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Service bulletins for the 2004 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.

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

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By trouble code

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

Bulletins, newest first
PIC-4935-E2016-08-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; 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.
PIC-5050-A2016-08-17. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THE STEPS ON REPAIRING THE CONCERN. A CUSTOMER MAY IDENTIFY A CONCERN OF UNABLE TO REACTIVATE A VEHICLE'S ONSTAR THAT HAS BEEN PREVIOUSLY DISABLED BY ONSTAR. DEALER IS TO CALL GENERAL MOTORS TECHNICAL ASSISTANCE CENTER FOR FURTHER ASSISTANCE IF THE CONCERN IS STILL PRESENT.
08089-B2009-02-10. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). GENERAL MOTORS CORP: SPECIAL COVERAGE ADJUSTMENT; ANALOG ONSTAR DEACTIVATION. *PE UPDATED 2/17/09. *PE
33542005-05-12. Service bulletin. ELECTRICAL SYSTEM. ENGINE WIRING HARNESS CAUSING MULTIPLE DRIVEABILITY CONCERNS. *EH
041420042004-09-17. Service bulletin. ELECTRICAL SYSTEM. WITH THE AC ON, LED APPEARS TO TOGGLE ON AND BACK OFF IN ONE UNIQUE CONDITION. THIS CONDITION IS THE HEADLAMPS ARE ON, INSTRUMENT PANEL LAMPS ARE DIMMED TO THE LOWEST EXTREME, DAYTIME CONDITIONS AND THE REAR DEFOG BUTTON IS TURNED ON AND OFF OR ALLOWED TIME TO TIMEOUT. ENGINEERING INVESTIGATED HAS DETERMINED THE CONDITION IS NORMAL. *TT
041320042004-09-17. Service bulletin. ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS. INSTRUMENT PANEL FUSE NUMBER TEN FAILURE. GM VOICEMAIL EXPRESS. *TT
020272004-05-20. Service bulletin. ELECTRICAL SYSTEM. A/C ON LED INOPERATIVE OR APPEARS TO TOGGLE ON AND OFF. ALSO INCLUDING 2005 BUICK CENTURY AND 2005 BUICK REGAL. *MR
020382004-05-20. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE B1000. *MR
020332004-05-19. Service bulletin. ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS. HVAC INSTRUMENT PANEL FUSE 10 FAILURE. *MR
015832004-02-25. Service bulletin. ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD. ENGINE WIRING HARNESS CAUSING MULTIPLE DRIVEABILITY CONCERNS DIAGNOSTIC TROUBLE CODES (DTCS). *TT *MJ
0917032004-01-27. Service bulletin. ELECTRICAL SYSTEM. ANTI-LOCK BRAKE SYSTEM (ABS) OR TRACTION CONTROL SYSTEM (TCS) LIGHT OR LIGHTS ON WITH ONE OR MORE DIAGNOSTIC TROUBLE CODES (DTCS). GM VOICEMAIL LOG. *TT
0917032004-01-27. Service bulletin. ELECTRICAL SYSTEM. INSTRUMENT PANEL CLUSTER FUNCTION INTERMITTENTLY INOPERATIVE, ESPECIALLY FUEL GAUGE OR PRINDEL, INTERMITTENT ENGINE NO CRANK OR NO START WITH A SECURITY LIGHT ON, CANNOT REMOVE THE TRANSAXLE SELECTOR LEVER FROM THE PARK POSITION, AND SCS, ANTI-LOCK BRAKE SYSTEM (ABS) OR TRACTION CONTROL SYSTEM (TCS) LIGHTS ON WITH DIAGNOSTIC TROUBLE CODES (DTCS) B1422, B2957 OR B2958. GM VOICEMAIL LOG. *TT
1009032004-01-22. Service bulletin. ELECTRICAL SYSTEM. REPLACEMENT OF A BODY CONTROL MODULE (BCM) OR IGNITION SWITCH DUE TO LACK OF IGNITION ONE OR IGNITION ZERO VOLTAGE. GM VOICEMAIL LOG. *TT
0308450042004-01-07. Service bulletin. ELECTRICAL SYSTEM. INTERMITTENT SERVICE ENGINE SOON (SES), ANTI-LOCK BRAKE (ABS) OR TRACTION CONTROL SYSTEM (TCS) LAMP ILLUMINATED, ENGINE NO CRANK/NO START, VARIOUS INSTRUMENT PANEL (I/P) CLUSTER INTERMITTENTS, DIAGNOSTIC TROUBLE CODES (DTCS) U1000, U1016, B1422, B2957, B2958 SET, SHIFTER LOCKED IN PARK. *TT
01391A2003-11-24. Service bulletin. ELECTRICAL SYSTEM. INTERMITTENT INSTRUMENT PANEL CLUSTER (IPC) INOPERATIVE (FUEL GAUGE OR PRNDL), ENGINE NO CRANK OR START WITH THE SECURITY LIGHT ON, CANNOT REMOVE THE TRANSAXLE SELECTOR LEVER FROM THE PARK POSITION; OR SES, ABS, OR TCS WARNING LIGHTS ON. *TT
014372003-11-21. Service bulletin. ELECTRICAL SYSTEM. ANTI-LOCK BRAKING SYSTEM (ABS) OR TRACTION CONTROL SYSTEM (TCS) LIGHT ON WITH DIAGNOSTIC TROUBLE CODES (DTC)S. *TT

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