# Service bulletin PIT6177

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: 11006322
- Published by NHTSA: 2024\-08\-13
- Manufacturer's number: PIT6177
- Manufacturer's date: 2024\-08\-13
- NHTSA component: FUEL/PROPULSION SYSTEM

## NHTSA's summary

This Preliminary information communicates an issues of the left rear leaf spring making a squeaking noise due to diesel fuel contamination that may occur during refueling after the fuel nozzle is removed from the fuel filler pipe. Dealers are to create a foam seal around the fuel filler pipe to prevent fuel from leaking onto the left spring.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11006322-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11006322-9999.pdf)

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

## Components

Fuel system

## Vehicles listed

- 2020 to 2024 CHEVROLET SILVERADO 1500
- 2020 to 2024 GMC SIERRA 1500

## Recalls for the same vehicles and component

- [19V837000](/recalls/nhtsa/19V837000.md), 2019-11-21: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

## Other bulletins for the same vehicles and component

- [N262558690\-02](/bulletins/11037460.md), 2026-09-23, Service campaign: FUEL/PROPULSION SYSTEM. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module.
- [N262558690](/bulletins/11037321.md), 2026-09-16, Service campaign: FUEL/PROPULSION SYSTEM. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module.
- [N242452131\-02](/bulletins/11037312.md), 2026-09-15, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain 2023\-2024 model year Chevrolet Colorado / Silverado 1500 and GMC Canyon / Sierra 1500 vehicles equipped with a 2.7L engine \(RPO L3B\). The Engine Control Module \(ECM\) may not sufficiently control fuel injector flow rate under certain driving conditions. Dealers are to reprogram the ECM.
- [N262558690\-01](/bulletins/11036648.md), 2026-09-02, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles listed above may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module.
- [N262558690\-01](/bulletins/11036143.md), 2026-08-12, Service campaign: FUEL/PROPULSION SYSTEM. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module.
- [N242452130\-01](/bulletins/11035685.md), 2026-08-04, Service campaign: FUEL/PROPULSION SYSTEM. Certain vehicles may have a condition in which the Engine Control Module \(ECM\) does not sufficiently control fuel injector flow rate under certain driving conditions. Dealers are to reprogram the ECM.
- [N242438500\-04](/bulletins/11025665.md), 2025-11-24, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain 2024 Model Year Chevrolet Silverado and GMC Sierra vehicles with a 6.6L diesel engine. The Engine Control Module \(ECM\) may not properly diagnose, may not set Diagnostic Trouble Codes \(DTCs\), or may not illuminate the Malfunction Indicator Light \(Check Engine Light\) if certain fault conditions of the Selective Catalyst Reduction \(SCR or NOx\) catalyst occur. Dealers are to reprogram the ECM and TCM.
- [25\-NA\-044](/bulletins/11024498.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This service bulletin provides information for dealers/technicians on SPS2 Hybrid/EV Battery Data Retrieval for Service High Voltage DTCs.
- [24\-NA\-202](/bulletins/11024496.md), 2025-10-27, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This service bulletin provides dealers with Warranty Administration information on North American Charging Standard \(NACS\) DC Adapter Warranty Claim Information.
- [23\-NA\-202](/bulletins/11024487.md), 2025-10-25, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This service bulletin provides information on High Voltage Drive Motor Battery \- TAC Approval and Exchange Program for BrightDrop, Chevrolet Silverado EV, and GMC Sierra EV, HUMMER EV/SUV.

JSON: [/v1/bulletins/11006322](/v1/bulletins/11006322)

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