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2003 Chevrolet TrailBlazer Technical Service Bulletins (TSBs)

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TSB Date Problem Area TSB Text
01/25/17 NHTSA ID: 10089488
TSB ID: 14423A

14423a - special coverage (revised part information). some 2004 model year buick rainier, 2003-2004 model year chevrolet ssr, 2002-2004 model year chevrolet trailblazer, chevrolet trailblazer ext, gmc envoy, gmc envoy xl, and oldsmobile bra
01/24/17 NHTSA ID: 10089419
TSB ID: 14423A

14423a - special coverage (revised part information). some 2004 model year buick rainier, 2003-2004 model year chevrolet ssr, 2002-2004 model year chevrolet trailblazer, chevrolet trailblazer ext, gmc envoy, gmc envoy xl, and oldsmobile bra
10/19/16 NHTSA ID: 10082869
TSB ID: PI1394A

This informational bulletin provides additional information on how to install pistons and suggest what tools to use.
10/18/16 NHTSA ID: 10082814
TSB ID: 000601012F

This informational bulletin provides information to gm dealers on the correct cleaning methods when cleaning engine gasket sealing surfaces.
09/12/16 NHTSA ID: 10079728
TSB ID: GCUS-9-1522

14423c - special coverage (revised service procedure). a fuel tank inlet check valve (icv) could fracture. the icv is located above the full fuel level. a fractured icv could allow fuel vapors to pass through and droplets of fuel to accu
09/12/16 NHTSA ID: 10079705
TSB ID: GCUS-9-1493

14423b - special coverage (revised part information and service procedure). a fuel tank inlet check valve (icv) could fracture. the icv is located above the full fuel level. a fractured icv could allow fuel vapors to pass through and dro
NHTSA's feed only includes summaries. For the full text of TSBs:

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11/04/08 NHTSA ID: 10026522
TSB ID: 07076

Buick\chevrolet\gmc\oldsmobile service campaign: see document search button for owner letter. special coverage adjustment - fuel tank modular reservoir assembly corrosion. csc letter was received. updated 11/6/08. updated 5
08/15/07 NHTSA ID: 10022470
TSB ID: 040525002

Abs light on, dtc's c0265, c0201, u1041 set and/or loss of communication with brake module. (reground ebcm ground).
04/19/05 NHTSA ID: 10013439
TSB ID: 040604090

Service engine soon (ses) light on, diagnostic trouble code (dtc) p0483.
03/11/05 NHTSA ID: 10012723
TSB ID: 040604076

Information on unstable/rough/lumpy engine idle, and low speed vehicle surge, random disturbance or vehicle shudder.
03/10/05 NHTSA ID: 10012694
TSB ID: 040232001

Release of steering gear stub shaft bearing kit for service. updated 08-15-07. updated 10/09/07. *nj
06/03/04 NHTSA ID: 10007188
TSB ID: 01676

4.2 4l60e engine cooling fan contacts shroud after replacing radiator. *mr
06/03/04 NHTSA ID: 10007212
TSB ID: 02023

Intermittent no crank no start. security light may be on or off. 4.2 ll8 engine. *nm
04/16/04 NHTSA ID: 10006115
TSB ID: 020526001B

Rear parking brake shoe retaining spring clip service kit for drum-in-hat (dih) equipped vehicles. update.
05/21/18 Electrical and Air Conditioning NHTSA ID: 10137458
TSB ID: 12-00-89-002A

This informational bulletin provides information for requesting a new key code for customers with lost or stolen keys
05/21/18 Electrical and Air Conditioning NHTSA ID: 10137476
TSB ID: 08-08-44-015C

This informational bulletin provides information regarding the inappropriate warranty claims submitted for damaged radios and instrument panel clusters, provides exampls on whats an acceptable for warranty and whats not
11/03/16 Electrical and Air Conditioning NHTSA ID: 10083898
TSB ID: PIT5485B

This preliminary information communication advises the technician if unable to place an onstar call in the ignition on mode after the onstar canada upgrade, to contact the gm technical assistance center onstar group for further assistance.
11/03/16 Electrical and Air Conditioning NHTSA ID: 10083884
TSB ID: PIT5389A

This preliminary information communication advises the technician on the steps for diagnosing the concern. the vehicle may be unable to connect to onstar using the white, blue or red onstar buttons.
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11/03/16 Electrical and Air Conditioning NHTSA ID: 10083900
TSB ID: PIT5485A

This preliminary information communication advises the technician, if unable to place an onstar call in the ignition on mode after the onstar canada upgrade to contact the gm technical assistance center onstar group for further assistance.
10/25/16 Electrical and Air Conditioning NHTSA ID: 10083509
TSB ID: PIC5088F

This preliminary information communication advises the technician on the steps to diagnose and repair the concern. the vehicle's xm radio only has xm preveiw channels.
10/25/16 Electrical and Air Conditioning NHTSA ID: 10083484
TSB ID: PIC4935E

This preliminary information communication provides information to help the dealership technicians perform a parasitic drain test for the onstar module. when performing battery parasitic drain test, there may be some confusion as to what th
10/25/16 Electrical and Air Conditioning NHTSA ID: 10083489
TSB ID: PIC5050A

This preliminary information communication advises the technician the steps on repairing the concern. a customer may identify a concern of unable to reactivate a vehicle's onstar that has been previously disabled by onstar. dealer is to ca
10/17/16 Electrical and Air Conditioning NHTSA ID: 10082506
TSB ID: 16NA260

