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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
31722004-11-08. Service bulletin. ELECTRICAL SYSTEM. MULTIPLE ELECTRICAL CONCERNS AND DIAGNOSTIC TROUBLE CODE U1064. VARIOUS MODELS INCLUDING 2005 BUICK RAINIER AND 2005 CHEVROLET TRAILBLAZER. *TT
30952004-11-05. Service bulletin. VISIBILITY:GLASS, SIDE/REAR. OPERATION OF REAR GLASS RELEASE KEY CYLINDER. TO INCLUDE 2005 TRAILBLAZER AND BUICK RAINIER. *SC
3019A2004-11-05. Service bulletin. UNKNOWN OR OTHER. DIAGNOSTIC TROUBLE CODE P0171 . *SC SERVICE ENGINE SOON LIGHT DUE TO DIAGNOSTIC TROUBLE CODE P0171. *TT
31042004-11-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. ONLY REPLACEMENT OF EVAPORATOR CORE OR PIPES FOR REAR HVAC. (TO INCLUDE 2005 CHEVROLET TRAILBLAZER) *SC
3110A2004-11-05. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER; VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR. WASHER MOTOR FOR THE FRONT WIPERS CONTINUOUSLY RUNS WHILE THE KEY ON. *SC UPDATE. *TT
31422004-11-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. BROKEN HEAD BOLT REPAIR. *TC
31162004-11-05. Service bulletin. ELECTRICAL SYSTEM. ENGINE STALLS WHEN AIR CONDITIONING IS TURNED ON AT IDLE. (TO INCLUDE 2005 CHEVROLET TRAILBLAZER, 2005 OLDSMOBILE BRAVADA, AND BUICK RAINIER) *SC UPDATED 01-26-07. *KB
31242004-11-05. Service bulletin. SUSPENSION. UPPER AND LOWER INTERMEDIATE SHAFT PARTS RESTRICTION. *SC
04017A2004-11-05. Service bulletin. EXTERIOR LIGHTING:TAIL LIGHTS. TAIL LAMP/STOP LAMP(S) MAY BECOME INOPERATIVE. GM ADMINISTRATIVE MESSAGE. *NM
31352004-11-05. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE. CHMSL APPLIQUE CONTACTS ROOF WHEN OPENING REAR GATE/GLASS. (TO INCLUDE 2005 CHEVROLET TRAILBLAZER) (MT 370 ONLY) *SC
31382004-11-04. Service bulletin. ELECTRICAL SYSTEM. REDUCED POWER LIGHT ON AND DIAGNOSTIC TROUBLE CODE P1680 P1221 AND/OR P1271 STORED IN THE POWER CONTROL MODULE. *SC
31522004-11-03. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. BLOWER SPEED CHANGES ON ITS OWN. *TC UPDATE. *TT
31512004-11-03. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES:INTERIOR. INSIDE REAR VIEW MIRROR DOES NOT DISPLAY AMBIENT TEMPERATURE WITH CJ2 OPTION. *TC
30772004-10-15. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. TICK NOISE AT IDLE. *TT
30592004-10-14. Service bulletin. SUSPENSION:FRONT. RATTLE NOISE IN FRONT SUSPENSION OVER SMALL BUMPS, CLUNK OR LOOSE LUMBER TYPE NOISE OVER UNEVEN/WASH BOARD ROADS. *TT
30442004-10-14. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. LOCATION OF THE HEADLAMP DRIVER MODULE (HDM). *TT
30422004-10-14. Service bulletin. VEHICLE SPEED CONTROL:CRUISE CONTROL. CRUISE CONTROL DISENGAGES AFTER ACCELERATING. *TT
04017A2004-10-13. Service bulletin. EXTERIOR LIGHTING. TAIL LAMPS/STOP LAMPS. SPECIAL POLICY SERVICE BULLETIN. *TT
30762004-10-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. REPLACEMENT GOODWRENCH ENGINES - PARTS WHICH MUST BE SWAPPED FROM ORIGINAL ENGINE. *TT
3050A2004-10-13. Service bulletin. EQUIPMENT. 02-05 ONSTAR EQUIPPED VEHICLES EMITTING BEEPING NOISE BEFORE CONNECTING TO ONSTAR. *TT
30472004-10-08. Service bulletin. EQUIPMENT. 99 THROUGH 05 YEAR VEHICLES, EQUIPPED WITH THREE-BUTTON ONSTAR SYSTEMS. *TT
30762004-10-08. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. REPEAT HVAC BLOWER MOTOR FAILURE. *TT
010120042004-10-07. Service bulletin. ENGINE AND ENGINE COOLING. HIGH COOLANT TEMPERATURE GAUGE READINGS DURING LOW RPM OPERATION. *TT
110120022004-10-07. Service bulletin. EXTERIOR LIGHTING:TAIL LIGHTS. SERVICING THE REAR TAIL LAMP BULB OR SOCKET ASSEMBLY. *TT
30892004-10-04. Service bulletin. ELECTRICAL SYSTEM. SERVICE ENGINE SOON LIGHT AND REDUCED ENGINE POWER WITH A DIAGNOSTIC TROUBLE CODE P1516. DIAGNOSTIC TROUBLE CODES P0120, P0220, P1514, P1515, P1518 AND P2135 MAY ALSO BE PRESENT. *TT

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