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Service bulletins for the 2005 Chevrolet Cobalt

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.

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

By type

By component

By trouble code

Bulletins, newest first
34102005-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. CHECK ENGINE LIGHT (MIL) ON. THE ENGINE MAY NOT CRANK OVER. DIAGNOSTIC TROUBLE CODES P0443, P0102, P0036, P0030, P0135, P0101 MAY BE SET. *TT
33932005-10-28. Service bulletin. EXTERIOR LIGHTING. BACKLIGHTING IS INOPERATIVE DURING DAYLIGHT CONDITIONS (HEADLIGHT SWITCH TURNED ON MANUALLY). *TT
3269B2005-10-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. TICK NOISE AND MISFIRE DUE TO BROKEN VALVE SPRINGS. *TT
33162005-10-28. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE P0420 MAY SET ON LOW MILEAGE VEHICLES, OR SHORTLY AFTER CATALYTIC CONVERTER REPLACEMENT. *TT
32742005-10-28. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM. INACCURATE AND/OR ERRATIC FUEL GAUGE OPERATION. *TT
33472005-10-28. Service bulletin. EXTERIOR LIGHTING:BRAKE LIGHTS. BRAKE LIGHTS INOPERATIVE WITH KEY IN THE OFF POSITION. *TT
33232005-10-28. Service bulletin. ENGINE AND ENGINE COOLING. HIGHER THAN EXPECTED OIL CONSUMPTION BLUE SMOKE ON ACCELERATION. TO INCLUDE 2005 OLDSMOBILE ALERO. *TT
33162005-10-27. Service bulletin. STRUCTURE. WATER LEAK ON FRONT FLOORBOARD AND OR BLOWER MOTOR INOPERATIVE. *SC
32532005-10-24. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. VEHICLE WILL NOT MOVE IN EITHER DIRECTION. TRANSMISSION MAY SHOW OVER FULL. P90 4T40E 4T45E NO MOVEMENT DRIVE OR REVERSE. CONVERTER MAY BE EMPTY OF FLUID. *TT
34482005-10-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. DIAGNOSTIC TROUBLE CODE P2138 - INFORMATION SUPPLEMENT FOR BULLETIN 05-01-38-006. *TT
34472005-10-24. Service bulletin. POWER TRAIN. 4T40E OR 4T45E WILL NOT SHIFT NO DIAGNOSTIC TROUBLE CODES. *TT
34412005-10-21. Service bulletin. POWER TRAIN. 4T40E/4T45E HARD TO SHIFT. *TT
34332005-10-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON (SES) LIGHT AND SEVERE ENGINE MISFIRE ON CYLINDERS 1 AND 4 OR CYLINDERS 2 AND 3. *TT UPDATED 08-15-07. *KB
34922005-10-21. Service bulletin. ELECTRICAL SYSTEM. SERVICE ENGINE SOON (SES) LIGHT AT HIGHWAY SPEEDS DUE TO A P0171 DIAGNOSTIC TROUBLE CODE (DTC). *TT
3393A2005-10-20. Service bulletin. EXTERIOR LIGHTING. BACKLIGHTING IS INOP DURING DAYLIGHT CONDITIONS (HEADLIGHT SWITCH TURNED ON MANUALLY) *SC
36872005-10-18. Service bulletin. SUSPENSION. CLUNK NOISE FROM FRONT OF VEHICLE DURING TURNING MANEUVER. *SC
34042005-10-12. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MACHINING DEBRIS ON THE OIL FILTER ELEMENT. *SC
3385A2005-09-21. Service bulletin. ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS. REPEATED PARK LPS FUSE OPEN (ADDITIONAL INFORMATION). *TT
36352005-09-21. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP. NO COMMUNICATION WITH ANTI-LOCK BRAKING SYSTEM AFTER EBCM REPLACEMENT. TO INCLUDE 2006 CHEVROLET HHR. *TT
3512C2005-09-20. Service bulletin. ELECTRICAL SYSTEM. SERVICE ENGINE SOON (SES) LIGHT DUE TO A P1182 DIAGNOSTIC TROUBLE CODE - POTENTIAL CAUSES AND ISSUES. *TT
35102005-09-20. Service bulletin. VEHICLE SPEED CONTROL. SUPPLEMENT TO 05-06-01-003A - WRONG THROTTLE GASKET PART NUMBER. *TT
35092005-09-20. Service bulletin. FUEL SYSTEM, OTHER. EVAP FILLER NECK ADAPTER GE41415-50 MAY NOT FIT - USE J41415-40 IF NECESSARY. *TT
7022005-09-09. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP. ANTI-LOCK BRAKING SYSTEM (ABS) CODE U2108. GM TECH LINKS. *TT
050462005-08-18. Service bulletin. ELECTRICAL SYSTEM:WIRING. A/C SYSTEM WIRING AND DUAL STAGE AIRBAG MODULE WIRING. *TT
6122005-08-11. Service bulletin. ELECTRICAL SYSTEM. SIR LAMP BEING DISPLAY AND CODES B0012 AND B0013 WITH SYMPTOM CODE 0E. GM TECH LINK. *TT

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