Service bulletins for the 2012 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.
1796 on file from NHTSA, as of 2026-10-19.
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| G-197828 | 2017-03-03. Service bulletin. EQUIPMENT. 14151 - CUSTOMER SATISFACTION (MESSAGE ONLY, VIN LIST WAS NOT ATTACHED TO THE PREVIOUS MESSAGE). THIS MESSAGE IS TO ALERT DEALERS THAT GENERAL MOTORS HAS BECOME AWARE THAT SOME CUSTOMERS MAY BE OVERFILLING THEIR COMPRESSED NATURAL GAS (CNG) TANKS IN COLD WEATHER BY ADDING CNG BEYOND THE RECOMMENDED FILL PRESSURE. IF CNG TANKS ARE FILLED TO A HIGHER PRESSURE THAN RECOMMENDED AT A GIVEN AMBIENT TEMPERATURE, THEN MOVED TO A MUCH HIGHER AMBIENT TEMPERATURE ENVIRONMENT, EXPANSION OF THE GAS CAUSED BY THE TEMPERATURE CHANGE MAY CAUSE PRESSURE RELIEF DEVICES ON THE VEHICLE CNG TANK(S) TO RELEASE GAS, AS DESIGNED. IF AN IGNITION SOURCE WERE PRESENT, THIS COULD CREATE A RISK OF FIRE OR EXPLOSION. AN ADVISORY LETTER WAS MAILED TO ALL INVOLVED CUSTOMERS ALONG WITH AND OWNER MANUAL CNG SUPPLEMENT AND TWO LABELS WITH INSTRUCTIONS. |
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| G-197735 | 2017-03-03. Service bulletin. EQUIPMENT. 14151 - CUSTOMER SATISFACTION (MESSAGE ONLY WITH LETTER). THIS MESSAGE IS TO ALERT DEALERS THAT GENERAL MOTORS HAS BECOME AWARE THAT SOME CUSTOMERS MAY BE OVERFILLING THEIR COMPRESSED NATURAL GAS (CNG) TANKS IN COLD WEATHER BY ADDING CNG BEYOND THE RECOMMENDED FILL PRESSURE. IF CNG TANKS ARE FILLED TO A HIGHER PRESSURE THAN RECOMMENDED AT A GIVEN AMBIENT TEMPERATURE, THEN MOVED TO A MUCH HIGHER AMBIENT TEMPERATURE ENVIRONMENT, EXPANSION OF THE GAS CAUSED BY THE TEMPERATURE CHANGE MAY CAUSE PRESSURE RELIEF DEVICES ON THE VEHICLE CNG TANK(S) TO RELEASE GAS, AS DESIGNED. IF AN IGNITION SOURCE WERE PRESENT, THIS COULD CREATE A RISK OF FIRE OR EXPLOSION. AN ADVISORY LETTER WAS MAILED TO ALL INVOLVED CUSTOMERS ALONG WITH AND OWNER MANUAL CNG SUPPLEMENT AND TWO LABELS WITH INSTRUCTIONS. |
| G-191830 | 2017-02-24. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ENGINE. 14096A - EMISSIONS RECALL (REVISED SERVICE PROCEDURE). GENERAL MOTORS HAS DECIDED TO CONDUCT A VOLUNTARY EMISSION RECALL INVOLVING CERTAIN VEHICLES EQUIPPED WITH A GASOLINE ENGINE. THE OXYGEN (O2) SENSOR MAY FRACTURE IF CONDENSATION FROM THE CATALYTIC CONVERTER ENTERS THE O2 SENSOR AND CAUSES A SUDDEN TEMPERATURE CHANGE. IF THIS OCCURS, THE MALFUNCTION INDICATOR LAMP WILL ILLUMINATE. DEALERS ARE TO INSPECT AND, IF NECESSARY, REPLACE BANK 1, SENSOR 2 AND BANK 2, SENSOR 2 O2 SENSORS AND REPROGRAM THE ENGINE CONTROL MODULE. |
