2003 Chevrolet Trailblazer Ext service bulletins & manufacturer communications

117 manufacturer communications are on file with NHTSA for the 2003 Chevrolet Trailblazer Ext. TSBs are repair guidance for dealers — they are not recalls, and repairs are not automatically free.

• This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
  PIP5601C · Technical service bulletin · Unknown OR Other · issued Jul 18, 2025
• 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 calibr…
  PIT3271P · Technical service bulletin · Unknown OR Other · issued Sep 6, 2024
• Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which mo…
  General Communication · Service campaign · Electrical System · issued Aug 26, 2024
• GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inad…
  24-NA-141 · Technical service bulletin · Power Train · issued Jul 24, 2024
• This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or mi…
  16-NA-383 · Technical service bulletin · Engine · issued Jun 28, 2024
• This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
  18-NA-099 · Technical service bulletin · Unknown OR Other · issued Jun 17, 2024
• This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4…
  24-NA-098 · Technical service bulletin · Electrical System · issued Jun 6, 2024
• This Warranty Administration bulletin provides retail and wholesale service personnel with the policies/procedures and the warranty transaction submission procedures that support t…
  09-00-89-008G · Technical service bulletin · Unknown OR Other · issued May 7, 2024
• This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
  10-08-45-001H · Technical service bulletin · Electrical System · issued Mar 28, 2024
• This bulletin advises the technician of possible location of an internal coolant leak from a specific cylinder head and location.
  06-06-01-019C · Technical service bulletin · Engine and Engine Cooling · issued Mar 14, 2024
• This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or …
  16-NA-383 · Technical service bulletin · Engine and Engine Cooling · issued Mar 13, 2024
• This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts …
  22-NA-074 · Technical service bulletin · Engine and Engine Cooling · issued Feb 22, 2024
• This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
  18-NA-099 · Technical service bulletin · Equipment · issued Jan 16, 2024
• This PI bulletin advises the technician on the proper way to install the pistons in an engine.
  PI1394B · Technical service bulletin · Engine and Engine Cooling · issued Jan 12, 2024
• This informational bulletin provides information for dealers/technicians on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage.
  02-08-42-001J · Technical service bulletin · Exterior Lighting · issued Jan 12, 2024
• This service bulletin provides information on Concerns or Questions Regarding Installation of Dealer Installed Accessories.
  23-NA-219 · Technical service bulletin · Equipment · issued Dec 12, 2023
• This service bulletin provides information about the Hunter wheel Road Force balancers that should be utilized for all repairs requiring balance and Road Force measurement.
  17-NA-170 · Technical service bulletin · Wheels · issued Oct 6, 2023
• This service bulletin provides information for dealers on how to submit a product information report (PIR) (Canada Only).
  10-00-89-006J · Technical service bulletin · Equipment · issued Sep 26, 2023
• This informational bulletin provides information for the IPC odometer programming method quick reference guide.
  07-08-49-020R · Technical service bulletin · Electrical System · issued Sep 21, 2023
• The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer…
  23-NA-153 · Technical service bulletin · Engine and Engine Cooling · issued Sep 1, 2023
• This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and pre…
  18-NA-073 · Technical service bulletin · Engine and Engine Cooling · issued Aug 24, 2023
• This service bulletin provides information about the Hunter wheel Road Force balancers that should be utilized for all repairs requiring balance and Road Force measurement.
  17-NA-170 · Technical service bulletin · Wheels · issued Apr 27, 2023
• This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
  19-NA-219 · Technical service bulletin · Engine and Engine Cooling · issued Apr 24, 2023
• This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
  19-NA-219 · Technical service bulletin · Engine and Engine Cooling · issued Mar 23, 2023
• This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
  22-NA-009 · Technical service bulletin · Engine and Engine Cooling · issued Mar 17, 2023
• This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
  17-NA-073 · Technical service bulletin · Equipment · issued Feb 21, 2023
• This service bulletin provides information for dealers/technicians on Exterior Lamp Condensation and Water Leaks and Replacement Guidelines.
  01-08-42-001O · Technical service bulletin · Exterior Lighting · issued Feb 15, 2023
• This Warranty Administration bulletin provides retail and wholesale service personnel with the policies/procedures and the warranty transaction submission procedures that support t…
  09-00-89-008F · Technical service bulletin · Equipment · issued Dec 21, 2022
• This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P04…
  21-NA-124 · Technical service bulletin · Engine and Engine Cooling · issued Dec 14, 2022
• 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 calibr…
  PIT3271N · Technical service bulletin · Tires · issued Nov 29, 2022
• This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts …
  22-NA-074 · Technical service bulletin · Engine and Engine Cooling · issued Nov 9, 2022
• This service bulletin provides information on Module Harvesting.
