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Service bulletin GCUS-3-629

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10135431
Published by NHTSA2018-05-07
Manufacturer's numberGCUS-3-629
Manufacturer's date2016-07-28
NHTSA componentFUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

NHTSA's summary

40240 - Emission Recall. Vehicles may have out-of-specification crimps on the front under hood flexible fuel feed pipe. Fuel may weep from these connections and the fuel odor may enter the cabin. Dealers to to inspect the fuel feed pipe and manufacture date. If there is indication of weeping or the pipe manufacture date falls into the suspect date range, replace the fuel feed pipe.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Fuel system, Fuel pump

Vehicles listed
CHEVROLET VOLT2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
PIP55962018-11-13. Service bulletin. This Preliminary information communicates that when removing the fuel line jumper hose care should be taken to be sure the line is reinstalled correctly to avoid a no/low fuel pressure situation.
PIC6275A2017-11-14. Service bulletin. This Preliminary information communicates a posible loss of 12 volt power to the fuel pump drive module. This is to point the dealer at a possible lose terminal in the instrument panel fuse panel
PIP5507B2017-08-15. Service bulletin. This Preliminary information communicatesIn ambient temperatures 100F (37.7 C)degrees or higher, DTCs P2635 and/or P018B may set.The vehicle may also exhibit a hesitation or stalling condition.Excessively Hot and sustained ambient temperatures over 100F (37.7 C) degrees Mainly in TX, AZ, UT, NV, CA, NM (could be any state) causingVapor buildup in fuel feed line.Customers can be advised to utilize fuels with octane levels greater than 91, Refrain from extended idleing periods if possible, park vehicles in covered garage.Replacing the fuel pump will not repare this concern.
PIP5507A2017-08-15. Service bulletin. This Preliminary information communicatesIn ambient temperatures 100F (37.7 C)degrees or higher, DTCs P2635 and/or P018B may set.The vehicle may also exhibit a hesitation or stalling condition.Excessively Hot and sustained ambient temperatures over 100F (37.7 C) degrees Mainly in TX, AZ, UT, NV, CA, NM (could be any state) causingVapor buildup in fuel feed line.Customers can be advised to utilize fuels with octane levels greater than 91, Refrain from extended idleing periods if possible, park vehicles in covered garage.Replacing the fuel pump will not repare this concern.
16-NA-2252017-08-15. Service bulletin. This technical bulletin provides a procedure to replace the fuel pump module assembly if the DTC P2635 and/or P018B are set.