Airbag control unit with part number 20757496

What does the airbag control unit 20757496 do?

The airbag control unit 20757496 controls the restraint system (SRS) for Chevrolet. It reads the signals from the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

If the unit detects a fault, it reports it via the airbag warning light. Monitoring therefore does not run only in an emergency, but permanently in the background.

After an accident, the control unit stores crash data and locks itself. The crash data is the central point for the repair.

Why does the control unit 20757496 fail?

The most common cause on the 20757496 is stored crash data after an accident, even if no airbag has triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion, and voltage spikes.

A normal diagnostic tool cannot erase the crash data. Airbag24 removes it as part of the repair.

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 20757496 is defective?

The airbag warning light in the instrument cluster lights up on the 20757496 permanently or intermittently. An error message also appears in the instrument cluster.

A further sign is that a diagnostic tool cannot establish a connection to the control unit. Even if the fault memory cannot be cleared, there is a problem in the system.

The airbags and seatbelt pretensioners may then not trigger in an emergency. Do not ignore the warning, and have the system checked promptly.

Which vehicles is the 20757496 fitted in?

The 20757496 is fitted in these vehicles: Chevrolet TrailBlazer GMT360 (2001-2009).

The overview below shows which vehicles this unit is intended for:

• Chevrolet TrailBlazer GMT360 (2001-2009)

Comparing the part number on the label with this page only confirms that you have removed the correct unit. Whether the control unit is really defective or a plug or cable is the cause is shown only by the fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 15080860, 15195628.

How does the repair of the 20757496 work?

First have the fault memory read out and attach the log. Then disconnect the battery, and only afterwards remove the 20757496.

Next, create a repair order online and send the unit in well packed. Airbag24 checks the control unit on the test bench, replaces defective components, erases the crash data and carries out a function test before your own unit is returned. Processing at Airbag24 usually takes 3–4 working days.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 20757496 get to Airbag24?

You send the 20757496 as a parcel or book a UPS collection for an extra charge. Airbag24 then returns the repaired unit to you by UPS.

Put the printed repair order in the parcel. Pack the unit shockproof.