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Service bulletins for the 2012 Buick Regal

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.

1749 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
PIP4990A2017-08-15. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. This Preliminary Information communication provides information to the technician about vehicles with the service engine soon lamp that comes on. Technician may find Diagnostic Trouble Code U0101. Technician should review the appropriate Service Information diagnostics for DTC U0101. Also gather all other diagnostic trouble codes in the vehicle and which modules they are set in. The transmission connector pins should be checked for damaged terminals or poor terminal fit. Also inspect the under hood fuse block for damaged terminals or poor terminal fit and mis-positioned fuses in fuse block. Inspect the ground for the Transmission Control Module. Technician should refer to Service Information automatic transmission controls schematics to determine the ground identification.
PIT5076D2017-08-15. Service bulletin. ELECTRICAL SYSTEM; STEERING; SERVICE BRAKES. This Preliminary Information communication advises the technician to insure that global diagnostic service 2 diagnostic packages are up to date prior to learning the steering angle sensor for a diagnostic trouble code C710 symptom code 71 set in the electronic brake control module or the power steering control module. When rechecking for diagnostic trouble codes a U0074 U0077, U0180D, U01293, U0126, U0125, C0186, C0196, or C0287 are set and will not clear diagnose the Chassis bus. If no fault is found in the chassis bus check for an multiple diagnostic interface to data link connector issue. Technician is to try a different multiple diagnostic interface cable and attempt the steering angle sensor learn again following service information instruction then try to clear the codes again.
PIP4920M2017-08-15. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. This Preliminary Information communication advises the technician that the Battery Energy Control Module parts 20969054 and 22987539, Generator Control and Battery Module 23102218 and 23102217, and the Generator Battery Sections 1 And 2 part number 20813602 will remain on restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.
PIC5374C2017-08-15. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This Preliminary Information communication provides information to the technician about vehicles that have a frequent "off route" messages while following Turn by Turn route. Technicians will need to remove power from the Vehicle Communication Interface Module for one hour and retest for the concern.
PIT4864F2017-08-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary Information communication provides information to the technician about a customer?s request to install OnStar Bluetooth. Dealer should be advised at this time, there are no provisions to add this option to vehicles that were not built with it.
PIC4801F2017-08-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicles that may have an OnStar Turn-By-Turn Navigation the system that is inoperative. Technician verifies there are no Diagnostic Trouble Codes are present in the Antilock Braking System and Vehicle Communication Interface Module of the vehicle. If no Diagnostic Trouble Codes found call OnStar using the Blue button on the OnStar key pad and ask the advisor for a turn by turn route. Also make a OnStar personal call and a call into the vehicle. If normal diagnostics do not lead to a resolution technician will need to call General Motors Technical Assistance Center for further assistance.
PIC5491F2017-08-15. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This Preliminary Information communication provides information to the technician about vehicles that have an OnStar system that will not power up. Technician should turn off the ignition and cancel retained accessory power. After the vehicle has powered down remove power to the OnStar module for five minutes. After the power has been removed for five minutes, if the OnStar system is working release the vehicle. If the OnStar system is still inoperative continue with published Service Information diagnostics.
PIC5520K2017-08-15. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. This Preliminary Information communication advises the technician that the Drive Motor Generator Battery Module and Drive Motor Generator Battery Sections for the 2012 - 2014 Buick LaCrosse, Buick Regal, 2013 - 2014 Chevrolet Malibu ECO and 2014 Chevrolet Impala with eAssist are being placed on restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.
PIC5492E2017-08-15. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have a Diagnostic Trouble Code B101D-37 history in the Vehicle Communication Interface Module or telematics communication interface control module. Engineering has determined that this code will only display in history on the scan tool and will not cause issues with OnStar system operation.
PIC5491J2017-05-02. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT HAVE AN ONSTAR SYSTEM THAT WILL NOT POWER UP. TECHNICIAN SHOULD TURN OFF THE IGNITION AND CANCEL RETAINED ACCESSORY POWER. AFTER THE VEHICLE HAS POWERED DOWN REMOVE POWER TO THE ONSTAR MODULE FOR FIVE MINUTES. AFTER THE POWER HAS BEEN REMOVED FOR FIVE MINUTES, IF THE ONSTAR SYSTEM IS WORKING RELEASE THE VEHICLE. IF THE ONSTAR SYSTEM IS STILL INOPERATIVE CONTINUE WITH PUBLISHED SERVICE INFORMATION DIAGNOSTICS.
