Service bulletins for the 2015 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.
1526 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| PIC5322D | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary Information communication advises the technician of a customer concern where the heated seat indicator light is not functioning or the heated seats are not up to operating temperature during a remote vehicle start event. This is normal operation of the heated seat during a remote vehicle start event. The electronic climate control module is not in a complete wake up state during a remote vehicle start mode and will not enable the light emitting diode. After a cold soak below 32 degrees Fahrenheit the seat will not get hot in the 10 minutes or less of the remote vehicle start mode. This is due to the fact that the heat element is not in direct contract with the seat surface while the seat is unoccupied and the foam below the heater is full cold insulating air which takes time to heat up. Technician is to communicate to the customer this condition is a normal operating characteristic of their vehicle. It will not impact the designed performance or reliability of the vehicle. Please share this information with the customer, including a copy of this message. |
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| PIP5296 | 2017-08-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary Information communication advises the technician of a possible grind or growl noise from the transmission while moving. If the technician disassembles the transmission, technician may find a front differential drive pinion gear bearings and or differential carrier bearings are damaged. Technician will need to contact General Motors Technical Assistance Center before attempting to remove the damaged bearings. |
| PIT5076E | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. 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. |
| PIP4920P | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This Preliminary Information communication advises the technician that the part restriction on the Battery Energy controls module has ended the part is now available through parts department and doesn?t require a Technical Assistance Center authorization. |
| PIT5231C | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Preliminary Information communication provides information to the technician about vehicles that may have a blank radio display. Technician may find a Diagnostic Trouble Code U150F stored in the Radio / Heater-Vent-Air Conditioning controls. Technician will verify if the correct display is installed. If the Diagnostic Trouble Code is current inspect the circuit form end to end. |
| PIT5401 | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Preliminary Information communication provides information to the technician for vehicles with the radio inoperative. The technician may find no communication with the radio and a diagnostic trouble code U0184 set in other modules. Technician is to call General Motors Technical Assistance Center for direction before attempting to diagnose or repair this concern. |
| PIC5520M | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This Preliminary Information communication advises the technician that the Drive Motor Generator Battery Module and Drive Motor Generator Battery Sections for the 2012 - 2015 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. |
| PIC5779F | 2017-08-15. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. This Preliminary Information communication provides the technician with information on the proper washing of the bright aluminum moldings to avoid the moldings from getting damaged. It is recommended that a non-alkaline solution be used for preparation & washing of the bright aluminum moldings. |
| PIC5839C | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that may have a clock that is slow to update while driving when the clock auto set feature enabled. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. |
| PIC5910C | 2017-08-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication provides information to the technician about vehicles that have a Diagnostic Trouble Code B124B sym 04 in the HMI module. Technician should check the USB port operations if no issue found it should be considered a false code and no components should be replaced. If the USB port is inoperative technician should follow published Service Information diagnosis for Auxiliary Audio Input Malfunction. |
| PIC6085 | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that are unable to access XM Weather. If the system responds by highlighting the XM Weather Icon but it does not enter the application technician should replace the Human Machine Interface module for this concern. |
| PIT5399 | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL. This Preliminary Information communication provides information to the technician about connectivity concerns when connecting an Apple device via USB cord. Technician should insure the customer is using an original equipment manufacturer Apple USB cable. |
| PIC4310L | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); 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. |
| PIP5282 | 2017-08-15. Service bulletin. ENGINE AND ENGINE COOLING. 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. |
| PIT5411B | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication advises the technician that the Human Machine Interface, Radio or Tuner, radio controls, Integrated Center Stack, display, and Media Disc Players are placed on restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance. |
| PIP5090G | 2017-08-15. Service bulletin. SUSPENSION. This Preliminary Information communication provides information to the technician about vehicles that may have a noise, vibration or shudder on acceleration from a stop. Technician may find that the right front axle shaft is not fully seated into the transfer case. Technician will need to inspect the splines on the half shaft for damage. If damage is found replace the half shaft and install a new retaining ring with part number 90223082. When the half shaft does not have damage to the splines technician should replace the retaining ring with part number 90223082. |
| PIC6070A | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This Preliminary Information communication provides information to the technician about vehicles that the Navigation radio does not have a global positioning system location but OnStar is able to accurately locate the vehicle. Technician should check the installation of the COAX cables to be router correctly. Technician will gain access to the Radio or Human Machine Interface depending on the vehicle build. Install the EL-49903 test antenna to the Radio HMI and evaluate the operation. If the GPS signal is restored, inspect for incorrect coax routing as described above and if found, reroute the cable so it does not bypass the splitter. |
| PIC6070 | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This Preliminary Information communication provides information to the technician about vehicles that the Navigation radio does not have a global positioning system location but OnStar is able to accurately locate the vehicle. Technician should check the installation of the COAX cables to be router correctly. Technician will gain access to the Radio or Human Machine Interface depending on the vehicle build. Install the EL-50334 test antenna to the Radio HMI and evaluate the operation. If the GPS signal is restored, inspect for incorrect coax routing as described above and if found, reroute the cable so it does not bypass the splitter. |
| PIC5953A | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL. This Preliminary Information communication provides information to the technician about vehicles that may have an issue when using Bluetooth voice recognition with an iPhone. Technician should work with the customer to insure the phone contacts to not have any Emojis loaded to any contact. |
| PIC6067 | 2017-08-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication provides information to the technician about vehicles that may have a Diagnostic Trouble Code B101D sym 39 in the Human Machine Interface. Technician should not replace any parts for this concern. |
| PIT5264C | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This Preliminary Information communication provides information to the technician about vehicles that are travelling from Canada to the United States. While in the United States they are unable to receive Turn-by-Turn directions. Due to the existing cellular provider not having roaming agreements in areas outside of Canada to support transmitting of the packet data required for Turn-By-Turn feature to operate. The customer has 3 options while traveling through the United Sates. First if the vehicle is equipped with a navigation radio they can request a "Destination Download" to the vehicle. Second if the customer uses the OnStar RemoteLink app they can send the directions to the vehicle. The third option would be to have the vehicle loaded with a "500 phone number" The customer will no longer be able to use their Hands Free Calling minutes when the new 500 phone number is loaded. If a customer chooses to restore Hands Free Calling in the future a new phone number will be assigned to the vehicle; previous phone numbers are not available. |
| PIT5344A | 2017-08-15. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Preliminary Information communication advises the technician about vehicles that have an inoperative CD player. Technician should contact General Motors Technical Assistance Center if the concern is current and within four hours of the dealership. For dealers outside of this area, diagnose and repair as necessary. |
| PIP4548D | 2017-08-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This Preliminary Information communication advises the technician what to inspect if codes P0016 and/or P0017 are setting on a properly timed engine or a condition of the vehicle cranks but will not start. Technician should inspect the respective intake or exhaust camshaft reluctor to see if it has spun on the camshaft. The reluctor cannot be repositioned so the camshaft must be replaced. The new camshafts come with the reluctor already pressed on in the correct position. |
| PIT5367 | 2017-08-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This Preliminary Information communication provides information to the technician about vehicles that may have a blank displays, flashing displays, "Error or Update failed Messages", navigation map not loading, Bluetooth or USB concerns. Technician should inspect the USB/SD card port for a SD card or a device plug into any of the USB ports. |
| PIP4993B | 2017-08-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 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. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.