WenmarOpen by Wenmar Pro

Service bulletins for the 2004 Chevrolet Impala

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.

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

By type

By component

By trouble code

Bulletins, newest first
0307300292005-03-08. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. CHANGES FOR 2004 MODEL YEAR FOR 4T65E TRANSAXLE - INTERNAL CHANGES TO VALVE BODY, SPACER PLATE AND CHANNEL PLATE AND TOUCH ACTIVATED POWER (TAP). *TT
0403080102005-02-17. Service bulletin. SUSPENSION. CHANGES TO LABOR TIME GUIDE RELATING TO FRONT SUSPENSION LABOR OPERATIONS COMPONENTS. *EH
0308490232005-02-16. Service bulletin. STRUCTURE:BODY. LOUD POP OR SNAP NOISE COMING FROM INSTRUMENT PANEL (IP) IN HIGH AMBIENT TEMPERATURES. THIS SERVICE BULLETIN REPLACES 030849023. *EH
020730013D2005-02-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. INCORRECT TRANSMISSION SHIFTS POOR ENGINE PERFORMANCE HARSH 1-2 UPSHIFTS SLIPS 1ST AND REVERSE TORQUE CONVERTER CLUTCH STUCK OFF ON DIAGNOSTIC TROUBLE CODE P0730, P0756, P0757, P0741, P0742. *EH *TT
0406010212005-02-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. NEW REAR MAIN SEAL AND SPECIAL TOOL FOR INSTALLATION. *TT
0401380092005-02-14. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. POOR A/C PERFORMANCE - A/C WILL NOT BLOW COLD ENOUGH, RECIRCULATION MODE DOOR INOPERATIVE, DIAGNOSTIC TROUBLE CODES (DTCS) B0268 AND B0269 SET. *TT
04081100072004-12-29. Service bulletin. STRUCTURE. INSTRUMENT PANEL GAP APPEARANCE. *TT
0408470032004-12-29. Service bulletin. ELECTRICAL SYSTEM. SECURITY LIGHT ON, ENGINE WILL NOT CRANK, DIAGNOSTIC TROUBLE CODES B2958 AND/OR B2960. *TT
30642004-11-17. Service bulletin. ELECTRICAL SYSTEM:IGNITION. DELAYED CRANK, MAY BE NECESSARY TO HOLD KEY IN START SEVERAL SECONDS UNTIL START. *TT
31602004-11-10. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. NOISY OR INOPERATIVE A/C COMPRESSOR. *TT
31022004-11-05. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN. SERVICE VME 01-04 VEHICLE EQUIPPED WITH 4T65E AUTOMATIC TRANSMISSION 4T65E TRANSMISSION VALVE BODY INSPECTION PROCEDURE. (TO INCLUDE 2004 PONTIAC AZTEC) *SC ALL 2001 - 2006 PASSENGER VEHICLES WITH 4T65E TRANSAXLE. *TT
30972004-11-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. HVAC SIDE TO SIDE TEMPERATURE DIFFERENCE. *SC
31062004-11-04. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. XM RADIO WAS WORKING PRIOR TO JULY 26, 2004 AND IT IS INOPERATIVE NOW. *JB
31012004-11-04. Service bulletin. UNKNOWN OR OTHER. INOPERATIVE A/C VENT LOUVERS. *JB
31042004-11-03. Service bulletin. STRUCTURE. GAP APPEARANCE BETWEEN THE I/P TOPPER PAD AND I/P TRIM PLATE. *SC
31292004-11-03. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. A/C EVAPORATOR FREEZING. *TC
30432004-10-14. Service bulletin. ELECTRICAL SYSTEM. INTERMITTENT SECURITY LAMP ON. DIAGNOSITC TROUBLE CODE B2958 OR B2960 MAY OR MAY NOT BE PRESENT. *TT
041920042004-09-17. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. AS A RESULT OF A RECENT CHANGE IN THE HEADLAMP REFLECTOR, IT IS NOW POSSIBLE TO ELIMINATE THE HEADLAMP BULB SHIELD ON THE LOW BEAM BULB OF THE HEADLAMP ASSEMBLY WITHOUT ANY NOTICEABLE CHANGE IN LIGHTING PERFORMANCE. GM VOICEMAIL EXPRESS. *TT
041320042004-09-17. Service bulletin. STRUCTURE:BODY:TRUNK LID. THIS MESSAGE IS IN REGARD TO THE ELIMINATION OF THE TRUNK LID ASSIST HANDLE. CHANGES IN THE TRUNK LID HINGE AND STRUT DESIGN HAS RESULTED IN IMPROVEMENTS IN THE TRUNK LID EFFORTS. GM VOICEMAIL EXPRESS. *TT
040820042004-09-17. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:ROTOR. THE CURRENT BRAKE ROTOR MINIMUM ALLOWABLE THICKNESS AFTER REFINISH, OR MINIMUM THICKNESS SPECIFICATION, FOUND IN THE PAST SERVICE MANUAL APPLICATIONS ARE INCORRECT. PLEASE USE CORRECT INFORMATION AS FOLLOWS. *TT
012320042004-09-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. TRANSMISSION FLUID LEAK FROM REVERSE SERVO COVER AT AMBIENT TEMPERATURES. TRANSMISSION FLUID MAY BE DETECTED ON THE LOWER PAIN RAIL OR CASE SIDE. MOST LEAK REPORTS HAVE BEEN FOUND DURING PREDELIVERY INSPECTION. GM VOICEMAIL EXPRESS. *TT
30112004-08-25. Service bulletin. EQUIPMENT. WHEN USING VOICE RECOGNITION DIALING, SOME NUMBERS OR COMMANDS MAY NOT BE UNDERSTOOD BY THE SYSTEM ESPECIALLY THE NUMBER TWO (2). *TT
30092004-08-25. Service bulletin. ELECTRICAL SYSTEM:IGNITION. SERVICE VME - IP TOP PAD TO TRIM PLATE GAP. *MJ
30022004-08-24. Service bulletin. ELECTRICAL SYSTEM. UNABLE TO PROGRAM NEW BODY CONTROL MODULE (BCM). *MJ
30062004-08-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE MECHANICAL NOISE. VARIOUS MODELS INCLUDING THE 2005 PONTIAC GRAND PRIX. *TT

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