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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

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
37862006-01-07. Service bulletin. ENGINE AND ENGINE COOLING. NO START AFTER ENGINE HARNESS REPLACEMENT (NON-ABS). *TT
36442006-01-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. MOMENTARY SAG ON LIGHT TO MODERATE ACCEL WHEN COLD - VALVE DEPOSITS. *TT
34822005-11-07. Service bulletin. ENGINE AND ENGINE COOLING. CHECK ENGINE LIGHT, P0532, P0533, P2138, P1681, OR A/C INOPERATIVE (UPDATE). *TT
3310D2005-11-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON (SES) LIGHT DUE TO A P0171 - INSPECT AIR INTAKE AND OIL DIPSTICK. *TT
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
3269B2005-10-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. TICK NOISE AND MISFIRE DUE TO BROKEN VALVE SPRINGS. *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
34482005-10-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. DIAGNOSTIC TROUBLE CODE P2138 - INFORMATION SUPPLEMENT FOR BULLETIN 05-01-38-006. *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
34042005-10-12. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MACHINING DEBRIS ON THE OIL FILTER ELEMENT. *SC
34572005-05-11. Service bulletin. ENGINE AND ENGINE COOLING. SERVICE ENGINE SOON (SES) LIGHT ON OR VARIOUS DRIVEABILITY CONCERNS. ALSO TO INCLUDE 2005 PONTIAC PURSUIT. *TT
08042005-04-30. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL LIFE SYSTEM RESET PROCEDURES - CARS. *NM
32692005-04-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON (SES) LIGHT, MISFIRE AND VALVETRAIN TICK. *TT
050601003A2005-04-20. Service bulletin. ENGINE AND ENGINE COOLING. HIGHER THAN EXPECTED OIL CONSUMPTION BLUE SMOKE ON ACCELERATION. *EH

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