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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
3110C2005-10-29. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER. WIPER/WASHER WILL NOT SHUT OFF OR OTHER POSSIBLE ISSUES. *TT
007732005-10-27. Service bulletin. POWER TRAIN. 4L60E, 4L65E REPLACEMENT VALVE BODY GASKETS DOES NOT SEEM TO FIT. *TT
33352005-10-27. Service bulletin. EXTERIOR LIGHTING:TAIL LIGHTS. SUPPLEMENT TO CAMPAIGN 04087 / SCREWS BREAK IN THE TAIL LAMP HOUSING. *SC
35772005-10-27. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY. NO CRANK NO START NO DIAGNOSTIC TROUBLE CODES. *TT
34052005-10-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE IS HARD TO START AFTER FILLING THE FUEL TANK. *TT
36562005-10-20. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:FAN/MOTOR. REPEAT REAR BLOWER MOTOR FAILURE OR INOPERATIVE. *TT UPDATED 12/5/08. *PE UPDATED 08/06/2012 *JS
3420A2005-10-20. Service bulletin. POWER TRAIN. PING, POP OR CLICK NOISE FROM UNDER THE REAR. *SC
36802005-09-21. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. AUTOMATIC HEADLAMP DEFEAT INOPERATIVE AFTER BCM REPLACEMENT. *TT
5102005-09-03. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. INTERMITTENT DEAD BATTERY. *SC
0508420012005-05-14. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. DIAGNOSTIC INFORMATION ON HEADLAMPS FLICKER OR MOMENTARILY DIM WHILE DRIVING. *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
0506040142005-05-13. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. DIAGNOSTIC AIDS FOR DIAGNOSTIC TROUBLE CODES P0440, P0455 AND/OR P0442 - EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK. *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
33512005-05-11. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). INTERMITTENT MALFUNCTION INDICATOR LAMP (MIL) WITH DIAGNOSTIC TROUBLE CODE (DTC) C0374 OR ERRATIC 4WD/AWD OPERATION. *TT
070120042005-04-29. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. OIL LIFE SYSTEM RESET PROCEDURES-TRUCKS. BUICK TERAZZA 2005, GMC SIERRA DENALI 2002-2003, GMC B7 CHASSIS MEDIUM DUTY 2003-2005 AND GMC 560 C-SERIES 2003-2005 *SC
040872005-04-27. Service bulletin. EXTERIOR LIGHTING:TAIL LIGHTS. TAIL LAMP THAT MAY BECOME INOPERATIVE PREMATURELY. *EH
33002005-04-21. Service bulletin. POWER TRAIN:DRIVELINE. 4WD MODELS WITH NOISE, VIBRATION ON DRY PAVEMENT. *EH
33732005-04-21. Service bulletin. AIR BAGS. SIR LIGHT ON STEADY AFTER BULB TEST AND NO DIAGNOSTIC TROUBLE CODES (DTCS). *TT
33512005-04-20. Service bulletin. SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER. HEATED SEAT OPERATION CLARIFICATION. *TT
3317A2005-04-20. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. HEADLAMPS FLICKER OR DIM WHILE DRIVING. *TT
0408460042005-04-19. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. ONSTAR SYSTEM INOPERATIVE ONSTAR SYSTEM STATUS LIGHT IS RED RADIO LOCKED IN PHONE MODE OR DTC B1000. *EH
0406040902005-04-19. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON (SES) LIGHT ON, DIAGNOSTIC TROUBLE CODE (DTC) P0483. *TT
3300C2005-04-18. Service bulletin. ELECTRICAL SYSTEM:HORN. APPLICATION OF HORN AT HORN PAD INOPERATIVE. RKE FUNCTION FOR PANIC ALARM WORKS. *TT
112020032005-04-13. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. RATTLE NOISE UNDERNEATH THE VEHICLE OR AN AUTOMATIC TRANSMISSION FLUID LEAK. *EH
050620042005-04-13. Service bulletin. ENGINE AND ENGINE COOLING. S ENGINE POSSIBLE FALSE CODE DTC P0172. *EH

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