PIC5491J2017-04-10. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT HAVE AN ONSTAR SYSTEM THAT WILL NOT POWER UP. TECHNICIAN SHOULD TURN OFF THE IGNITION AND CANCEL RETAINED ACCESSORY POWER. AFTER THE VEHICLE HAS POWERED DOWN REMOVE POWER TO THE ONSTAR MODULE FOR FIVE MINUTES. AFTER THE POWER HAS BEEN REMOVED FOR FIVE MINUTES, IF THE ONSTAR SYSTEM IS WORKING RELEASE THE VEHICLE. IF THE ONSTAR SYSTEM IS STILL INOPERATIVE CONTINUE WITH PUBLISHED SERVICE INFORMATION DIAGNOSTICS.
PIT4720D2017-03-22. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN THAT AFTER REPLACING THE INSTRUMENT PANEL CLUSTER THE EXCHANGE CENTER IS UNABLE TO PROGRAM THE ACTUAL MILEAGE ON THE ODOMETER OR THE ACTUAL MILEAGE IS UNKNOWN. DEALER WILL NEED TO FOLLOW DEALER TO THE GENERAL MOTORS SERVICE POLICIES AND PROCEDURES MANUAL SECTION 5.2.4 ODOMETER SERVICING.
PIC5720B2017-03-17. Service bulletin. ELECTRICAL SYSTEM:WIRING; SERVICE BRAKES, AIR:ANTILOCK. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS NEEDED TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE BUZZ OR HUM NOISE IS HEARD IN THE RIGHT FRONT AT TIMES. ALSO MAY HAVE A ANTILOCK BRAKING SYSTEM MALFUNCTION INDICATOR LAMP, SERVICE BRAKE ASSIST MESSAGE OR SERVICE ENGINE SOON MALFUNCTION INDICATOR LAMP MAY BE DISPLAYED. THE FOLLOWING DIAGNOSTIC TROUBLE CODE MAY BE SET C027B, C0040 AND P0CBE. THE TECHNICIAN WILL INSPECT FOR THE WIRE HARNESS UNDER THE HOOD TO BE CONTACTING THE CRANK PULLEY, AIR CONDITIONING COMPRESSOR PULLEY OR ACCESSORY DRIVE BELT DUE TO MISROUTING OR NOT SECURED PROPERLY. REPAIR WIRING AS NEEDED OR REPLACE THE HARNESS, CORRECT ROUTING AND PROPERLY SECURE. ONCE WIRING REPAIRS ARE COMPLETE CONFIRM PROPER BRAKE BOOSTER VACUUM PUMP OPERATION.
PIC5520S2017-03-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN EASSIST DRIVE MOTOR GENERATOR BATTERY ARE NO LONGER ON PART RESTRICTION. TO ORDER THE EASSIST DRIVE MOTOR GENERATOR BATTERY SECTION CONTACT THE BATTERY SERVICE CENTER IN THE UNITED STATES OR THE ELECTRONIC SERVICE CENTER IN CANADA.
PIP4993B2017-03-15. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE A SERVICE CHARGING SYSTEM, BATTERY SAVER MESSAGE OR MALFUNCTION INDICATOR LAMP ON, AND/OR CHARGING SYSTEM INOPERATIVE. TECHNICIAN WILL USE GLOBAL DIAGNOSTIC SYSTEM 2 AND CLEAR THE DIAGNOSTIC TROUBLE CODES IN THE HYBRID POWERTRAIN CONTROL MODULE AND THE BATTERY ENERGY CONTROL MODULE. THEN TURN THE IGNITION OFF FOR A MINIMUM OF 2 MINUTES TO ALLOW THE HIGH SPEED LOCAL AREA NETWORK AND POWERTRAIN EXPANSION BUS TO POWER DOWN. START THE CAR AND MONITOR THE CHARGING SYSTEM VOLTAGE. IF THE CHARGING SYSTEM IS STILL INOPERATIVE THERE MAY BE A LOGIC LOCK CONDITION. DISCONNECT THE 12V BATTERY AND PERFORM A GLOBAL CAPACITIVE DISCHARGE AND REPEAT STEPS AGAIN.
