# Service bulletin PIP5647B

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: 10179642
- Published by NHTSA: 2020\-09\-14
- Manufacturer's number: PIP5647B
- Manufacturer's date: 2020\-08\-20
- NHTSA component: ELECTRICAL SYSTEM; ENGINE; FUEL SYSTEM, GASOLINE

## NHTSA's summary

This Preliminary information communicates A vehicle may have a concern of running poor and stalling. No trouble codes may be set referencing this condition. Fuel trims around \-20% may be observed on both banks. Engine oil level will be found over full and have a fuel odor. It will be found that the Engine oil is diluted with fuel. Small gas engines \(SGE\) May only have the engine oil level over full and have a fuel odor. It will be found that the Engine oil is diluted with fuel. This concern is caused by marshalling the vehicle around the lot before it is sold and/or short driver cycles.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179642-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179642-9999.pdf)

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

## Components

Electrical system, Engine, Fuel system

## Vehicles listed

- 2016 to 2020 BUICK ENCORE
- 2016 to 2019 CHEVROLET CRUZE
- 2018 to 2020 CHEVROLET EQUINOX
- 2016 to 2020 CHEVROLET MALIBU
- 2019 to 2020 CHEVROLET SILVERADO 1500
- 2021 CHEVROLET SUBURBAN
- 2021 CHEVROLET TAHOE
- 2019 to 2020 GMC SIERRA 1500
- 2018 to 2020 GMC TERRAIN
- 2021 GMC YUKON

## Recalls for the same vehicles and component

- [25V619000](/recalls/nhtsa/25V619000.md), 2025-09-18: FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY
- [2025225](/recalls/tc/2025225.md), 2025-04-24: Engine
- [25V274000](/recalls/nhtsa/25V274000.md), 2025-04-24: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
- [23V047000](/recalls/nhtsa/23V047000.md), 2023-02-02: FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY
- [2021583](/recalls/tc/2021583.md), 2021-09-23: Fuel System
- [21V739000](/recalls/nhtsa/21V739000.md), 2021-09-23: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP:CONTROL/DRIVE MODULE
- [21V421000](/recalls/nhtsa/21V421000.md), 2021-06-10: AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE
- [21V346000](/recalls/nhtsa/21V346000.md), 2021-05-13: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE
- [21V064000](/recalls/nhtsa/21V064000.md), 2021-02-11: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
- [2019631](/recalls/tc/2019631.md), 2019-12-12: Electrical

## Other bulletins for the same vehicles and component

- [N262576260](/bulletins/11038468.md), 2026-10-15, Service campaign: ENGINE. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition that could cause a small exhaust leak at the catalytic converter inlet. Dealers are to replace the catalytic converter inlet clamp and to inspect the catalytic converter – replacing it if damage is observed. The repairs will be made at no charge to the customer.
- [N262552620](/bulletins/11032588.md), 2026-05-11, Service campaign: ENGINE. Certain vehicles may have a condition that could cause the cylinder 2 glow plug to fail. If this failure occurs, the Malfunction Indicator Light \(Check Engine Light\) will illuminate and a diagnostic trouble code will set. 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 May 11, 2026, 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 May 11, 2026, 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 cylinder 2 glow plug as necessary. The repairs will be made at no charge to the customer.
- [N262548050](/bulletins/11031551.md), 2026-04-24, Service bulletin: ENGINE. This message is to inform dealers that Special Coverage N262548050 is being temporarily suspended for the models above. Involved vehicles will be temporarily removed from IVH. Dealers will be notified when repairs can be resumed. We apologize for any inconvenience this situation may cause.
- [N262548050](/bulletins/11031510.md), 2026-04-23, Service campaign: ENGINE. Certain vehicles, may have a condition that could cause the Catalytic Converter to fail. If this failure occurs, the Malfunction Indicator Light \(Check Engine Light\) will illuminate, and a diagnostic trouble code will set. Dealers are to replace the Catalytic Converter as necessary. The repairs will be made at no charge to the customer.
- [N252516900\-01](/bulletins/11028909.md), 2026-02-19, 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.
- [N252516900](/bulletins/11028382.md), 2026-02-05, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. Additional VINs moved to Open status.
- [N252516900](/bulletins/11027870.md), 2026-01-29, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. Additional VINs Moved to ‘Open’ Status
- [N252515590](/bulletins/11027795.md), 2026-01-27, Service campaign: ELECTRICAL SYSTEM. Certain vehicles listed above, may have a condition in which the body\-to\-chassis ground strap may be corroded. Dealers will replace the ground strap.
- [N252494003\-02](/bulletins/11027714.md), 2026-01-21, Service campaign: ENGINE. Certain vehicles listed above, may have a condition where the connecting rod and/or crankshaft engine components in these vehicles may have manufacturing defects that can lead to engine damage and engine failure. This special coverage covers if an engine failure occurs in the vehicle as a result of the condition described above for a period of 10 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 May 23, 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 May 23, 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 engine. The repairs will be made at no charge to the customer.
- [N252516900](/bulletins/11027666.md), 2026-01-15, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. Fuel Pump Power Control Module. Additional VINs Moved to ‘Open’ Status

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