WenmarOpen by Wenmar Pro

Service bulletins for the 2003 Chevrolet Blazer

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.

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

By type

By component

By trouble code

Bulletins, newest first
016412004-06-04. Service bulletin. ELECTRICAL SYSTEM. P0442 SETTING AFTER PERFORMING PI00622B. 2003 S/T CLASSIC VEHICLES BUILT PRIOR TO CERTAIN VIN RANGES ALSO INCLUDED. *MR
020152004-05-20. Service bulletin. SUSPENSION:FRONT. POP SNAP NOISE IN THE FRONT SUSPENSION WHEN BRAKING. *MR
020382004-05-20. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE B1000. *MR
018952004-05-14. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. 5SP MANUAL SHIFTER POPS OUT OF 2ND, 4TH, OR REVERSE GEARS. *TT
017272004-04-30. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 4.3 L35 LU3 RATTLE OR BUZZ NOISE FROM ENGINE. SIT BULLETIN 1457619. *TT
0308570052004-03-05. Service bulletin. STRUCTURE:BODY. WATER FOUND IN REAR CUPHOLDER OR ON FLOOR OF VEHICLE. *TT
0307300562004-03-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 4L60-E AUTOMATIC TRANSMISSION OIL PUMP FIRST AND SECOND DESIGN IDENTIFICATION. *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
007022004-03-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SLIP CONDITION IN 2ND, 3RD OR 4TH DAMAGED 2-4 BAND 3-4 CLUTCH ON THE 4L60E/4L65E AUTOMATIC TRANSMISSION. *TT *MJ
00822B2004-02-28. Service bulletin. POWER TRAIN. NO 2ND, NO 4TH AND NO REVERSE. TO INCLUDE 2004 LIGHT DUTY AUTOMOBILES AND TRUCKS EQUIPPED WITH 4L60E OR 4L65E AUTOMATIC TRANSMISSION. *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
01582A2004-02-25. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. HVAC MODE SWITCH IS INOPERATIVE OR IS STUCK IN VENT MODE. *MN
010730038B2004-02-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THE SERVICE ENGINE SOON LAMP IS ILLUMINATED, NO 3RD AND 4TH GEAR, THE TRANSMISSION DOES NOT SHIFT CORRECTLY, THE TRANSMISSION FEELS LIKE IT SHIFTS TO NEUTRAL OR A LOSS OF DRIVE OCCURS. *TT
030849014A2004-01-03. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM. FUEL GAUGE FLUCTUATES BETWEEN E AND 1/4 TANK, GOES FROM 1/4 TO EMPTY TOO QUICKLY, EXCESSIVE EMPTY FUEL RESERVE. *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
0306010242003-12-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. RATTLE NOISE IN ENGINE. *TT
0308480142003-12-03. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM. FUEL GAUGE FLUCTUATES BETWEEN E AND 1/4 TANK, GOES FROM 1/4 TO EMPTY TOO QUICKLY, EXCESSIVE EMPTY FUEL RESERVE. *TT
030601024A2003-12-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. RATTLE NOISE IN ENGINE. *TT
014242003-11-24. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. WATER LEAK FROM SUNROOF INTO HEADLINER. *TT
01136C2003-11-22. Service bulletin. STRUCTURE:FRAME AND MEMBERS:UNDERBODY SHIELDS. CLUNK NOISE FELT THROUGH FLOOR PAN. *TT
01273B2003-11-20. Service bulletin. SUSPENSION. VIBRATION AT HIGHWAY SPEEDS. *TT
013422003-11-19. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 4.3L LU3 ENGINE HOT SOAK HESITATION LOW POWER. *TT
0624032003-10-29. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. HEATING VENTILATION AND AIR CONDITIONING INOPERATIVE OR STUCK IN ANY MODE. DIAGNOSIS. *TT
0308670042003-09-30. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. PARTS AVAILABILITY FOR SUNROOF REPAIRS. *TT
0308490082003-09-29. Service bulletin. EQUIPMENT:ELECTRICAL. ERRATIC OR INACCURATE COMPASS OPERATION WITH USE OF POWER MOON ROOF. *TT UPDATE. *TT

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