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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

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
30022004-08-23. Service bulletin. POWER TRAIN. 4L60E/4L65E INTERMITTENT NEUTRAL CONDITION WHILE ACCELERATING FROM A STOP OR WHILE DRIVING. *TT 1999-2006 GM CARS, LIGHT DUTY TRUCKS AND UTILITIES. *TT
0404210012004-08-03. Service bulletin. POWER TRAIN:DRIVELINE. DELAYED ENGAGEMENT OF FRONT WHEELS DURING A SLIP CONDITION. *MJ
018432004-07-19. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). CALIBRATION FOR IMPROVED TRANSFER CASE OPERATION IN AWD MODE. *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
021172004-06-23. Service bulletin. POWER TRAIN. TCCM WILL NOT PROGRAM THROUGH TIS. *MJ
015992004-06-04. Service bulletin. POWER TRAIN. 4L60E, 4L65E FORWARD AND LOW REVERSE WAVED STEEL CLUTCH PLATE APPEARANCE CHANGE. *TT
0307300562004-03-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 4L60-E AUTOMATIC TRANSMISSION OIL PUMP FIRST AND SECOND DESIGN IDENTIFICATION. *TT
007022004-03-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SLIP CONDITION IN 2ND, 3RD OR 4TH DAMAGED 2-4 BAND 3-4 CLUTCH ON THE 4L60E/4L65E AUTOMATIC TRANSMISSION. *TT *MJ
00822B2004-02-28. Service bulletin. POWER TRAIN. NO 2ND, NO 4TH AND NO REVERSE. TO INCLUDE 2004 LIGHT DUTY AUTOMOBILES AND TRUCKS EQUIPPED WITH 4L60E OR 4L65E AUTOMATIC TRANSMISSION. *TT
015732004-02-25. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. RATTLE NOISE AND/OR TRANSMISSION FLUID LEAK FROM TRANSMISSION COOLER LINE CONTACT WITH CATALYTIC CONVERTER. *TT *MJ
020421006C2003-12-04. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). INOPERATIVE 4WD/AWD LAMPS, INOPERATIVE 4WD/AWD SYSTEM. *TT
014102003-11-22. Service bulletin. POWER TRAIN. POOR PERFORMANCE FROM A STOP IN 2WD, AUTO OR 4WD HI. 2003, 2003 CADILLAC EXT ALSO INCLUDED. *TT
0619032003-10-29. Service bulletin. POWER TRAIN. UNUSUAL VIBRATION FELT AT IDLE OR AT VERY LOW RPM DURING PARKING LOT MANEUVERS. ALSO RESIDENCE NOISE ACCOMPANYING THE VIBRATION. *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
0313032003-07-25. Service bulletin. POWER TRAIN. 1-2 UPSHIFT DELAY CONDITION AT THROTTLE OPENINGS. *TT *JB
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
0304170022003-04-15. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. WHINE NOISE FROM REAR AXLE. *TT
020421008A2003-04-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SHUDDER, ROCKING MOTION, BINDING, FEELS LIKE VEHICLE IS TUCK IN 4WD WHEN TURNING AT LOW SPEEDS. *TT
0204190012003-03-27. Service bulletin. POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT. REVISED DIFFERENTIAL CARRIER ASSEMBLY REPLACEMENT. *TT
0204210082003-02-14. Service bulletin. POWER TRAIN. SHUDDER, ROCKING MOTION, BINDING, FEELS LIKE VEHICLE IS STUCK IN 4WD (CROW HOP) WHEN TURNING AT LOW SPEEDS. *TT
020421006A2003-02-14. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). INOPERATIVE 4WD/AWD LAMPS, INOPERATIVE 4WD/AWD SYSTEM. *TT
020730024A2002-10-11. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT. DIAGNOSIS OF CRACKED OR BROKEN TRANSMISSION CASE. *TT 2006 AND PRIOR CARS AND LIGHT DUTY TRUCKS. *TT
0204210062002-10-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT. SOME CUSTOMERS MAY COMMENT THAT THE 4WD/AWD INDICATOR LIGHTS ON THE SELECTOR SWITCH DO NOT WORK OR THE 4WD/AWD SYSTEM MAY BE INOPERATIVE. *TT

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