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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
7092005-12-15. Service bulletin. ENGINE AND ENGINE COOLING. OIL LIFE SYSTEM RESET PROCEDURES - CARS. GM TECH LINK. *TT
0506040582005-11-11. Service bulletin. VEHICLE SPEED CONTROL. INTERMITTENT CHUGGLE OR FISHBITE ON LIGHT ACCELERATION OR A HIGHWAY SPEEDS WITH NO DIAGNOSTIC TROUBLE CODES (DTCS). *TT
0502320032005-11-09. Service bulletin. STEERING. REVISED OUTER TIE ROD END NUT TIGHTENING SPECIFICATION/TIE ROD END JAM NUT TIGHTENING SPECIFICATION ADDED. *TT
35002005-11-01. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT. ABS LIGHT COMING ON AND CODES C1225, C1226, C1232, C1233, C1276 AND/OR C1277 ARE FOUND IN THE EBCM. *TT
3157A2005-10-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE WHINE OR BUZZ NOISE SOUNDS LIKE A GENERATOR TYPE NOISE ON 3.1L OR 3.8L ENGINES. *TT
32962005-10-26. Service bulletin. POWER TRAIN. DRIVE SPROCKET SUPPORT BEARING MISSING OR DTC P0741 AND P0742. *SC
3365A2005-10-24. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. TICKING OR KNOCKING NOISE CRACKED OR BROKEN FLEXPLATE. VARIOUS MODELS INCLUDING OLDSMOBILE BONNEVILLE 2006. *TT
7022005-09-09. Service bulletin. STRUCTURE:BODY. INSTRUMENT PANEL (I/P) APPEARANCE. GM TECH LINKS. *TT
050846006A2005-05-14. Service bulletin. EQUIPMENT. INFORMATION ON UPGRADING CERTAIN ONSTAR GENERATION 5 ANALOG/DIGITAL-READY SYSTEMS TO ONSTAR GENERATION 6 DUAL-MODE (ANALOG/DIGITAL). *TT
0508440082005-05-14. Service bulletin. EQUIPMENT:ELECTRICAL. STATIC, POOR AND/OR NO RADIO RECEPTION IN POLICE PACKAGE EQUIPPED VEHICLES (NO FIX AVAILABLE AT THIS TIME). *TT
33542005-05-12. Service bulletin. ELECTRICAL SYSTEM. ENGINE WIRING HARNESS CAUSING MULTIPLE DRIVEABILITY CONCERNS. *EH
33822005-05-12. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. 4T65E (MN7) TRANSMISSION FLUID LEAK ON RIGHT SIDE AXLE SEAL. *TT
33672005-05-11. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 3-2 DOWNSHIFT BUZZ NOISE ON 2004 AND 2005 POLICE IMPALAS EQUIPPED WITH THE 3800 V6 ENGINE AND THE 4T65E TRANSMISSION. *TT
34772005-05-11. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR. TECH 2 DISPLAYS ASTERISK FOR THE LEFT FRONT WHEEL SPEED SENSOR. *TT
08042005-04-30. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL LIFE SYSTEM RESET PROCEDURES - CARS. *NM
0506040022005-04-20. Service bulletin. ENGINE AND ENGINE COOLING. WHISTLE NOISE ON LIGHT ACCELERATION. *EH
0408570072005-04-19. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. HEADLINER WET AROUND SUN ROOF. *EH
030849018A2005-04-13. Service bulletin. LATCHES/LOCKS/LINKAGES. CONSOLE LID OR STORAGE ARMREST LATCH REPLACEMENT. *TT
071420042005-04-12. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. INCORRECT PARTS INFORMATION FOR SERVICING THE CONSOLE LID OR STORAGE ARMREST ASSEMBLY. *EH
070820042005-04-12. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. GM SERVICE TECHNICAL COLLEGE. *EH
062820042005-04-11. Service bulletin. WHEELS:LUGS/NUTS/BOLTS/STUDS. LEFT AND RIGHT FRONT WHEEL ASSEMBLIES IN WHICH THE TWO BOLTS THAT ATTACH THE FRONT BRAKE CALIPER TO THE STEERING KNUCKLE WERE NOT TIGHTENED ADEQUATELY. CAMPAIGN 04094 IS SCHEDULED. *TT
110520032005-04-08. Service bulletin. FUEL SYSTEM, OTHER. DIAGNOSTIC TROUBLE CODES P0440 AND P0455, ALONG WITH A LOOSE FUEL CAP MESSAGE DISPLAYED ON THE DIC ON VEHICLES WITH 3800 ENGINE APPLICATIONS. *TT
0408670082005-03-14. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. SUNROOF CREAK. *TT
0408520012005-03-10. Service bulletin. ELECTRICAL SYSTEM. SETUP PROGRAMMING BCM FOR REMOTE KEYLESS ENTRY. *EH
0405230022005-03-09. Service bulletin. SERVICE BRAKES, HYDRAULIC. BRAKE ROTOR MINIMUM ALLOWABLE THICKNESS AFTER REFINISH SPECIFICATION CORRECTION. *TT

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