| G-191522 | 2017-02-24. Service bulletin. ENGINE. 14096 - EMISSIONS RECALL. GENERAL MOTORS HAS DECIDED TO CONDUCT A VOLUNTARY EMISSION RECALL INVOLVING CERTAIN VEHICLES EQUIPPED WITH A GASOLINE ENGINE. THE OXYGEN (O2) SENSOR MAY FRACTURE IF CONDENSATION FROM THE CATALYTIC CONVERTER ENTERS THE O2 SENSOR AND CAUSES A SUDDEN TEMPERATURE CHANGE. IF THIS OCCURS, THE MALFUNCTION INDICATOR LAMP WILL ILLUMINATE. DEALERS ARE TO INSPECT AND, IF NECESSARY, REPLACE BOTH BANK 2 O2 SENSORS AND REPROGRAM THE ENGINE CONTROL MODULE. |
| G-196792 | 2017-02-23. Service bulletin. ENGINE. 14096B - EMISSIONS RECALL (REVISED SERVICE PROCEDURE AND TECHLINE INFORMATION). GENERAL MOTORS HAS DECIDED TO CONDUCT A VOLUNTARY EMISSION RECALL INVOLVING CERTAIN VEHICLES EQUIPPED WITH A GASOLINE OR LIQUEFIED PETROLEUM GAS (LPG) ENGINE. THE OXYGEN (O2) SENSOR MAY FRACTURE IF CONDENSATION FROM THE CATALYTIC CONVERTER ENTERS THE O2 SENSOR AND CAUSES A SUDDEN TEMPERATURE CHANGE. IF THIS OCCURS, THE MALFUNCTION INDICATOR LAMP WILL ILLUMINATE. DEALERS ARE TO INSPECT AND, IF NECESSARY, REPLACE BANK 1, SENSOR 2 AND BANK 2, SENSOR 2 O2 SENSORS AND REPROGRAM THE ENGINE CONTROL MODULE. |
| 14151 | 2017-02-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 14151 - CUSTOMER SATISFACTION PROGRAM (REVISED POPULATION, LETTER ONLY). INFORMATION ABOUT CUSTOMERS OVERFILLING THEIR COMPRESSED NATURAL GAS (CNG) TANKS IN COLD WEATHER IN CERTAIN VEHICLES WAS PREVIOUSLY SENT. ADDITIONAL 13 VEHICLES ARE ADDED FOR WHICH WE DO NOT HAVE CURRENT OWNER NAME AND ADDRESS. A LIST IS ATTACHED WITH INVOICING BUSINESS ASSOCIATE CODE, PLEASE USE THE LIST TO ASSIST WITH IDENTIFYING THE OWNER AND LOCATION OF THE VEHICLE. IF YOU ARE ABLE TO LOCATE OWNER INFORMATION FOR ONE OF THESE VEHICLES, FOLLOW THE ORDERING INSTRUCTIONS PROVIDED IN THE ORIGINAL MESSAGE TO OBTAIN A FUEL FILLER DOOR LABEL, A GLOVE BOX HANG TAG AND AN OWNER MANUAL INSERT. UPON RECEIPT, PLEASE FORWARD THE KIT TO THE CUSTOMER FOR SELF-INSTALLATION. |
| 14096C | 2017-02-03. Service bulletin. EQUIPMENT; ENGINE. 14096C - EMISSIONS RECALL (REVISED CALIBRATION IS NOW AVAILABLE). GENERAL MOTORS HAS DECIDED TO CONDUCT A VOLUNTARY EMISSION RECALL INVOLVING CERTAIN VEHICLES EQUIPPED WITH A GASOLINE OR LIQUEFIED PETROLEUM GAS (LPG) ENGINE. THE OXYGEN (O2) SENSOR MAY FRACTURE IF CONDENSATION FROM THE CATALYTIC CONVERTER ENTERS THE O2 SENSOR AND CAUSES A SUDDEN TEMPERATURE CHANGE. IF THIS OCCURS, THE MALFUNCTION INDICATOR LAMP WILL ILLUMINATE. DEALERS ARE TO INSPECT AND, IF NECESSARY, REPLACE BANK 1, SENSOR 2 AND BANK 2, SENSOR 2 O2 SENSORS AND REPROGRAM THE ENGINE CONTROL MODULE. |
