN

## Recalls for the same vehicles and component

- [2023040](/recalls/tc/2023040.md), 2023-02-02: Fuel System
- [23V047000](/recalls/nhtsa/23V047000.md), 2023-02-02: FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY
- [19V837000](/recalls/nhtsa/19V837000.md), 2019-11-21: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
- [2019462](/recalls/tc/2019462.md), 2019-09-19: Fuel System
- [19V667000](/recalls/nhtsa/19V667000.md), 2019-09-19: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
- [2019055](/recalls/tc/2019055.md), 2019-02-08: Fuel System
- [19V088000](/recalls/nhtsa/19V088000.md), 2019-02-07: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
- [2018289](/recalls/tc/2018289.md), 2018-06-01: Fuel System
- [18V358000](/recalls/nhtsa/18V358000.md), 2018-05-31: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
- [2018251](/recalls/tc/2018251.md), 2018-05-11: Fuel System

## Other bulletins for the same vehicles and component

- [18\-NA\-180](/bulletins/11024324.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.
- [18\-NA\-180](/bulletins/11023365.md), 2025-09-26, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.
- [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.
- [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.
- [PIE0812](/bulletins/11014161.md), 2025-02-11, Service bulletin: FUEL/PROPULSION SYSTEM; ENGINE. This engineering information \(EI\) is requesting information from technicians to perform the check list provided and contact the engineer listed in regard to the vehicle having loss of power and/or having the MIL illuminated on the Driver Information Center \(DIC\).
- [18\-NA\-180](/bulletins/11013239.md), 2025-01-30, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.
- [18\-NA\-180](/bulletins/11012678.md), 2025-01-08, Service bulletin: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.
- [18\-NA\-180](/bulletins/11011896.md), 2024-12-17, Service bulletin: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.
- [PIT6259](/bulletins/11011443.md), 2024-12-05, Service bulletin: FUEL/PROPULSION SYSTEM. This Preliminary information communicates information on faulty replacement K111 Fuel Pump Driver Control Module.
- [24\-NA\-225](/bulletins/11010874.md), 2024-12-02, Service bulletin: FUEL/PROPULSION SYSTEM. This bulletin provides information on how to look for and test for DEF or water in the fuel system and what the specs should be.

JSON: [/v1/bulletins/10168197](/v1/bulletins/10168197)

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