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Diagnostic trouble code

P2635

11 owner reports and 474 manufacturer filings across 102 model years from Buick, Cadillac, Chevrolet, GMC and others.

PowertrainGeneric OBD-II code474 manufacturer filings11 owner reports

Where P2635 shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2016 GMC YukonFuel System, Gasoline29
2016 Cadillac EscaladeFuel System, Gasoline21
2016 Chevrolet SuburbanFuel System, Gasoline16
2017 GMC SierraFuel System, Gasoline15
2017 Chevrolet SilveradoFuel System, Gasoline131
2016 Chevrolet TahoeFuel System, Gasoline13
2016 GMC SierraFuel System, Gasoline13
2016 Chevrolet Silverado 2500HDFuel System, Gasoline11
2017 GMC YukonFuel System, Other101
2017 Chevrolet Silverado 3500HDFuel System, Gasoline8
2017 Chevrolet SuburbanFuel System, Gasoline8
2017 Chevrolet ColoradoFuel System, Gasoline7
2016 Chevrolet ColoradoFuel System, Gasoline7
2024 Chevrolet Silverado 2500HDEngine7
2017 Chevrolet TahoeFuel System, Other61
2017 GMC CanyonFuel System, Gasoline7
2016 GMC CanyonFuel System, Gasoline7
2024 GMC Sierra 2500HDEngine7
2016 GMC Sierra 2500HDFuel System, Gasoline7
2017 Cadillac EscaladeFuel System, Other6
2017 Chevrolet SparkFuel System, Other6
2016 Chevrolet SparkFuel System, Other6
2017 Cadillac XT5Fuel System, Other5
2017 Chevrolet CruzeFuel System, Gasoline5
2017 Chevrolet ExpressFuel System, Gasoline5
2016 Chevrolet ExpressFuel System, Gasoline5
2017 Chevrolet MalibuFuel System, Other5
2016 Chevrolet MalibuFuel System, Other5
2018 Chevrolet Silverado 2500HDFuel System, Gasoline5
2024 Chevrolet Silverado 3500HDEngine5
2016 Chevrolet Silverado 3500HDFuel System, Gasoline5
2019 Chevrolet TahoeFuel/Propulsion System5
2017 Chevrolet VoltFuel System, Other5
2016 Chevrolet VoltFuel System, Other5
2017 GMC AcadiaFuel System, Other5
2017 GMC SavanaFuel System, Gasoline5
2016 GMC SavanaFuel System, Gasoline5
2024 GMC Sierra 3500HDElectrical System5
2017 Buick CascadaFuel System, Other3
2016 Buick CascadaFuel System, Other3
2017 Buick EnclaveFuel System, Other3
2016 Buick EnclaveFuel System, Other3
2017 Buick EncoreFuel System, Other3
2016 Buick EncoreFuel System, Other3
2017 Buick EnvisionFuel System, Other3
2016 Buick EnvisionFuel System, Other3
2017 Buick LaCrosseFuel System, Other3
2016 Buick LaCrosseFuel System, Other3
2017 Buick RegalFuel System, Other3
2016 Buick RegalFuel System, Other3
2017 Buick VeranoFuel System, Other3
2016 Buick VeranoFuel System, Other3
2017 Cadillac ATSFuel System, Other3
2017 Cadillac CT6Fuel System, Other3
2016 Cadillac CT6Fuel System, Other3
2017 Cadillac CTSFuel System, Other3
2016 Cadillac ELRFuel System, Other3
2016 Cadillac SRXFuel System, Other3
2017 Cadillac XTSFuel System, Other3
2016 Cadillac XTSFuel System, Other3

Showing the 60 model years where P2635 appears most; it is on file for 102 in total.

A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.

What it gets filed under

Fuel System, Gasoline 193Fuel System, Other 105Equipment 76Engine 33Electrical System 24Engine And Engine Cooling 5
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What owners said

Source: NHTSA complaint database

Owners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.

The vehicle has previously experienced electrical and fuel-system related issues, including fault codes such as P2635, P0E32 and P0E37
2023 Chevrolet TraverseJan 2, 2026NHTSA owner report
03-04-24 Engine sputtering Scanned vehicle and codes P2635 fuel pump low fuel/performance was detected
2019 Chevrolet TahoeJul 12, 2024NHTSA owner report
Code: P2635 Fuel pump ‘A’ low flow/ performance It only happens when it’s warm outside
2017 Chevrolet SilveradoFeb 26, 2024NHTSA owner report

Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names P2635. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.

What P2635 means

Source: SAE J2012 / OBD-II

P2635 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.

A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.

Common questions about P2635

Source: NHTSA files and the OBD-II standard

Can I keep driving with P2635 stored?

Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.

Does a code mean the car is recalled?

No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.

Why do the counts here differ from other sites?

Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.

Will clearing the code fix it?

Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.