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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
018432004-07-19. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). CALIBRATION FOR IMPROVED TRANSFER CASE OPERATION IN AWD MODE. *TT
013532004-07-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE MISFIRE DUE TO INJECTOR FRETTING CORROSION. *TT
017182004-07-16. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY. STARTER CLICKS - NO CRANK CONDITION. *TT
02064A2004-07-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. A DIM SERVICE ENGINE SOON (SES) LIGHT MAY BE NOTED WITH THE IGNITION KEY IN THE ACCESSORY POSITION. *TT
021292004-07-12. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ROUGH IDLE OR IDLE SHAKE AT TIMES. *TT
021402004-07-12. Service bulletin. ELECTRICAL SYSTEM:IGNITION:SWITCH. WHEN ATTEMPTING TO TURN THE KEY TO START THE VEHICLE, YOU MAY EXPERIENCE HARD OR INTERMITTENT MECHANICAL BINDING IN THE IGNITION CYLINDER. *TT
020862004-07-12. Service bulletin. POWER TRAIN. 4L60E, 4L65E INTERMITTENT NEUTRAL FROM A STOP OR STEADY SPEED. *TT
020302004-07-09. Service bulletin. POWER TRAIN. PING, POP OR CLICK NOISE FROM THE PROPELLER SHAFT. SERVICE VME. *TT
020532004-07-09. Service bulletin. SERVICE BRAKES, HYDRAULIC. INFORMATION ON RESURFACING THE PARK BRAKE PORTION OF THE REAR BRAKE ROTOR. *TT
00156A2004-07-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 4.2L LL8 ENGINE ROUGH IDLE - RUN POSSIBLE P1345 OR P0016. *MJ *TT
00731A2004-07-02. Service bulletin. STRUCTURE:BODY. NOISE FROM FRONT OF VEHICLE OVER BUMPS OR UNDER LIGHT ACCELERATION. *TT
010162004-07-01. Service bulletin. ELECTRICAL SYSTEM. ANTI-LOCK BRAKE SYSTEM (ABS) LIGHT ON, RED BRAKE LIGHT ON, SERVICE 4WD LIGHT ON, HVAC BLOWER MOTOR INOPERATIVE. *TT
01078E2004-07-01. Service bulletin. STRUCTURE. NOISE FROM INSTRUMENT PANEL CLUSTER TACHOMETER. *TT
01181C2004-06-30. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE (DTC) P0172. 4.2 LL8 ENGINE. *TT *MJ
021172004-06-23. Service bulletin. POWER TRAIN. TCCM WILL NOT PROGRAM THROUGH TIS. *MJ
040172004-06-22. Service bulletin. EXTERIOR LIGHTING:TAIL LIGHTS. SPECIAL POLICY ADJUSTMENT - TAIL LAMP/STOP LAMP INOPERATIVE. ANSWERS TO ASSIST IN RESPONDING TO CUSTOMER INQUIRIES. *MJ THIS IS THE FIRST PHASE WHICH WAS RELEASED JUNE 3, 2004. *TT THIS IS THE SECOND PHASE - PHASE II. *TT PHASE III. *TT
00686B2004-06-09. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. AUTOMATIC VOLUME FEATURE DIAGNOSIS ON THE UQA BOSE RADIO. *TT
00949C2004-06-09. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE:HINGE AND ATTACHMENTS. THE LIFTGATE OR LIFTGATE GLASS BINDS WHEN OPENING OR DOES NOT OPEN COMPLETELY BECAUSE THE CENTER HIGH MOUNTED STOP LAMP (CHMSL) APPLIQUE HITS THE ROOF OF THE VEHICLE. *TT
00372D2004-06-09. Service bulletin. EQUIPMENT:ELECTRICAL. ONSTAR SYSTEM IS ATTEMPTING AND/OR COMPLETING PHONE CALLS WHICH THE OPERATOR OF THE VEHICLE DID NOT INITIATE. *TT
008592004-06-09. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE (DTC) C0327 WITH OR WITHOUT ADDITIONAL DIAGNOSTIC TROUBLE CODES (DTCS) SETTING. *TT *MJ
01968A2004-06-09. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE (DTC) P0171. *TT
01115A2004-06-09. Service bulletin. SUSPENSION. CLUNK, RATTLE NOISE FROM FRONT OF VEHICLE OVER BUMPS. *TT
016722004-06-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL PAN DRAIN PLUG THREADS - INFORMATION. *TT
015992004-06-04. Service bulletin. POWER TRAIN. 4L60E, 4L65E FORWARD AND LOW REVERSE WAVED STEEL CLUTCH PLATE APPEARANCE CHANGE. *TT
020232004-06-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. INTERMITTENT NO CRANK NO START. SECURITY LIGHT MAY BE ON OR OFF. 4.2 LL8 ENGINE. *NM

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