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Service bulletins for the 2015 Chevrolet Express

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.

1563 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
PIP4912C2017-08-15. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician on vehicles that may have an intermittent high idle. If a technician has duplicated, or the customer description aligns with the speeds mentioned in the idle speed description tables, the idle speed should be considered a normal characteristic of current vehicle design.
PIP5152A2017-08-15. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician on the proper steps for filling the coolant system for vehicles with a diesel engine and rear heater systems. Dealer will need to review and use Service Information procedures for Cooling System Draining and Filling (Vac-N-Fill Diesel) after all cooling system repairs are made. When filling the cooling systems on vehicles that have been up-fitted with rear heaters, such as ambulances or buses, ensure that the rear heater is purged of all air.
PIP5007D2017-08-15. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This Preliminary Information communication advises the technician that vehicles with engine Regular Production Option Code LGH or LML may have an Exhaust Fluid Quality Poor message displayed on the Driver Information Center. Technician will need to complete the current Service Information diagnostic for any current Diagnostic Trouble Codes or symptoms found. If an Exhaust Fluid Quality Poor message is displayed with a specific Diagnostic Trouble Code, use that specific Service Information diagnostic, and repair the vehicle as necessary. If the dealer has found an Exhaust Fluid Quality Poor message with no Diagnostic Trouble Code, diagnose the condition using the current Service Information diagnosis for Diagnostic Trouble Code P20EE / P207F (P2BAD for 2012 and newer model years). After making repairs use the Service Information Document titled "Reductant Fluid Quality Test (With or without Diagnostic Trouble Codess)" to evaluate and clear the Exhaust Fluid Quality Poor Driver Information Center message.
PIP5163A2017-08-15. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.
PIP3119M2017-08-15. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician may find Diagnostic Trouble Codes P0420 and or P0430 stored. Technician should be advised that the catalytic converter efficiency Diagnostic Trouble Codes P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter. Technician will need to use a Tech2 to check the verify engine run time on the Engine Hour Meter in the Instrument Panel Cluster Data Display/Data 1 List in the scan tool match. If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle. If the catalytic converter was replaced and the Diagnostic Trouble Codes set it may be a result of the engine run time restrictions no longer being in place since the vehicle is no longer new. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle.
PIP3343D2017-08-15. Service bulletin. ENGINE. 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.
PIP5088B2017-08-15. Service bulletin. ENGINE. This Preliminary Information communication advises the technician that the 2010 through 2015 6.6L Duramax Diesel Engine Part number 12638502 has been placed on a parts restriction through General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
PIP5133B2017-08-15. Service bulletin. ENGINE. This Preliminary Information communication advises the technician that the 2010 through 2015 6.6L Duramax Diesel Engine Fuel Injection Pump Part numbers 12645102, 12658095 and 12661059 will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
16-NA-2442017-08-15. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This informational bulletin provides information on Diesel Exhaust Fluid (DEF) and the proper use of the DEF system.
10-06-05-002D2017-08-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This informational bulletin provides information on Clean Exhaust Filter See Owners Manual Now or Cleaning Exhaust Filter Keep Driving Until Message is Cleared Message Displayed on DIC, DTC P2463 May Be Set.
PIP4138P2017-08-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308. If published Service Information diagnostics does not isolate the cause of this concern technician should check for a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, and a collapsed active fuel management lifter.
PIP4828C2017-08-15. Service bulletin. POWER TRAIN; ENGINE. This Preliminary Information communication provides information to the technician about vehicles that have a rough idle and/or momentary lack of power after cold starting the engine and immediately placing the transmission in gear. Technician should follow published Service Information diagnostics first. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.
294002017-08-07. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Some of the 2015 Chevrolet Express vehicles equipped with a diesel engine may have a condition where a malfunction-indicator light (MIL) may illuminate due to an offset in the temperature sensor in the diesel-emission-reduction fluid (DEF) tank reservoir or increased DEB tank-heater resistance.
10-00-89-005F2017-07-18. Service bulletin. EQUIPMENT; ENGINE. This informational bulletin provides warranty policy information on revised wiring repair labor operations and required additional information.