| 14730 | 2017-02-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. 14730 - CUSTOMER SATISFACTION PROGRAM. CERTAIN VEHICLES, EQUIPPED WITH ENGINE RPO L96 (6.0L V-8) AND TRANSMISSION RPO MYD (6 SPEED AUTO), MAY HAVE A CONDITION IN WHICH HIGH DUTY CYCLE USE WHILE PULLING TRAILERS AND/OR VEHICLES (SUCH AS FLEET CUSTOMERS DRIVING CUT-AWAY MODELS WITH 16 FOOT BOXES) CAN EXCEED THE TARGET ENERGY INPUT TO THE CLUTCH. THIS MAY LEAD TO FASTER TORQUE CONVERTER CLUTCH FRICTION MATERIAL WEAR THAN EXPECTED. SOME OPERATORS OF VEHICLES WITH THIS CONDITION HAVE REPORTED A DRIVELINE VIBRATION OR SHUDDER FEELING. DEALERS ARE TO REPROGRAM THE TRANSMISSION CONTROL MODULE (TCM). |
| 14301 | 2017-02-01. Service bulletin. SERVICE BRAKES. 14301 - SPECIAL COVERAGE. ON SOME VEHICLES, EQUIPPED WITH A HINGED LEFT SIDE REAR DOOR (E26), INADEQUATE CLEARANCE MAY RESULT IN ABRASION TO ONE OR BOTH REAR BRAKE LINES. THIS COULD CAUSE BRAKE FLUID LOSS RESULTING IN DECREASED BRAKE LINE PRESSURE, INCREASED BRAKE PEDAL TRAVEL AND INCREASED STOPPING DISTANCE. ALERTS ANNOUNCING THIS POTENTIAL CONDITION ARE: A SUDDEN INCREASE IN BRAKE PEDAL TRAVEL; ILLUMINATION OF “BRAKES” LIGHT AND STABILITRAK SYMBOL; DISPLAY OF “SERVICE BRAKE,” “SERVICE STABILITRAK,” AND “SERVICE TRACTION CONTROL” MESSAGES IN THE DRIVER INFORMATION CENTER (DIC); AND/OR CHIMES WILL BE HEARD. DEALERS ARE TO REPLACE REAR BRAKE LINES WITH PRE-FORMED LINES BASED ON VEHICLE CONTENT. |
| 14634 | 2017-02-01. Service bulletin. ENGINE. 14634 -SPECIAL COVERAGE (MESSAGE ONLY - POPULATION CHANGE). PLEASE BE ADVISED 2010-2014 CHEVROLET EXPRESS AND GMC SAVANA VEHICLES EQUIPPED WITH A 6.6L DIESEL ENGINE (LMM/LGH), 5.3L FLEX-FUEL ENGINE (LMF), OR A 6.0L LIQUID PROPANE/COMPRESSED NATURAL GAS ENGINE (LC8) ARE NOT INCLUDED IN THIS PROGRAM BUT WERE INADVERTENTLY INCLUDED. |
| 12050C | 2017-01-31. Service bulletin. SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY. 12050C - CUSTOMER SATISFACTION PROGRAM (REVISED EXPIRATION DATE, EXTENDED TO 4/30/16). CERTAIN 2011-2012 MODEL YEAR CHEVROLET EXPRESS AND GMC SAVANA VEHICLES, AND CHEVROLET SILVERADO AND SUBURBAN, AND GMC SIERRA AND YUKON XL 2500 SERIES VEHICLES, ALL EQUIPPED WITH A 10.5" REAR AXLE, MAY HAVE A CONDITION IN WHICH THE REAR AXLE RIGHT-HAND SIDE BEARING ADJUSTER CLIP AND BOLT MAY COME LOOSE WITHIN THE REAR AXLE. IF THIS OCCURS, A GRINDING NOISE AND A VEHICLE VIBRATION WOULD BE NOTICEABLE WHEN THE VEHICLE IS IN MOTION. IF THE ADJUSTOR OR BOLT PUNCTURES THE DIFFERENTIAL COVER PAN, A FLUID LEAK COULD DEVELOP. IF ENOUGH FLUID WERE TO LEAK OUT, THE DRIVER MAY HEAR INCREASING NOISE, ADDITIONAL VEHICLE VIBRATION, AND SMELL BURNT AXLE LUBRICANT. IF THE DRIVER IGNORES THESE WARNINGS AND CONTINUES TO DRIVE THE VEHICLE, A SLOW LOSS OF VEHICLE MOTION COULD OCCUR. DEALERS ARE TO INSPECT AND, IF NECESSARY, REPAIR THE REAR AXLE. |
