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Service bulletins for the 2002 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.

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

By type

By component

By trouble code

Bulletins, newest first
0523032003-10-28. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. AIR CONDITIONER LOW PRESSURE CYCLING SWITCH INTERMITTENTLY INOPERATIVE OR STUCK OPEN/ INTERMITTENT AIR CONDITIONER OPERATION AND/OR LOSS OF COLD AIR. *TT
0522032003-10-28. Service bulletin. ELECTRICAL SYSTEM. INTERMITTENT CONDITION AT VEHICLE START UP IN WHICH THE INSTRUMENT PANEL CLUSTER MAY NOT POWER UP RESULTING IN MOST OF THE DISPLAYS, TELLTALE LIGHTS AND FUNCTIONS BEING INOPERATIVE. DEALERS ARE TO REPROGRAM THE INSTRUMENT CLUSTER SOFTWARE. *TT
0522032003-10-28. Service bulletin. POWER TRAIN. PRODUCT FIELD ACTION 03012. VEHICLES ARE EQUIPPED WITH A MECHANICAL OVERRIDE THAT COULD ALLOW THE IGNITION KEY TO BE REMOVED WITH THE SHIFT LEVER IN A POSITION OTHER THAN PARK. IN ADDITION, THESE VEHICLES HAVE AN OVERRIDE THAT CAN ALLOW THE TRANSMISSION TO BE SHIFTED OUT OF PARK WITH THE IGNITION IN THE OFF POSITION. *TT
030192003-10-18. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SPECIAL POLICY ADJUSTMENT 03019 - 4.2L BORE LINER CRACKING RESULTING IN ENGINE NOISE, POOR PERFORMANCE, AND/OR STALLS WITH NO ENGINE RESTART. *TT
0306040342003-10-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON LIGHT ON, DIAGNOSTIC TROUBLE CODE P0135 SET. *TT
0308670042003-09-30. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. PARTS AVAILABILITY FOR SUNROOF REPAIRS. *TT
0308660062003-09-30. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE. LIFT GATE GLASS HARD TO CLOSE. *TT
0308420062003-09-29. Service bulletin. EXTERIOR LIGHTING:TAIL LIGHTS:SWITCH. TAIL LAMP CIRCUIT BOARD NOW AVAILABLE FOR SERVICE USE. *TT
010846002C2003-09-26. Service bulletin. EQUIPMENT. PROGRAMMING OF REPLACEMENT ONSTAR VEHICLE COMMUNICATION AND INTERFACE MODULES (VCIM). *TT
1213022003-09-13. Service bulletin. EQUIPMENT:ELECTRICAL. ERROR MESSAGES WHEN PROGRAMMING A NEW MODULE. *TT
1209022003-09-12. Service bulletin. STRUCTURE:BODY. BUZZ OR RATTLE NOISE COMING FROM THE FRONT END OF LIGHT ACCELREATION AT 25 TO 45 MILES PER HOUR OR OVER BUMPS. *TT
0308420042003-08-27. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH. HEADLAMP LOW BEAM BULB SOCKET NOW AVAILABLE FOR SERVICE USE. *TT
020139006A2003-08-26. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. DIAGNOSING POOR AIR CONDITIONER PERFORMANCE - AIR CONDITIONER STOPS BLOWING COLD, AIR CONDITIONER CYCLES ON AND OFF. *TT
0306040302003-08-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MULTIPLE DRIVEABILITY SYMPTOMS OF LONG OR HARD STARTS, CHUGGLE, ROUGH IDLE AND LIGHT OR INTERMITTENT MISFIRE DUE TO CLOGGED FUEL INJECTORS. *TT
0301390072003-08-14. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. AIR CONDITIONING (A/C) INOPERATIVE / INTERMITTENT, AIR CONDITIONER BLOWS WARM AIR. *TT
0313032003-07-25. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. UNABLE TO DISABLE THE DAYTIME RUNNING LAMP FEATURE WHEN FOLLOWING THE PROCEDURE IN THE OWNER'S MANUAL. *TT *JB
0313032003-07-25. Service bulletin. POWER TRAIN. 1-2 UPSHIFT DELAY CONDITION AT THROTTLE OPENINGS. *TT *JB
0313032003-07-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. IDLE FLUCTUATION AND/OR HESITATION ON ACCELERATION. *TT *JB
0310032003-07-25. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE. THE LIFT GATE, OR LIFT GATE GLASS, BINDS WHEN OPENING OR DOES NOT OPEN COMPLETELY BECAUSE OF CENTER HIGH MOUNTED STOP LAMP OR CHIMSEL APPLIQUE HITS THE ROOF OF THE VEHICLE. *TT *JB
030132003-06-26. Service bulletin. ELECTRICAL SYSTEM. INSTRUMENT PANEL CLUSTER GAUGES INOPERATIVE. *TT
020235006A2003-04-25. Service bulletin. STEERING. SQUEAK, RUB / SCRUB TYPE NOISE IN STEERING COLUMN. *TT
0306040182003-04-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. COLD IDLE FLUCTUATION AT ALTITUDE, HESITATION ON ACCELERATION OR 1-2 UPSHIFT DELAY. *TT
0308640062003-04-25. Service bulletin. STRUCTURE:BODY:DOOR. DOORS HARD TO CLOSE. *TT UPDATED 07-24-07. *KB
020421002A2003-04-17. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). SERVICE 4WD INDICATOR ILLUMINATED, DIAGNOSTIC TROUBLE CODE (DTC) B2725 SET, TRANSFER CASE SELECTOR SWITCH IS IN ONE POSITION - INDICATOR LAMP INDICATES ANOTHER RANGE IS SELECTED. *TT
0304190022003-04-15. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. SQUEAK, SQUEAL OR WHISTLE NOISE FROM FRONT AXLE. *TT

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