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Service bulletins for the 2004 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.

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

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Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
31792004-11-08. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. AUTOMATIC DUAL ZONE HVAC BATTERY DRAW SUPPLEMENT TO 02-01-39-007A. *TT
30902004-11-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). UNABLE TO PERFORM SET UP NEW ONSTAR ON VEHICLES WITH GEN 6.05 HARDWARE. *SC
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
31132004-11-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). GEN 6 VEHICLES IN MOUNT AIRY, NC CANNOT CONNECT TO ONSTAR OR EMERGENCY SERVICES. *SC
31062004-11-04. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. XM RADIO WAS WORKING PRIOR TO JULY 26, 2004 AND IT IS INOPERATIVE NOW. *JB
31202004-11-04. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). ONSTAR CENTER UNABLE TO PERFORM REMOTE DIAGNOSTIC. (2004-2005 CHEVROLET YUKON, 2005 CHEVROLET TRAILBLAZER, 2002, 2003, 2005 BUICK RAINIER, 2005 CHEVROLET EXPRESS VAN, AND 2005 CADILLAC SEVILLE) *SC
31522004-11-03. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. BLOWER SPEED CHANGES ON ITS OWN. *TC UPDATE. *TT
31502004-11-03. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. MISSING CODES FROM CD CHANGER. *TC
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
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
15310182004-08-23. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. HVAC MODE ACTUATOR CAM GEAR ALIGNMENT IS INCORRECT AFTER REPLACEMENT. *MJ
0401390022004-08-12. Service bulletin. EQUIPMENT:ELECTRICAL. POOR HEATER PERFORMANCE - 2ND AND 3RD ROW SEATS. *TT
0401380052004-08-12. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. HVAC CONTROL MODULE MEMORY FUNCTIONS - ELIMINATION OF CLIMATE CONTROL PERSONALIZATION FEATURE. *TT
020602004-07-09. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. NO AUDIO AND RADIO DISPLAY INOPERATIVE OR CLOCK RESETS. *TT
020442004-07-09. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. NO SOUND FROM RADIO OR RADIO WILL NOT PROGRAM. *TT
00686B2004-06-09. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. AUTOMATIC VOLUME FEATURE DIAGNOSIS ON THE UQA BOSE RADIO. *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
016622004-06-04. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. XM ERROR ON A RADIO DISPLAY. *TT
016612004-06-04. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). XM CHANNEL ZERO NOT AVAILABLE ON CERTAIN VEHICLES EQUIPPED WITH NAVIGATION STYLE RADIOS. ALSO INCLUDING GMC DENALI 2004. *TT
019582004-05-20. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. PRODUCT INFORMATION REGARDING RADIO PERSONALIZATION. *MR
017992004-04-28. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. NO VOLUME FROM RADIO IN COLD AMBIENT TEMPERATURES FOR 20-30 MINUTES. *MR
017592004-04-28. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. XM RAPID ACTIVATION UTILIZATION. *MR
015772004-02-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. RADIO DISPLAYS CALIBRATION ERROR AFTER REPLACING RADIO. *MN

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