  22-NA-205 · Technical service bulletin · Electrical System · issued Oct 19, 2022
• This Preliminary Information communication provides information to the technician that the Cam gear alignment can be incorrect after replacing the HVAC mode actuator.
  PIT3033B · Technical service bulletin · Engine and Engine Cooling · issued Oct 18, 2022
• This service bulletin provides information for dealers on how to submit a product information report (PIR) (Canada Only).
  10-00-89-006I · Technical service bulletin · Equipment · issued Oct 7, 2022
• This service bulletin provides information on Handling Requests for Modifications to Permanently Import/Export Vehicles Between the U.S. and Canada.
  22-NA-195 · Technical service bulletin · Equipment · issued Sep 28, 2022
• This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification.
  06-00-89-031H · Technical service bulletin · Power Train · issued Sep 16, 2022
• This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
  22-NA-009 · Technical service bulletin · Engine and Engine Cooling · issued Sep 14, 2022
• This diagnostic tip advises the tech not to separate the flexplate from the torque convertor or damage my occur if the engine is started while diagnosing for noise from the engine …
  22-NA-181 · Technical service bulletin · Power Train · issued Sep 1, 2022
• This bulletin provides information on tools available to find an intake vacuum leak or exhaust leak to correct a condition of MIL Illuminated with Multiple Fuel Trim and/or Oxygen …
  20-NA-065 · Technical service bulletin · Engine and Engine Cooling · issued Aug 15, 2022
• This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
  22-NA-009 · Technical service bulletin · Engine and Engine Cooling · issued Jun 15, 2022
• This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
  18-NA-099 · Technical service bulletin · Equipment · issued May 16, 2022
• This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
  12-00-89-003B · Technical service bulletin · Equipment · issued May 2, 2022
• This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts …
  22-NA-074 · Technical service bulletin · Engine and Engine Cooling · issued Mar 31, 2022
• This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
  22-NA-009 · Technical service bulletin · Engine and Engine Cooling · issued Mar 22, 2022
• 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 calibr…
  PIT3271M · Technical service bulletin · Wheels · issued Mar 7, 2022
• 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 calibr…
  PIT3271K · Technical service bulletin · Wheels · issued Nov 11, 2020
• This Preliminary information communicates information to Clean the throttle body if the engine stalls at idle when the A/C comes on.
  PIT3116B · Technical service bulletin · Engine and Engine Cooling · issued May 13, 2020
• This informational bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank…
  16NA383 · Technical service bulletin · Fuel System, Gasoline · issued Jan 2, 2020
• This Preliminary information communicates diagnostic information for a front noise.
  PIT4297A · Technical service bulletin · Engine and Engine Cooling · issued Dec 11, 2019
• This Preliminary information communicates information for setting up the SDM.
  PIT3254B · Technical service bulletin · Electrical System · issued Nov 20, 2019
• This Preliminary information communicates rear HVAC blower operation and diagnostic.
  PIT3712A · Technical service bulletin · Equipment · issued Sep 3, 2019
• This Preliminary information communicates the normal operation of the CJ2 automatic HVAC system
  PIT4204A · Technical service bulletin · Equipment · issued Aug 28, 2019
• Information Regarding the Differences Between Fluid Leakage and Seepage This bulletin is intended to help identify the differences between what is considered a fluid leak and what …
  150089004B · Technical service bulletin · Suspension · issued Oct 1, 2017
• IPC Odometer Programming Method Quick Reference Guide
  070849020M · Technical service bulletin · Electrical System · issued Oct 1, 2017
• This informational bulletin provides additional information on how to install pistons and suggest what tools to use.
  PI1394A · Technical service bulletin · Engine · issued Aug 29, 2016
• 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 a…
  16NA260 · Technical service bulletin · Equipment · issued Aug 26, 2016
• This informational bulletin provides information to gm dealers on the correct cleaning methods when cleaning engine gasket sealing surfaces.
  000601012F · Technical service bulletin · Engine · issued Aug 2, 2016
• 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 techn…
  PIT5485B · Technical service bulletin · Equipment · issued Apr 27, 2016
• 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.