10-00-89-005F2017-07-18. Service bulletin. EQUIPMENT; ENGINE. This informational bulletin provides warranty policy information on revised wiring repair labor operations and required additional information.
16-NA-2222017-05-25. Service bulletin. ENGINE. THIS INFORMATIONAL BULLETIN PROVIDES THE TECHNICIAN WITH WHAT MAY HAPPEN TO AN ENGINE DUE TO LACK OF MAINTENANCE.
PIT5206E2017-05-22. Service bulletin. SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES; PARKING BRAKE; ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN WITH THE STEPS ON DIAGNOSING AND REPAIRING VEHICLES THAT MAY HAVE UNWANTED GRADE BRAKING, REDUCED ENGINE POWER WITH NO DRIVER INFORMATION CENTER MESSAGES “ BRAKE PEDAL OVERRIDE FEATURE “, TRANSMISSION BUSY OR FREQUENT SHIFTING UP OR DOWN, AND DIAGNOSTIC TROUBLE CODES P057B, P057C, AND/OR P057D MAY OR MAY NOT BE SET. TECHNICIAN WILL USE THIS PRELIMINARY INFORMATION TO FIND THE BRAKE PEDAL POSITION DATA PARAMETERS IN THE SCAN TOOL, AND ALSO TO PROVIDE SOME ADDITIONAL DIAGNOSTIC HELP. THESE ISSUES MAY BE CAUSED BY AN INCORRECT BRAKE PEDAL POSITION SENSOR INPUT TO THE ENGINE CONTROL MODULE. TECHNICIAN WILL VERIFY WITH THE SCAN TOOL IF THE ENGINE CONTROL MODULE HAS THE CORRECT PARAMETERS FOR THE BRAKE PEDAL POSITION SENSOR. IF AN ENGINE CONTROL MODULE BRAKE PEDAL POSITION SENSOR RELEARN IS PERFORMED, THE TRUCK MAY BE TEMPORARILY REPAIRED UNTIL THE INTERMITTENT WIRING ISSUE BETWEEN THE ENGINE CONTROL MODULE AND BRAKE PEDAL POSITION SENSOR OCCURS AGAIN. ON 2014 AND NEWER TRUCKS INSPECT AND REPAIR ANY DAMAGE TO X115 AND X119. ON THE 2014 AND PREVIOUS TRUCKS INSPECT AND REPAIR ANY DAMAGE TO X205.
PIP5282A2017-05-18. Service bulletin. ENGINE. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN ABOUT THE CALCULATION AND OPERATION OF THE ENGINE OIL LIFE MONITOR. THE MONITOR CALCULATES THE PERCENT OF OIL LIFE REMAINING, BASED ON 3 PATHWAYS. THE FIRST PATHWAY FOR OIL LIFE CALCULATION IS ENGINE REVOLUTIONS. THE SECOND PATHWAY FOR OIL LIFE CALCULATION IS THE MILEAGE FORM THE LAST REST FOR ALL GENERAL MOTORS POWERTRAINS EXCEPT THE VOLT. THE THIRD PATHWAY FOR OIL LIFE CALCULATION IS THE AMOUNT OF TIME THE OIL IS IN THE ENGINE. THE VOLT USES A 2 YEAR TIMER INSTEAD OF 1 YEAR. IT ALSO USES THE ENGINE REVOLUTION COUNTER. IT DOES NOT USE THE MILEAGE PATHWAY TO COUNT DOWN.
PIP5088D2017-05-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT THE 6.6L DURAMAX, REGULAR PRODUCTION OPTION CODE LML/LGH, ENGINE PART NUMBER 12638505 PARTS RESTRICTION HAS ENDED. DEALER CAN ORDER PARTS THROUGH THE REGULAR CUSTOMER CARE AND AFTERSALES PARTS PROCESS.