| 15111 | 2017-01-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 15111 - SPECIAL COVERAGE. ON SOME 2012 MODEL YEAR CHEVROLET SILVERADO, EXPRESS, COLORADO AND GMC SIERRA, SAVANA, AND CANYON VEHICLES EQUIPPED WITH A 4.3L, 2.9L, OR 3.7L ENGINE (RPO LU3, LLV, OR LLR) AND A 4L60E AUTOMATIC TRANSMISSION (RPO M30), THE MALFUNCTION INDICATOR LAMP (MIL) MAY BE ILLUMINATED AND THE TRANSMISSION MAY EXHIBIT A HARSH SHIFT FROM FIRST GEAR TO SECOND GEAR. THIS CONDITION MAY ALSO SET DIAGNOSTIC TROUBLE CODE (DTC) P0741 IN THE TRANSMISSION CONTROL MODULE (TCM). IF DTC P0741 IS FOUND, DEALERS ARE TO REPLACE THE AUTOMATIC TRANSMISSION WIRING HARNESS. |
| 14653 | 2017-01-31. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. 14653 - SPECIAL COVERAGE. SOME 2010-2014 MODEL YEAR CHEVROLET EXPRESS, 2011-2014 MODEL YEAR CHEVROLET SILVERADO HD, 2010-2014 MODEL YEAR GMC SAVANA AND 2011-2014 MODEL YEAR GMC SIERRA HD VEHICLES EQUIPPED WITH A 6.6L ENGINE (RPO LML OR LGH), MAY HAVE A CONDITION WHERE THE INDIRECT FUEL INJECTOR CAN BECOME STUCK IN THE CLOSED POSITION OR CAN HAVE LOW FLOW. THIS CONDITION COULD RESULT IN THE ILLUMINATION OF THE MALFUNCTION INDICATOR LIGHT (MIL). DEALERS ARE TO REPLACE THE INDIRECT FUEL INJECTOR AS NECESSARY WITH AN IMPROVED SERVICE PART. |
| 15114 | 2017-01-30. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES; ENGINE. 15114 - SPECIAL COVERAGE. ON SOME 2010-2012 MODEL YEAR CHEVROLET SILVERADO HD AND GMC SIERRA HD OR 2011-2012 CHEVROLET EXPRESS AND GMC SIERRA HD VEHICLES EQUIPPED WITH A 6.6L DURAMAX DIESEL ENGINE (RPO LML, LGH) THE MALFUNCTION INDICATOR LAMP (MIL) MAY ILLUMINATE DUE TO A CONDITION WITH THE GLOW PLUGS. WHEN DIAGNOSED, REPLACEMENT OF ONE OF THE ENGINES GLOW PLUGS MAY BE REQUIRED. NO DRIVABILITY ISSUES ARE GENERALLY ASSOCIATED WITH THIS ISSUE, BUT HARDER STARTING IN COLD AMBIENT TEMPERATURES MAY BE NOTED. DEALERS ARE TO REPLACE THE AFFECTED GLOW PLUG. |
| 14652 | 2017-01-30. Service bulletin. ENGINE. 14652 - SPECIAL COVERAGE. ON SOME 2010-2012 MODEL YEAR CHEVROLET EXPRESS AND GMC SAVANA VEHICLES AND 2011-2012 MODEL YEAR CHEVROLET SILVERADO HD AND GMC SIERRA HD VEHICLES THAT ARE EQUIPPED WITH A 6.6L DIESEL ENGINE (LML/LGH), A MALFUNCTION-INDICATOR LIGHT (MIL) MAY ILLUMINATE DUE TO AN OFFSET IN THE TEMPERATURE SENSOR IN THE DIESEL-EMISSION-REDUCTION FLUID (DEF) TANK RESERVOIR, INCREASED TANK-HEATER RESISTANCE, OR REDUCTANT-SYSTEM PERFORMANCE. DEALERS ARE TO REPLACE THE DEF TANK RESERVOIR AND/OR SUPPLY MODULE PUMP. |
| 15823 LETTER | 2017-01-23. Service bulletin. FUEL SYSTEM, GASOLINE:STORAGE:AUXILLARY TANK. 15823 - CUSTOMER ADVISORY LETTER. THIS COMMUNICATION WAS TO INFORM DEALERS THAT A CUSTOMER MAILING WAS TAKING PLACE. THE LETTER INFORMS THE CUSTOMERS TO INSPECT FOR LEAKS OR DAMAGE TO THE FUEL FILLER NECK LINE AND/OR THE CARGO TANK HIGH PRESSURE FLEX LINES. TO ADDRESS THIS POTENTIAL CONDITION, CUSTOMERS ARE INSTRUCTED TO HAVE