  PIC5088F · Technical service bulletin · Equipment · issued Apr 21, 2016
• 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 r…
  PIT5389A · Technical service bulletin · Equipment · issued Apr 19, 2016
• 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 t…
  PIC5050A · Technical service bulletin · Equipment · issued Apr 19, 2016
• This preliminary information communication provides information to help the dealership technicians perform a parasitic drain test for the onstar module. When performing battery par…
  PIC4935E · Technical service bulletin · Electrical System · issued Apr 19, 2016
• This preliminary information communication provides information to help the dealership technicians perform a parasitic drain test for the onstar module. When performing battery par…
  PIC-4935-E · Technical service bulletin · Electrical System · issued Apr 19, 2016
• 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 t…
  PIC-5050-A · Technical service bulletin · Electrical System · issued Apr 19, 2016
• 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 techn…
  PIT5485A · Technical service bulletin · Electrical System · issued Apr 8, 2016
• 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…
  GCUS-9-1522 · Technical service bulletin · Fuel System, Other · issued Jan 15, 2016
• 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 frac…
  GCUS-9-1493 · Technical service bulletin · Fuel System, Other · issued Jan 12, 2016
• Special Coverage Adjustment ? Fuel Tank Inlet Check Valve Fracture
  14423C · Technical service bulletin · Fuel System, Gasoline · issued Jan 1, 2016
• Special Coverage Adjustment ? Fuel Tank Inlet Check Valve Fracture
  14423B · Technical service bulletin · Fuel System, Gasoline · issued Jan 1, 2016
• 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 …
  14423A · Technical service bulletin · Fuel System, Other · issued Dec 14, 2015
• 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 …
  14423A · Technical service bulletin · Fuel System, Other · issued Dec 14, 2015
• Special Coverage Adjustment Fuel Tank Inlet Check Valve Fracture
  14423A · Technical service bulletin · Fuel System, Gasoline · issued Dec 1, 2015
• OnStar Voice Fallback Number Update
  15-NA-079 · Technical service bulletin · Communication · issued Dec 1, 2015
• OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
  06-00-89-031D · Technical service bulletin · Power Train · issued Dec 1, 2015
• OnStar® Voice Fallback Number Update Some customers may have received a letter from OnStar® stating that "We recently tried to provide a software update to the OnStar® hardware in …
  15-NA-079 · Technical service bulletin · Electrical System · issued Dec 1, 2015
• OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
  06-00-89-031D · Technical service bulletin · Engine · issued Dec 1, 2015
• 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 f…
  14423 · Technical service bulletin · Fuel System, Gasoline · issued Nov 2, 2015
• 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 calibr…
  PIT3271G · Technical service bulletin · Equipment · issued Jan 15, 2015
• XM Audio Traffic And Travel Link Availability And Operation.
  PIT5353 · Technical service bulletin · Equipment · issued Nov 1, 2014
• Canadian Customers Unable To Place Calls And Turn By Turn Inoperative In The United States.
  PIT5264B · Technical service bulletin · Equipment · issued Nov 1, 2014
• Vehicle Recalls
  Recalls · Technical service bulletin · Equipment · issued Jun 30, 2014
• Programming And Activation Of Replacement OnStar Modules.
  PIC5588B · Technical service bulletin · Equipment · issued Jun 1, 2014
• Information On Requests To Add OnStar Bluetooth Option.
  PIT4864F · Technical service bulletin · Equipment · issued Mar 1, 2014
• Canadian Customers Unable To Place Calls In The United States
  PIT5264 · Technical service bulletin · Equipment · issued Mar 1, 2014
• Refinishing Aluminum Wheels This bulletin updates General Motor's position on refinishing aluminum wheels. GM does not endorse any repairs that involve welding, bending, straighten…
  99-08-51-007F · Technical service bulletin · Wheels · issued Feb 1, 2014
• Refinishing Aluminum Wheels This bulletin updates General Motor's position on refinishing aluminum wheels. GM does not endorse any repairs that involve welding, bending, straighten…
  99-08-51-007F · Technical service bulletin · Equipment · issued Feb 1, 2014
• Underbody Component Corrosion The following information may be helpful when addressing underbody component corrosion with customers. Some customers may comment that one or more of …
  PI0281D · Technical service bulletin · Equipment Adaptive/mobility · issued Jan 1, 2014
• Underbody Component Corrosion The following information may be helpful when addressing underbody component corrosion with customers. Some customers may comment that one or more of …
  PI0281D · Technical service bulletin · Structure · issued Jan 1, 2014
• Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
  130089009 · Technical service bulletin · Engine and Engine Cooling · issued Sep 1, 2013
• This informational bulletin provides information regarding the inappropriate warranty claims submitted for damaged radios and instrument panel clusters, provides exampls on whats a…
  08-08-44-015C · Technical service bulletin · Equipment · issued Nov 29, 2012
• This informational bulletin provides information regarding the inappropriate warranty claims submitted for damaged radios and instrument panel clusters, provides exampls on whats a…
  08-08-44-015C · Technical service bulletin · Equipment · issued Nov 29, 2012
• This informational bulletin provides a description of the proper wheel installation and proper wheel torque techniques used to install wheels onto vehicles
  12-03-10-002 · Technical service bulletin · Equipment · issued Nov 26, 2012
• This informational bulletin provides a description of the proper wheel installation and proper wheel torque techniques used to install wheels onto vehicles
  12-03-10-002 · Technical service bulletin · Wheels · issued Nov 26, 2012
• This informational bulletin provides information for requesting a new key code for customers with lost or stolen keys
  12-00-89-002A · Technical service bulletin · Equipment · issued Nov 13, 2012
• Programming And Activation Of Replacement OnStar Modules.