PIC4310K2017-03-14. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLE THAT MAY HAVE AN ONSTAR SYSTEM THAT HAS PROGRESSION TONES WHEN PRESSING THE BLUE OR RED BUTTON. TECHNICIAN WILL NEED TO CALL GENERAL MOTORS TECHNICAL ASSISTANCE CENTER WITH THE SCAN TOOL DATA FROM THE ONSTAR SYSTEM.
12238A2017-01-26. Service bulletin. ENGINE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. 12238A - SERVICE UPDATE (REVISED SERVICE PROCEDURE). THE GENERATOR CONTROL MODULE (GCM) MAY NOT FUNCTION PROPERLY, RESULTING IN THE GRADUAL LOSS OF BATTERY CHARGE, ILLUMINATION OF THE MIL, AND EVENTUAL ENGINE STALL OR NO START CONDITION. DEALERS ARE TO INSPECT AND REPLACE THE GCM, IF NECESSARY.
122382017-01-26. Service bulletin. ENGINE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. 12238 - SERVICE UPDATE. THE GENERATOR CONTROL MODULE (GCM) MAY NOT FUNCTION PROPERLY, RESULTING IN THE GRADUAL LOSS OF BATTERY CHARGE, ILLUMINATION OF THE MIL, AND EVENTUAL ENGINE STALL OR NO START CONDITION. DEALERS ARE TO INSPECT AND REPLACE THE GCM, IF NECESSARY.
1200890082016-11-29. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. THIS INFORMATIONAL BULLETIN PROVIDES INFORMATION ON THE SERVICEABILITY OF HIGH VOLTAGE VOLT BATTERIES AND THE ESSENTIAL TOOLS USED TO SERVICE THEM
PI08352016-11-29. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATIONAL BULLETIN PROVIDES A PROCEDURE ON HOW TO REPLACE A KEY WITH AN INTERGRATED TRANSMITTER ON IT FOR CONDITIONS RELATED TO KEYS WITH INTERGRATED TRANSMITTERS INOPPERATIVE DUE TO PERMATURE DRAIN OF TRANSMITTER BATTERY.
PI0086D2016-11-10. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATIONAL BULLETIN PROVIDES A LIST OF CORRECTIONS FOR MULTIPLE CONCERNS REGARDING UNEXPECTED LOSS OF RADIO AUDIO (RADIO GOES SILENT/NO SOUND) AND OTHER BLACKBERRY PHONE - BLUETOOTH ISSUES
PIT5485A2016-11-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN, IF UNABLE TO PLACE AN ONSTAR CALL IN THE IGNITION ON MODE AFTER THE ONSTAR CANADA UPGRADE TO CONTACT THE GM TECHNICAL ASSISTANCE CENTER ONSTAR GROUP FOR FURTHER ASSISTANCE.
PIT5485B2016-11-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN IF UNABLE TO PLACE AN ONSTAR CALL IN THE IGNITION ON MODE AFTER THE ONSTAR CANADA UPGRADE, TO CONTACT THE GM TECHNICAL ASSISTANCE CENTER ONSTAR GROUP FOR FURTHER ASSISTANCE.
PIP5168E2016-11-01. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN ON THE STEPS TO DIAGNOSE THE CONCERN, AND THE STEPS TO REPAIR THE CONCERN OF THE VEHICLE CRANKS BUT DOES NOT START. THE TECHNICIAN IS TO INSPECT FOR A SHEARED CAM PIN IN THE ENGINE.
PIC4935E2016-10-25. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO HELP THE DEALERSHIP TECHNICIANS PERFORM A PARASITIC DRAIN TEST FOR THE ONSTAR MODULE. WHEN PERFORMING BATTERY PARASITIC DRAIN TEST, THERE MAY BE SOME CONFUSION AS TO WHAT THE NORMAL POWER CONSUMPTION READING SHOULD BE FROM THE ONSTAR SYSTEM.

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