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Service bulletins for the 2004 Chevrolet Express

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.

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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
3691B2006-03-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. GENERATION III V8 ENGINE PISTON REPAIRS. *TT
0506010142005-11-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL LEAK UNDER EXTREME COLD TEMPERATURES (-34 DEGREES C) (-30 DEGREES F) OR COLDER). *TT
0506040462005-11-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. CRANK AND NO START, REDUCED POWER, INTERMITTENT HESITATION, HESITATES IN HIGH ALTITUDE/HIGH AMBIENT TEMPERATURES. *TT
3048A2005-10-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SUPPLEMENT TO 03-06-01-024B 4.3L LU3 L35 TIMING CHAIN TENSIONER. RATTLE-TYPE NOISE COMING FROM THE ENGINE AT APPROXIMATELY 1800 TO 2200 RPMS. *TT
33042005-10-26. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. UPPER RADIATOR HOSE MAY HAVE A COOLANT LEAK, BECAUSE IT HAS RUBBED THROUGH ON THE FAN SHROUD. *TT
7022005-09-12. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. COOLANT LEAK FROM THE LOWER RADIATOR HOSE. *TT
0506040212005-05-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. REVISED INSPECTION/MAINTENANCE (I/M) EVAPORATIVE EMISSION (EVAP) SYSTEM SET PROCEDURE. *TT
32322005-05-11. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 1999 - 2005 GEN II COLD ENGINE MISFIRE AT IDLE WITH POSSIBLE P0171 AND/OR P0174. *TT
33752005-04-20. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. COOLANT LEAK FROM THE LOWER RADIATOR HOSE. *TT
0406030022005-03-11. Service bulletin. ENGINE AND ENGINE COOLING. DIAGNOSTIC INFORMATION FOR INTERMITTENT VEHICLE NO CRANK DEAD BATTERY. *EH
0406020022005-03-10. Service bulletin. ENGINE AND ENGINE COOLING. THROTTLE BODY COOLANT RETURN HOSE FALLING OUT OF CLIP. *EH
0406040282005-03-08. Service bulletin. ENGINE AND ENGINE COOLING. VARIOUS DRIVEABILITY CONCERNS CHECK ENGINE LIGHT ON DIAGNOSTIC TROUBLE CODE SET. *EH
0406040432005-02-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. UNABLE TO RESET ENGINE OIL LIFE MONITOR. *TT
0406010202005-02-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE OIL LEAK NEAR OIL FILTER. *TT
0406020082005-01-11. Service bulletin. ENGINE AND ENGINE COOLING. COOLANT LEAK AT CAP OF COOLANT RECOVERY RESERVOIR. *TT
32392004-12-04. Service bulletin. ENGINE AND ENGINE COOLING. LIGHT IS ON AND DIAGNOSTIC TROUBLE CODES P1125 AND P2125 SET. *EH
30562004-11-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. CHECK ENGINE LIGHT WITH A P0300 DUE TO 2-4 CYLINDERS MISFIRING ON THE SAME BANK OF THE ENGINE. *TT
30972004-11-05. Service bulletin. ENGINE AND ENGINE COOLING. OIL PAN OR OIL COOLER LINE LEAK. *SC
31032004-11-04. Service bulletin. ENGINE AND ENGINE COOLING. NO ENHANCED EVAP DATA LIST ON TECH ON TECH 2 *SC
30582004-10-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. GOODWRENCH ENGINE AND REPLACEMENT CRANKSHAFT INFORMATION. *TT
30552004-10-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON LIGHT WITH A P0300 MISFIRE DUE TO MISFIRES MAINLY ON CYLINDER 7. *TT
30382004-10-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE TICK, RATTLE OR KNOCK NOISE AFTER CYLINDER HEAD GASKET REPLACEMENT ON THE 6.0L ENGINE. *TT
30682004-10-08. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. OIL SEEPAGE FROM TURBO AIR CHARGE COOLER HOSES OR HOSE BLOWING OFF DURING ACCELERATION. POSSIBLE DIAGNOSTIC TROUBLE CODE P0299. *TT UPDATED 04-24-07. *KB
30882004-10-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. STALL WHILE DRIVING AT HIGH ALTITUDE. ALSO A CRANK, NO START, HARD START, LACK OF POWER OR ROUGH RUNNING CONDITION UNTIL THE VEHICLE COOLS DOWN. *TT
30482004-09-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS. TIMING CHAIN TENSIONER BREAKPOINTS FOR SERVICE KIT OR PRODUCTION KIT. SUPPLEMENT TO 03-06-01-024B. *TT

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