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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: Alternator are shown. Show all

Bulletins, newest first
PIP4989D2017-08-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. This Preliminary Information communication provides the technician with the steps to diagnose and repair a vehicle with a broken, noisy, worn or misaligned Drive Motor Generator belt resulting in a no charge concern. Dealer will follow the instructions to replace the belt if broken and use a laser belt alignment tool to correctly align the new belt. Inspect the drive belt tensioner strut assembly to ensure that it is installed correctly. If the strut is upside down remove and install correctly.
PI14042017-08-15. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. This preliminary informational bulletin provides a diagnostic tip for low line pressure or pressure regulator valve stuck after transmission service pump cover replacement.
PIC5520J2016-06-22. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
PIC5520H2016-06-22. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
PIC5520G2016-06-22. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
PIC5520F2016-06-22. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
13142B2016-06-09. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
13142A2016-06-09. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
131422016-06-09. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
13136C2016-06-09. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
13136B2016-06-09. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
13136A2016-06-09. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
131362016-06-09. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-0000156089-A2016-03-31. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-13136-C2016-03-16. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-13142-B2016-03-16. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-13136-B2016-03-16. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-12238-D2016-03-16. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-13142-A2016-03-16. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-13136-A2016-03-16. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
12238-D2013-04-03. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. GENERAL MOTORS: SERVICE UPDATE FOR INVENTORY VEHICLES ONLY LOSS OF BATTERY CHARGE. INSPECT GENERATOR CONTROL MODULE EXPIRES OCTOBER 31, 2013. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO INSPECT AND REPLACE, IF NECESSARY, THE GENERATOR CONTROL MODULE(GCM). *JS RECEIVED REVISION A AFTER RECEIVING REVISION D. *KB
PIP-4989-B2012-06-18. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. BUICK/CHEVROLET: ON CERTAIN EASSIST VEHICLES, BELT FOR THE DRIVE MOTOR GENERATOR MAY BE NOISY, BROKEN, MISALIGNED OR WORN, RESULTING IN A NO CHARGE CONCERN WITH THE MESSAGE, BATTERY SAVER ILLUMINATED. *PE UPDATED ON 5/9/2013. *KB
PIP-49922012-04-04. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. BUICK/CHEVROLET: THE COOLING FAN MAY BE INOPERATIVE DUE TO LOW SYSTEM VOLTAGE WITH THE BATTERY CONTROL MODULE (HYBRID POWERPACK) AND DRIVE MOTOR GENERATOR. *PE UPDATED /15/12. *PE UPDATED 8/17/12. *PE
PIP-49832012-03-14. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. BUICK: CHECKING DATE CODE AND THE TESTING OF HIGH VOLTAGE INTERLOCK LOOP (HVIL) COVER RESISTANCE ON CERTAIN MODEL YEAR VEHICLES. *PE
PIC-55202011-10-04. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. BUICK/CHEVROLET: THE BATTERY MODULE AND EASSIST GENERATOR CONTROL FOR BAS+(HYBRID) EXCHANGE PROCESS IS BEING PLACED ON RESTRICTIONS. *PE UPDATED 5/8/2013 *JS UPDATED ON 6/26/2013. *KB UPDATED ON 7/8/2013. *KB

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