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Service bulletin 17-NA-335

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 id10190331
Published by NHTSA2021-04-15
Manufacturer's number17-NA-335
Manufacturer's date2021-04-15
NHTSA componentENGINE; FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

NHTSA's summary

Malfunction Indicator Lamp Illuminated (MIL) - DTC P2635 and/or P018B Set In High Ambient Temperatures With Hesitation, Surging and Stalling Condition Some customers may comment that the Malfunction Indicator Light (MIL) is illuminated. Some customers may also comment on one or more of the following symptoms: • Hesitation • Surging • Stalling Note: In ambient temperatures 100 F (37.7 C) degrees or higher, DTCs P2635 and/or P018B may set. The Technician may find one or more of the following DTCs set: • P2635 • P018B Cause This condition may be caused by a vapor buildup in fuel feed line. Correction If the conditions stated above are met, replace the fuel pump module with an updated version

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

Engine, Fuel system, Fuel hoses and lines

Trouble codes named

P018B, P2635

Vehicles listed
CADILLAC ESCALADE2015, 2016
CADILLAC ESCALADE ESV2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 15002014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2015, 2016
GMC SIERRA 15002014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 35002014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON2015, 2016
GMC YUKON DENALI2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON DENALI XL2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON XL2015, 2016

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
PIP5395E2018-11-26. Service bulletin. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicles that may have rattle or ticking noise that is louder inside the vehicle than outside. The noise may also sound like a lifter tick. If the noise is heard best at the fuel line and the sound will be real loud with a stethoscope. The fuel line will need to be replaced.
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.
PIP3343F2018-02-21. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have an oil leak shortly after a cold start when extremely low ambient temperatures are present. Technician will need to clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430.
PIP52052017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that may have a rattle, tick and/or a vibration from the rear of the vehicle. Technician will need to replace the fuel line with part number 12618338.
PIP3343E2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have an oil leak shortly after a cold start when extremely low ambient temperatures are present. Technician will need to clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430.
PIP5205A2016-10-20. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS TO DIAGNOSING THE CONCERN OF A RATTLE, TICK AND/OR A VIBRATION FROM THE REAR OF THE VEHICLE. THIS COULD BE COMING FROM THE FUEL FEED LINE BETWEEN THE FUEL TANK AND ETHANOL SENSOR. TECHNICIAN WILL APPLY PRESSURE TO THE FUEL LINE TO DETERMINE IF THIS IS THE SOURCE OF THE CONCERN. IF IT IS DETERMINED THE FUEL LINE IS THE SOURCE OF THIS CONCERN REPLACE THE FUEL FEED PIPE BETWEEN THE CHASSIS LINE AND THE HIGH PRESSURE PUMP.
PIP5395A2016-09-27. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON HOW TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE RATTLE OR TICKING NOISE THAT IS LOUDER INSIDE THE VEHICLE THAN OUTSIDE. THE NOISE MAY ALSO SOUND LIKE A LIFTER TICK. IF THE NOISE IS HEARD BEST AT THE FUEL LINE AND THE SOUND WILL BE REAL LOUD WITH A STETHOSCOPE. THE FUEL LINE WILL NEED TO BE REPLACED.
PIP-52052014-11-08. Service bulletin. GMC/CHEVROLET/CADILLAC: BETWEEN FUEL TANK AD ETHANOL SENSOR, A NOISE OF RATTLE, TICK AND/OR VIBRATION, IS COMING FROM FUEL FEED LINE IN REAR OF VEHICLE AND PRESSURE SHOULD BE APPLIED TO FUEL LINE AND REPLACE IF SOURCE IS PRESENT. MODEL 2015, ESCALADE, SUBURBAN, TAHOE, YUKON, YUKON XL. *PE
PIP-4942-B2014-10-16. Service bulletin. GMC/CHEVROLET: AT BOTTOM OF FLYWHEEL HOUSING, A LEAK IS FOUND, CAUSING A FUEL ODOR, DUE TO HIGH PRESSURE PUMP TO HIGH PRESSURE LINE FITTING OR FUEL RAIL CONNECTION. 2010-2015 EXPRESS, SIERRA, SAVANA, SILVERADO. *PE