PIP53702017-03-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN THAT SOME VEHICLE MAY HAVE AN “EXHAUST FLUID QUALITY POOR” ON THE DRIVER INFORMATION CENTER OR A DIESEL EXHAUST FLUID WARNING LAMP ON OR OTHER EXHAUST FLUID QUALITY RELATED CONCERNS. TECHNICIAN WILL INSPECT THE DIESEL EXHAUST FLUID FOR CONTAMINATION. TECHNICIAN SHOULD USE SERVICE INFORMATION FOR CONTAMINANTS IN DIESEL EXHAUST FLUID DIAGNOSIS AND USE SPECIAL TOOL J26568 OR EN50422 DIESEL EXHAUST FLUID REFRACTOMETER FOR FLUID TESTING.
151692017-02-01. Service bulletin. ENGINE. 15169 - CUSTOMER SATISFACTION PROGRAM. CERTAIN VEHICLES MAY EXHIBIT A CONDITION IN WHICH THE VEHICLE ENGINE WILL CRANK BUT NOT START. A REVERSED WIRE IN THE ENGINE EGI HARNESS CAN LEAD TO AN IGNITION SNEAK CIRCUIT, WHICH CAN PREVENT THE ENGINE CONTROL MODULE FROM COMMANDING A SPARK AT START-UP. DURING THE CRANK / NO START EVENT, A MALFUNCTION INDICATOR LAMP WILL BE ILLUMINATED, AND THE VEHICLE WILL STORE THE FOLLOWING CODE: U0100, U1000, AND B2193. DEALERS ARE TO REVISE THE ENGINE EGI HARNESS.
15169A MESSAGE2017-02-01. Service bulletin. ENGINE. 15169A - CUSTOMER SATISFACTION PROGRAM (REVISED TO UPDATE THE CRIMPING TOOL NUMBER IN THE SERVICE PROCEDURE). CERTAIN 2015 MODEL YEAR CHEVROLET CITY EXPRESS MODEL VEHICLES MAY EXHIBIT A CONDITION IN WHICH THE VEHICLE ENGINE WILL CRANK BUT NOT START. A REVERSED WIRE IN THE ENGINE EGI HARNESS CAN LEAD TO AN IGNITION SNEAK CIRCUIT, WHICH CAN PREVENT THE ENGINE CONTROL MODULE FROM COMMANDING A SPARK AT START-UP. DURING THE CRANK / NO START EVENT, A MALFUNCTION INDICATOR LAMP WILL BE ILLUMINATED, AND THE VEHICLE WILL STORE THE FOLLOWING CODE: U0100, U1000, AND B2193. DEALERS ARE TO REVISE THE ENGINE EGI HARNESS.
16-NA-2122017-01-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE); EQUIPMENT. THIS INFORMATION BULLETIN PROVIDE INFORMATION ON A NEW WAY TO LOOK AT NOX SENSOR READINGS AND EXHAUST TEMPERATURE DURING A DPF REGENERATION OR A REDUCTANT FLUID QUALITY TEST.
PIP5189B2016-11-01. Service bulletin. ELECTRICAL SYSTEM; ENGINE. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN ON THE STEPS TO DIAGNOSE AND REPAIR THE CONCERN OF BLACK SMOKE WHEN STARTING THE VEHICLE AFTER SITTING.
PIP4786C2016-10-20. Service bulletin. ENGINE AND ENGINE COOLING. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT MAY HAVE LOW OIL PRESSURE MESSAGE. TECHNICIAN MAY ALSO FIND A DIAGNOSTIC TROUBLE CODE P0521 IN THE ENGINE CONTROL MODULE. TECHNICIAN SHOULD FOLLOW ALL PUBLISHED SERVICE INFORMATION DIAGNOSIS. WHEN USING A SCAN TOOL IF THE OIL PRESSURE IS LOW BUT THE OIL PRESSURE AT THE OIL FILTER HOUSING IS CORRECT, TECHNICIAN SHOULD INSPECT THE VALVE LIFTER OIL FILTER FOR DEBRIS/SLUDGE THAT COULD BE RESTRICTING OIL FLOW TO THE OIL PRESSURE SENSOR. TECHNICIAN SHOULD REMOVE THE VALVE LIFTER OIL FILTER AND CLEAN IT. IF THE VALVE LIFTER OIL FILTER CANNOT BE CLEANED REPLACE IT.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.