How to Fix Chevrolet Traverse Brake Light Fail - Complete Guide

By Nick Marchenko, PhD

The Chevrolet Traverse is a reliable family vehicle, but like any car, it can encounter issues. One common problem is the brake lights failing to work properly. This guide will provide a comprehensive DIY approach to diagnosing and fixing this issue.

Tools and Materials Needed

• Replacement bulbs
• Replacement 10A fuse
• Ohmmeter (optional)
• Screwdrivers
• Owner's manual

Step-by-Step Guide

Step 1: Diagnosing the Problem

If your Chevrolet Traverse's lower brake lights are not working while the third brake light does, it's important to diagnose the issue correctly. Since the third light is working, it typically indicates the brake switch is operational. Similarly, if hazard signals use the same bulbs and they function, the bulbs and their connections might not be the issue.

Step 2: Checking the Fuses

Each brake lamp has its own fuse. These are often called the left and right stop lamp fuses. Check your owner's manual for the exact location of these fuses and inspect them visually or with an ohmmeter.

Step 3: Inspecting the Bulbs

Even if the hazard signals work, it's worth checking the brake light bulbs. Replace them if necessary. As a precaution, replace all rear bulbs if they haven't been changed in a long time.

If you are not sure what bulbs are used on a brake light position of your Chevrolet Traverse - check the chart below to find answers and choose the best product for your needs:

• 2019;
• 2018;
• 2017;
• 2016;
• 2015;
• 2014;
• 2013;
• 2012;
• 2011;
• 2010;
• 2009;

Step 4: Body Control Module (BCM) Check

If the turn signals work but the brake lights don't, a faulty BCM could be suspected. However, this is less common and might require professional diagnostics.

Step 5: Fuse Replacement

Replace the 10A stop lamp fuse located in the engine compartment fuse box. There's another inside the car, but typically, the engine compartment fuse is the culprit.

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Step 6: Relay and Brake Pedal Position Sensor

If replacing the fuse doesn't work, consider checking the stop lamp relay and the Brake Pedal Position (BPP) sensor. If the brake pedal isn't returning fully, a bad spring or master cylinder could be the issue.

Additional Tips

• If the brake lights stay on, the issue might be with the pedal not returning to the upright position, which may require adjustment or replacement of the pedal spring or the BPP sensor.
• Always consult your Chevrolet Traverse's manual for specific details on fuse and bulb types.
• When working with electrical components, ensure the vehicle is turned off and the keys are removed from the ignition.
• If you're unsure about any steps, it's best to consult with a professional mechanic.

For more information on maintaining your Chevrolet Traverse, refer to our previous posts:

• Understanding the GM 3.6L Firing Order
• What Size Camper Can a Chevrolet Traverse Pull?
• Chevrolet Traverse Years to Avoid
• Diagnosing Chevrolet Traverse Wheel Bearing Noise

Conclusion

By following this guide, you can diagnose and potentially fix the brake light issue on your Chevrolet Traverse. Safety is paramount, so if at any point you feel uncertain, don't hesitate to reach out to a professional for assistance. Remember, regular maintenance is key to your vehicle's longevity and performance.

Nick Marchenko, PhD

Industrial Engineer & Automotive Content Specialist

Nick writes in-depth guides on car clubs, engine specs, vehicle ownership, and modifications, combining engineering knowledge with automotive passion.

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