This technical bulletin provides a procedure to reprogram the media disc player with the latest calibrations to correct a condition of the rear entertainment system not operating as intended in colder ambient temperature areas due to calibr
08/16/16 Electrical and Air Conditioning NHTSA ID: 10078734
TSB ID: PIC-5050-A

This preliminary information communication advises the technician the steps on repairing the concern. a customer may identify a concern of unable to reactivate a vehicle's onstar that has been previously disabled by onstar. dealer is to ca
NHTSA's feed only includes summaries. For the full text of TSBs:

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08/16/16 Electrical and Air Conditioning NHTSA ID: 10078735
TSB ID: PIC-4935-E

This preliminary information communication provides information to help the dealership technicians perform a parasitic drain test for the onstar module. when performing battery parasitic drain test, there may be some confusion as to what th
02/09/09 Electrical and Air Conditioning NHTSA ID: 10027804
TSB ID: 08089-B

General motors corp: special coverage adjustment; analog onstar deactivation. updated 2/17/09.
12/28/04 Electrical and Air Conditioning NHTSA ID: 10011074
TSB ID: 040845010

Various interior electrical concerns, ip gauges/lighting inoperative, hvac controls inoperative, blower motor inoperative, radio inoperative, flasher inoperative.
11/04/04 Electrical and Air Conditioning NHTSA ID: 10010181
TSB ID: 04017A

Tail lamp/stop lamp(s) may become inoperative. gm administrative message. *nm
11/03/04 Electrical and Air Conditioning NHTSA ID: 10009989
TSB ID: 3152

Blower speed changes on its own. *tc update.
05/04/04 Electrical and Air Conditioning NHTSA ID: 10006472
TSB ID: 01900

Under hood fuse block - 125 amp mega fuse blown. also including buick rainier 2002, 2003. *mr
NHTSA's feed only includes summaries. For the full text of TSBs:

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05/04/04 Electrical and Air Conditioning NHTSA ID: 10006474
TSB ID: 01899

Initialization and re-initialization of sunroof mdiv motor. also including 2003 buick rainier, and 2004 chevrolet trailblazer ext. *mr
05/21/18 Other NHTSA ID: 10137471
TSB ID: 12-03-10-002

This informational bulletin provides a description of the proper wheel installation and proper wheel torque techniques used to install wheels onto vehicles
03/16/17 Other NHTSA ID: 10095317
TSB ID: PIT3271G

This preliminary information communication provides information to the technician about changing the tire and wheel size on vehicles. general motors will only support a tire calibration for tires that have been sized, tested and designed fo
01/26/17 Other NHTSA ID: 10089561
TSB ID: 14423

14423 - special coverage. some vehicles contain a fuel tank inlet check valve (icv) that could fracture. the icv is located above the full fuel level. a fractured icv could allow fuel vapors to pass through and droplets of fuel to accumulat
02/06/12 Other NHTSA ID: 10042986
TSB ID: SB-10-08-50-003B

General motors: information provided by bulletin for all 2012 and prior general motor trucks and passenger vehicles regarding the adjustable comfort and custom upholstery of the driver and the passenger head restraint.
05/25/11 Other NHTSA ID: 10037570
TSB ID: PIT-3749D

Gm: on some truck models there is some frame corrosion. updated on 5/2/2012.
NHTSA's feed only includes summaries. For the full text of TSBs:

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12/19/08 Other NHTSA ID: 10026805
TSB ID: 08-089B

Buick\chevrolet\gmc service campaign: see document search button for owner letter. special coverage adjustment-analog onstar deactivation. csc letter was received.
11/09/06 Other NHTSA ID: 10020523
TSB ID: 060866011

Rear liftgate binds, improper fit. may be caused by broken welds or cracks formed around the two inner welds.
03/07/05 Other NHTSA ID: 10012578
TSB ID: 030866008

Perimeter seal/gasket pulls away from license plate housing and/or excessive adhesive around gasket.
11/03/04 Other NHTSA ID: 10009986
TSB ID: 3151

Inside rear view mirror does not display ambient temperature with cj2 option. *tc

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Chevrolet TrailBlazer TSBs (Technical Service Bulletins)

Some things are often misunderstood about recalls and technical service bulletins (TSBs). Plus a disclaimer.

  1. Recalls do not have to be issued only because something is prone to failure. NHTSA (a government agency) can only require a recall if a failure will affect safety, emissions, fuel economy, or compliance with some other regulation or law. Manufacturers can voluntarily recall cars for problems that do not affect these, though.
  2. Recalls often apply to only some cars of a specific model year, rather than all of them. You should receive a letter from the manufacturer if your car has been recalled. You can also check with the dealer, which will know which (if any) recalls pertain to your car.
  3. The primary purpose of TSBs is to inform dealers about known problems with a car and how to fix them. They are not the same as recalls. As with recalls, TSBs often only apply to some cars, not the entire model year.
  4. Dealers often will not provide a preventive repair just because a problem described in a TSB might happen to your car. They'll usually want to observe symptoms that the problem is already affecting your car.
  5. Even if there are symptoms, a manufacturer doesn't have to pick up the cost of a TSB repair if the car is out of warranty, though sometimes they do.

We provide the text of recalls and TSBs as provided by NHTSA. There can be errors in the text. If you sign up for notifications in My Garage, we will try to get these to do, but for various reasons (some beyond our control) cannot guarantee you will receive them. When in doubt about a recall or TSB, contact the dealer.