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Service bulletins for the 2003 Chevrolet Trailblazer

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.

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

By type

By component

By trouble code

Bulletins, newest first
30862004-10-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. WHISTLE NOISE FROM THE THROTTLE BODY AREA ON LIGHT THROTTLE ACCELERATION ON VEHICLES WITH GEN III ENGINES AND ELECTRONIC THROTTLE. *TT
090520022004-09-30. Service bulletin. STRUCTURE:BODY. TAPPING NOISE AND INSTALLATION CONCERNS WITH THE MOLDED HOOD PROTECTOR. *TT
091320022004-09-30. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). THIS MESSAGE COVERS COMMENTS THAT THE SERVICE FOUR-WHEEL DRIVE INDICATOR IS ILLUMINATED OR FOUR-WHEEL DRIVE IS INOPERABLE. *TT
30432004-09-28. Service bulletin. FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP. FUEL SPLASH FROM FILLER NECK AFTER FILLING TANK AFTER 04-06-04-003. *TT
3046A2004-09-27. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM. FUEL GAUGE FLUCTUATION IN PARK OR NEUTRAL. *TT
30412004-09-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON LIGHT AND / OR REDUCED ENGINE POWER MODE DUE TO DIAGNOSTIC TROUBLE CODES P0120, P0220, P1516 AND/OR P1518. THIS CONDITION IS NORMALLY VERY INTERMITTENT. *TT
30642004-09-27. Service bulletin. SERVICE BRAKES, HYDRAULIC. FRONT BRAKE NOISE OR SQUEALING ON THE FIRST FEW LIGHT BRAKE APPLIES AFTER THE VEHICLE HAS SAT FOR A LONG PERIOD OF TIME, SUCH AS OVERNIGHT. THIS MESSAGE APPLIES TO THE LONG WHEEL BASE MODEL. SERVICE VME. *TT
30112004-08-25. Service bulletin. EQUIPMENT. WHEN USING VOICE RECOGNITION DIALING, SOME NUMBERS OR COMMANDS MAY NOT BE UNDERSTOOD BY THE SYSTEM ESPECIALLY THE NUMBER TWO (2). *TT
15281022004-08-24. Service bulletin. ELECTRICAL SYSTEM. 02-04 4.2L LL8 DIAGNOSTIC TROUBLE CODE P0171. *MJ
30182004-08-23. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE CYLINDER HEAD CUP PLUG COOLANT LEAK. *MJ
30022004-08-23. Service bulletin. POWER TRAIN. 4L60E/4L65E INTERMITTENT NEUTRAL CONDITION WHILE ACCELERATING FROM A STOP OR WHILE DRIVING. *TT 1999-2006 GM CARS, LIGHT DUTY TRUCKS AND UTILITIES. *TT
30162004-08-23. Service bulletin. ELECTRICAL SYSTEM. VARIOUS ELECTRICAL CONCERNS. *TT
15310182004-08-23. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. HVAC MODE ACTUATOR CAM GEAR ALIGNMENT IS INCORRECT AFTER REPLACEMENT. *MJ
30312004-08-23. Service bulletin. ELECTRICAL SYSTEM. INTERMITTENT P0483 DIAGNOSTIC TROUBLE CODE. *TT
0406030052004-08-13. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE. PROPER CONNECTION INFORMATION TO AVOID BLOWN 125 AMP FUSE AND VARIOUS INTERIOR ELECTRICAL SYSTEM CONDITIONS WHEN JUMP STARTING VEHICLE. *TT
0406010032004-08-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. INFORMATION ON 2ND DESIGN BALANCER HUB. *TT
040525002B2004-08-13. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE. ANTI-LOCK BRAKE SYSTEM (ABS) LIGHT ON, DIAGNOSTIC TROUBLE CODES (DTCS) C0265, C0201, U1041 SET AND/OR LOSS OF COMMUNICATION WITH BRAKE MODULE. *TT UPDATE. *TT
0401390022004-08-12. Service bulletin. EQUIPMENT:ELECTRICAL. POOR HEATER PERFORMANCE - 2ND AND 3RD ROW SEATS. *TT
092420022004-08-10. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR. OUTSIDE MIRRORS DO NOT RETURN TO THE ORIGINAL POSITION AFTER USING THE REVERSE TILT CURB ASSIST FEATURE. *TT
110820022004-08-10. Service bulletin. POWER TRAIN. SHUTTER CONCERN DURING LOW SPEED TURNING MANEUVERS FOR ALL-WHEEL DRIVE VEHICLES. *TT
0404210012004-08-03. Service bulletin. POWER TRAIN:DRIVELINE. DELAYED ENGAGEMENT OF FRONT WHEELS DURING A SLIP CONDITION. *MJ
0406010152004-08-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. NEW DESIGN OIL PICK UP TUBE AND FRONT COVER. *MJ
040843005B2004-08-03. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR. WINDSHIELD WIPER MOTOR MODULE ASSEMBLIES. *MJ
00877A2004-07-19. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER. INTERMITTENT LACK OF HEAT IN 2ND AND 3RD ROW SEATING POSITIONS. *TT
01802A2004-07-19. Service bulletin. ELECTRICAL SYSTEM. APP SENSOR 2 AND/OR TP SENSOR 2 SIGNAL CIRCUIT VOLTAGES DROP. *TT

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