Chevrolet TrailBlazer airbag control unit repair⁽²⁾

What should be considered with Chevrolet TrailBlazer airbag control units?

The airbag control unit of the Chevrolet TrailBlazer evaluates the crash sensors, triggers the airbags and belt tensioners, and monitors the entire system. After an accident it stores crash data and locks itself. Airbag24 repairs the control unit you send in.

At GM the unit is called the SDM (Sensing and Diagnostic Module). It is the central point where all information about a crash comes together. If it detects a fault, it reports it via the airbag warning light.

The airbag warning light can stay on permanently while a fault is stored. Do not work on the airbag system yourself; removal and preparation belong in the hands of a specialist workshop.

Which Chevrolet TrailBlazer generations are there?

Two series of the Chevrolet TrailBlazer need to be told apart: the GMT360, built from 2001 to 2009, and the second generation, built since 2021. The build year and the vehicle identification number (VIN) show which series your vehicle belongs to.

• GMT360 (2001–2009) – the first series of the TrailBlazer, with control units from an earlier electronics generation
• 2nd Generation (since 2021) – the newer series with more extensive airbag equipment

The distinction matters, because control units differ between the series. If in doubt, the build year and VIN help to determine the series clearly.

How do I identify my Chevrolet TrailBlazer airbag control unit?

The part number on the label of the control unit determines the exact version. In addition, check the build year and equipment of your vehicle before creating a repair order.

Known part numbers of these series, without claim to completeness:

• 13534413 (second generation)
• 15080860 (GMT360)
• 15195628 (GMT360)
• 20757496 (GMT360)

Possible fault codes in the fault memory include B1000 (internal performance fault of the control unit), B0052 (crash record after a deployment) and B0012 (driver's steering wheel airbag, ignition circuit stage 1 faulty). However, a single code does not prove a defect in the control unit; the cause must be checked.

Which airbag equipment does the Chevrolet TrailBlazer have?

The airbag equipment of the Chevrolet TrailBlazer depends on the series, build year and trim level. According to equipment overviews for model year 2021, the second generation came with ten airbags as standard. The GMT360 had driver and front passenger airbags as basic equipment.

In the GMT360, front side airbags were fitted differently depending on build year and equipment. Head curtain airbags were not available at first; from 2005 they were optional and from 2008 standard. Whether your vehicle also has a knee airbag is shown in the equipment list of your vehicle.

The route to repair is the same for all series. Have the fault memory read, disconnect the battery and remove the control unit – this should preferably be done by a specialist workshop. Then create a repair order online and send the control unit well packed to Airbag24. Processing usually takes 3–4 working days (checking, repairing, testing).

The repaired control unit comes back with all vehicle data and is ready for use immediately after reinstallation — no coding or programming is required.