  PIC5588A · Technical service bulletin · Equipment · issued Oct 1, 2012
• Gm: on some truck models there is some frame corrosion. *rm updated on 5/2/2012. *kb
  PIT-3749D · Technical service bulletin · Structure · issued Apr 1, 2012
• 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 dr…
  SB-10-08-50-003B · Technical service bulletin · Seats · issued Nov 1, 2011
• General motors corp: special coverage adjustment; analog onstar deactivation. *pe updated 2/17/09. *pe
  08089-B · Technical service bulletin · Electrical System · issued Nov 1, 2008
• Buick chevrolet gmc oldsmobile service campaign: see document search button for owner letter. Special coverage adjustment - fuel tank modular reservoir assembly corrosion. Csc lett…
  07076 · Technical service bulletin · Fuel System, Gasoline · issued Oct 1, 2008
• Release of steering gear stub shaft bearing kit for service. *tt updated 08-15-07. *kb updated 10/09/07. *nj
  040232001 · Technical service bulletin · Steering · issued Aug 1, 2007
• Abs light on, dtc's c0265, c0201, u1041 set and/or loss of communication with brake module. (reground ebcm ground). *kb
  040525002 · Technical service bulletin · Service Brakes, Air · issued Jun 1, 2007
• Rear liftgate binds, improper fit. May be caused by broken welds or cracks formed around the two inner welds. *kb
  060866011 · Technical service bulletin · Structure · issued Aug 1, 2006
• Service engine soon (ses) light on, diagnostic trouble code (dtc) p0483. *tt
  040604090 · Technical service bulletin · Engine and Engine Cooling · issued May 2, 2006
• Ipc, interior lights and/or headlamps flicker. *ak fb2
  3170E · Technical service bulletin · Interior Lighting · issued Feb 16, 2006
• Supplement to campaign 04087 / screws break in the tail lamp housing. *sc
  3335 · Technical service bulletin · Exterior Lighting · issued Oct 27, 2005
• Information on unstable/rough/lumpy engine idle, and low speed vehicle surge, random disturbance or vehicle shudder. *tt
  040604076 · Technical service bulletin · Engine and Engine Cooling · issued Jun 1, 2005
• Rear parking brake shoe retaining spring clip service kit for drum-in-hat (dih) equipped vehicles. *tt update. *tt
  020526001B · Technical service bulletin · Service Brakes, Air · issued Jan 1, 2005
• Blower speed changes on its own. *tc update. *tt
  3152 · Technical service bulletin · Equipment · issued Dec 1, 2004
• Washer motor for the front wipers continuously runs while the key on. *sc update. *tt
  3110A · Technical service bulletin · Visibility · issued Nov 5, 2004
• Tail lamp/stop lamp(s) may become inoperative. Gm administrative message. *nm
  04017A · Technical service bulletin · Exterior Lighting · issued Sep 29, 2004
• Various interior electrical concerns, ip gauges/lighting inoperative, hvac controls inoperative, blower motor inoperative, radio inoperative, flasher inoperative. *tt
  040845010 · Technical service bulletin · Electrical System · issued Sep 1, 2004
• Inside rear view mirror does not display ambient temperature with cj2 option. *tc
  3151 · Technical service bulletin · Visibility · issued Jan 1, 2004
• Intermittent no crank no start. Security light may be on or off. 4.2 ll8 engine. *nm
  02023 · Technical service bulletin · Engine and Engine Cooling · issued Jan 1, 2004
• 4.2 4l60e engine cooling fan contacts shroud after replacing radiator. *mr
  01676 · Technical service bulletin · Engine and Engine Cooling · issued Jan 1, 2004
• Initialization and re-initialization of sunroof mdiv motor. Also including 2003 buick rainier, and 2004 chevrolet trailblazer ext. *mr
  01899 · Technical service bulletin · Visibility · issued Jan 1, 2004
• Under hood fuse block - 125 amp mega fuse blown. Also including buick rainier 2002, 2003. *mr
  01900 · Technical service bulletin · Electrical System · issued Jan 1, 2004
• Perimeter seal/gasket pulls away from license plate housing and/or excessive adhesive around gasket. *tt
  030866008 · Technical service bulletin · Structure · issued Aug 1, 2003