A CERTIFIED CNG TECHNICIAN INSPECT THE FUEL FILLER NECK LINE AND THE CARGO TANK HIGH PRESSURE FLEX LINE IN ACCORDANCE WITH GM SERVICE INFORMATION PROCEDURES. IN ADDITION, TO BE SURE THE CUSTOMER’S VEHICLE DOES NOT HAVE THIS CONDITION, CUSTOMERS ARE ALSO INSTRUCTED TO CONTINUE INSPECTIONS ANNUALLY AS PART OF ROUTINE MAINTENANCE. GM HAS UPDATED THE MAINTENANCE SCHEDULE IN THE CNG VEHICLES OWNER’S MANUAL SUPPLEMENT TO INCLUDE AN ANNUAL INSPECTION OF ALL CNG FLEX LINES. |
| 10-08-110-001E | 2017-01-19. Service bulletin. EQUIPMENT. THIS INFORMATIONAL BULLETIN PROVIDES INFORMATION ON THE PROPER USE OF FLOOR MATS. |
| 15-08-44-001H | 2017-01-19. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. THIS INFORMATIONAL BULLETIN PROVODES INFORMATION ON THE GM OF CANADA ONSTAR CELLULAR COMMUNICATION UPGRADE. |
| 08-08-51-003G | 2017-01-19. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; STRUCTURE:BODY:BUMPERS. THIS INFORMATIONAL BULLETIN PROVIDES INFORMATION ON REMOVING THE PROTECTIVE FILM ON BUMPERS FOR SHIPPING PROTECTION. |
| 07-03-10-008E | 2017-01-19. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; TIRES. THIS INFORMATIONAL PROVIDES INFORMATION ON SLIGHT OR MILD TIRE FEATHERING AND RECOMMENDED PRACTICES. |
| 04-00-89-015M | 2017-01-19. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. THIS WARRANTY ADMINISTRATION BULLETIN PROVIDES POLICY INFORMATION ON USING GM SERVICE POLICIES AND PROCEDURE MANUAL THAT REPRESENT KEY GM REQUIREMENTS FOR SERVICE OPERATIONS. |
| 00-03-10-006M | 2017-01-18. Service bulletin. EQUIPMENT; TIRES. THIS INFORMATIONAL BULLETIN PROVIDES GUIDANCE TO GM DEALERS WHEN USING GM APPROVED TIRE FORCE VARIATION MEASUREMENT EQUIPMENT. |
| 16-NA-218 | 2017-01-18. Service bulletin. SERVICE BRAKES. THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPLACE THE POWER BRAKE BOOSTER AND FLUID COOLER INLET AND OUTLET HOSE TO CORRECT A CONDITION OF BRAKE HYDROBOOSTER LEAKING POWER STEERING FLUID. |
| 080604006K | 2016-11-29. Service bulletin. ENGINE. THIS INFORMATIONAL BULLETIN PROVIDES INFORMATION FOR IDENTIFYING NON-GM ECM CALIBRATION USE AND POWER-UP HARDWARE DETECTION IN DURAMAX DIESEL ENGINES - PHOTOGRAPH TECH 2 CALIBRATION IDS, CALIBRATION VERIFICATION NUMBERS (CVNS) AND TRANSMISSION DATA SCREEN |
| PI0845 | 2016-11-29. Service bulletin. ELECTRICAL SYSTEM; ENGINE. THIS PRELIMINARY INFORMATIONAL BULLETIN PROVIDES A PROCEDURE TO PERFORM AN AIR LEAK INSPECTION TO CORRECT A CUSTOMER CONCERN ON AN ILLUMINATED MALFUNCTION INDICATOR LAMP (MIL), AND A REDUCED ENGINE POWER MESSAGE DISPLAYED DUE TO THE ENGINE CONTROL MODULE (ECM) DETECTING THAT THE DIESEL PARTICULATE FILTER (DPF) HAS ACCUMULATED 70 GRAMS OR MORE OF SOOT. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.