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Service bulletins for the 2003 Chevrolet Silverado

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.

1069 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
020132004-05-26. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. COOLANT LEAK FROM HEAD CUP PLUGS ON GEN III ENGINES. *MR
020292004-05-19. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; FUEL SYSTEM, GASOLINE. INACCURATE FUEL GAUGE READINGS AND/OR ENGINE STALL. *MR
040162004-05-19. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. EVAPORATIVE EMISSION SYSTEM DIAGNOSTIC DISABLED BY INCORRECT FUEL LEVEL REFERENCE. RECALL BULLETIN. *TT
100120032004-05-06. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. BLUEHEAT COOLANT HEATER THERMO TOP C. WEBASTO. *MR
01242A2004-04-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS. 6.6L LB7 LLY DIESEL ENGINE DRIVE BELT CHIRPING ON SHUT DOWN. SIT BULLETIN 1460352. *TT
017742004-04-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 6.6L LB7 REPEAT ENGINE OIL LEAK (LEFT SIDE) #2 MAIN BEARING CROSS BOLT. *MR
030605008B2004-03-04. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. ADVANCE SERVICE INFORMATION - EXHAUST SYSTEM POPPING/SNAPPING NOISE WHEN VEHICLE IS HOT, AT IDLE OR IMMEDIATELY AFTER VEHICLE IS SHUT OFF. *TT BULLETIN 03-06-05-008, DATED 11/01/2003 REPLACED. *TT
0306040622004-03-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. THIS BULLETIN IS BEING ISSUED TO REVISE STEP 4 OF DIAGNOSTIC TROUBLE CODE (DTC) P2135. *TT
001496A2004-03-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. THIS MESSAGE IS IN REGARD TO DURAMAX TURBOCHARGER NOISES OR POSSIBLY A PERFORMANCE OR FUEL ECONOMY COMPLAINT. SERVICE VME. 6.6 LB7 DIESEL ENGINE. P0102, P0103, P0236. *TT
014852004-03-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. TIMING CHAIN TENSIONER BREAKPOINTS FOR SERVICE KIT OR PRODUCTION FIX. RATTLE-TYPE NOISE COMING FROM THE ENGINE AT APPROXIMATELY 1800 TO 2200 RPMS. 4.3L LU3 L35 ENGINE. *TT
014842004-03-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. GEN III REPLACEMENT FLYWHEEL BOLT HOLES LARGER THAN ORIGINAL PART. THE BOLT HOLES FOR THE CRANK SHAFT IN THE REPLACEMENT FLYWHEEL ARE LARGER THAN THE HOLES IN THE ORIGINAL PART. SIT BULLETIN 1400596. *TT
014962004-03-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. 6.6L LB7 DURAMAX DIESEL TURBOCHARGER NOISES OR FUEL ECONOMY COMPLAINT. SERVICE VME. SIT BULLETIN 1401355. *TT
014992004-03-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 2004 6.6L DURAMAX LB7 ENGINES WITH EXTENDED CRANK DURING HOT ENGINE RESTART. DIAGNOSTIC TROUBLE CODE (DTC) P0193 MAY OR MAY NOT BE SET. SIT BULLETIN 1402202. *TT
00969A2004-02-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE WHISTLE NOISE. *TT
015122004-02-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. 6.6 LITER DURAMAX DIESEL ENGINE FUEL KNOCK NOISE. VARIOUS MODELS INCLUDING THE 2004 GMC C4500 AND C5500. SIT BULLETIN 1406247. *TT
01485A2004-02-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. TIMING CHAIN TENSIONER BREAKPOINTS FOR SERVICE KIT OR PRODUCTION FIX FOR VEHICLE EXHIBITING RATTLE-TYPE NOISE COMING FROM THE ENGINE AT APPROXIMATELY 1800 TO 2200 RPMS. SIT BULLETIN 1408407. *TT
030632004-02-24. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. 03063 - OBD SYSTEM SOFTWARE UPGRADE - ON-BOARD DIAGNOSTIC (OBD) SYSTEM SOFTWARE UPGRADE - DIAGNOSTIC TROUBLE CODE (DTC) P0128 ENGINE COOLANT TEMPERATURE BELOW THERMOSTAT REGULATING TEMPERATURE. *TT
0306040652004-02-11. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. LACK OF PASSENGER COMPARTMENT HEAT AND/OR RAISED/ROUGH IDLE AFTER START AND/OR P0128 DIAGNOSTIC TROUBLE CODE (DTC) STORED WITH NO SERVICE ENGINE SOON LIGHT ILLUMINATED. *TT
1009032004-01-22. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. DURAMAX DIESEL FUEL IN OIL DIAGNOSTICS REVISITED. GM VOICEMAIL LOG. THIS INCLUDES C4500 AND 5500 TRUCKS. *TT
1008032004-01-22. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. EXCESSIVE DURAMAX TURBOCHARGER WHINE NOISE OR POSSIBLY A PERFORMANCE OR A FUEL ECONOMY COMPLAINT. GM VOICEMAIL LOG. THIS INCLUDES 2003-2004 4500 AND 5500 TRUCKS. *TT
1008032004-01-22. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. THE ENGINE DIAGNOSTIC FUEL LEAKS INSIDE OF THE ENGINE. GM VOICEMAIL LOG. THIS INCLUDES 2000 - 2004 CHEVROAND GMC C4500 AND 5500 TRUCKS. *TT
0306040592004-01-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. REVISED FUEL LEAKS INSIDE OF ENGINE DIAGNOSTIC. 2004 CHEVROLET KODIAK AND GMC TOPKICK ALSO INCLUDED. *TT
020601022C2004-01-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. INFORMATION ON ENGINE TICKING. INCLUDING 2004 CHEVROLET KODIAK C45/C5500 SERIES AND 2004 GMC TOPKICK C4500/C5500 SERIES. *TT UPDATE. *TT
0306040602004-01-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. INFORMATION ON NEW SPARK PLUGS AND GAPPING. VARIOUS MODELS INCLUDING PONTIAC GTO 2004. *TT
0306040412003-12-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. POOR ENGINE PERFORMANCE - MISFIRE, ROUGH IDLE, SERVICE ENGINE SOON/CHECK ENGINE LIGHT ILLUMINATED, DIAGNOSTIC TROUBLE CODE (DTC) P0300 SET. *TT

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