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Service bulletins for the 2002 Buick Century

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.

386 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
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.
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.
PIP5094A2016-09-26. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT ,WHEN TESTING ANY CIRCUIT FOR OPEN OR RESISTANCE, IT IS IMPERATIVE THAT ALL RELATED TERMINAL PIN FIT AND TENSION BE CHECKED WHEN THE TEST STEPS REQUIRE DISCONNECTION OF THE CONNECTOR OR COMPONENT, PRIOR TO ANY COMPONENT REPLACEMENT. ALWAYS USE THE RECOMMENDED TERMINAL TEST TOOL DURING THESE TESTS.
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
572005-09-13. Service bulletin. ELECTRICAL SYSTEM:WIRING. WIRE HARNESS MAY BE STRETCHED, OR THE PCS MAY NOT BE ORIENTED IN THE SAME POSITION, AFTER INSTALLING A SERVICE REPLACEMENT VALVE BODY ASSEMBLY. GM TECH LINK. *TT
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
005792004-06-29. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE B 1001 IN BCM AND/OR POWERTRAIN CONTROL MODULE (PCM) SPEAICAL PROCEDURE. *MJ
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
017402004-04-27. Service bulletin. ELECTRICAL SYSTEM:WIRING. CROSS INJECTOR WIRES CAUSING MISFIRE AT STEADY STATE SPEED AND RPM, MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED, AND A P0300 SET. SIT BULLETIN 1460291. *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
0308440052003-04-15. Service bulletin. ELECTRICAL SYSTEM. POOR RADIO RECEPTION OR RADIO STATIC/ INCREASED INTERFERENCE WITH REAR WINDOW DEFOGGER ON OR SOME REAR WINDOW DEFOGGER GRIDS MAY BE INOPERATIVE. *TT
0508022002-11-10. Service bulletin. ELECTRICAL SYSTEM. SIR DIAGNOSTIC TROUBLE CODES B0041 WHICH A LEFT FRONT DRIVERS SEAT OPEN DEPLOYMENT LOOP OR B1001 OPTION CONFIGUARTION ERROR. *TT
0208460052002-10-04. Service bulletin. ELECTRICAL SYSTEM:IGNITION:MODULE. SUBJECT REGARDNG THE ADDITION OF DIAGNOSTIC TROUBLE CODE U1500 FOR GENERATION 4 ONSTAR. *TT

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