Engine-CodesGMC – C0267 2018 GMC Sierra

C0267 2018 GMC Sierra Code - Low Brake Fluid Indicated

Quick Answer

The C0267 diagnostic trouble code (DTC) for the 2018 GMC Sierra indicates a low brake fluid condition, which is a critical safety concern for any vehicle. Common causes include Low brake fluid due to normal wear and tear or evaporation, Brake fluid leaks from damaged brake lines, calipers, or the master cylinder, Worn brake pads or shoes causing fluid displacement. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C0267 2018 GMC Sierra indicates Low Brake Fluid Indicated.
Common causes
Common causes include Low brake fluid due to normal wear and tear or evaporation, Brake fluid leaks from damaged brake lines, calipers, or the master cylinder, Worn brake pads or shoes causing fluid displacement.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Oct 10, 2024
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Code C0267 2018 GMC Sierra Description

The C0267 diagnostic trouble code (DTC) for the 2018 GMC Sierra indicates a low brake fluid condition, which is a critical safety concern for any vehicle. Brake fluid is essential for the hydraulic brake system, as it transmits force from the brake pedal to the brake components at the wheels. When the brake fluid level drops below the minimum threshold, it can lead to reduced braking efficiency, increased stopping distances, and potentially complete brake failure.

OBDII Code C0267 2018 GMC Sierra - Low Brake Fluid Indicated
C0267 2018 GMC Sierra Code - Low Brake Fluid Indicated

Common Causes of C0267 2018 GMC Sierra

  1. Low brake fluid due to normal wear and tear or evaporation.
  2. Brake fluid leaks from damaged brake lines, calipers, or the master cylinder.
  3. Worn brake pads or shoes causing fluid displacement.
  4. Faulty brake fluid level sensor or wiring issues.
  5. Contaminated brake fluid leading to degradation and loss of fluid.

Symptoms of C0267 2018 GMC Sierra

  1. Dashboard warning light indicating low brake fluid.
  2. Spongy or soft brake pedal feel.
  3. Increased stopping distance when braking.
  4. Brake fluid leaks visible under the vehicle.
  5. Unusual noises from the brake system, such as grinding or squeaking.

How to Fix C0267 2018 GMC Sierra

  1. Inspect Brake Fluid Level: Begin by checking the brake fluid reservoir to confirm the fluid level is indeed low.
  2. Identify Leaks: Conduct a thorough inspection of the brake lines, calipers, and master cylinder for any signs of leaks or damage.
  3. Replace Fluid: If the fluid is low but no leaks are found, top off the brake fluid with the manufacturer-recommended type.
  4. Replace Damaged Components: If leaks are detected, replace any damaged brake lines, calipers, or the master cylinder as necessary.
  5. Test the System: After repairs, bleed the brake system to remove any air and ensure proper function, then test drive the vehicle to confirm that the braking performance has returned to normal.

Cost to Fix C0267 2018 GMC Sierra

The cost to address a C0267 code can vary widely depending on the underlying cause of the low brake fluid. Basic fluid top-off may cost around $20 to $50, while more extensive repairs, such as replacing a master cylinder or brake lines, can range from $150 to $800 or more. Labor costs typically range from $80 to $150 per hour, depending on the shop's location and reputation. In metropolitan areas or at dealerships, rates may be higher, while independent shops may offer more competitive pricing. It is advisable to obtain a detailed quote from a local repair shop for a more accurate estimate based on the specific diagnosis and required repairs.

Tech Notes for C0267 2018 GMC Sierra









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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C0267 2018 GMC Sierra Code

1. What does the OBDII code C0267 mean on a 2018 GMC Sierra?

Code C0267 indicates the Electronic Brake Control Module (EBCM) has detected a low brake fluid condition in the brake master cylinder reservoir.

2. What are the common symptoms of code C0267 in a 2018 GMC Sierra?

Common symptoms include the brake warning light on the dashboard, reduced braking performance, and a possible ABS warning light.

3. What causes code C0267 in a 2018 GMC Sierra?

Typical causes include low brake fluid levels, a faulty brake fluid level sensor, a leak in the brake system, or issues with the wiring to the sensor.

4. Can I drive my 2018 GMC Sierra with code C0267 active?

It is not recommended to drive with this code active, as it could indicate a serious issue with the braking system that might compromise your safety.

5. How do I check the brake fluid level in my 2018 GMC Sierra?

Locate the brake fluid reservoir near the firewall in the engine bay, check the fluid level against the "MIN" and "MAX" marks, and ensure it is within the recommended range.

6. How do I fix code C0267 in a 2018 GMC Sierra?

Start by checking and refilling the brake fluid if it's low, inspecting the system for leaks, testing the brake fluid level sensor, and repairing any damaged wiring.

7. What tools are needed to diagnose code C0267 on a 2018 GMC Sierra?

Basic tools include a scan tool to read and clear codes, a multimeter to check wiring and sensors, and potentially a brake fluid tester.

8. How can I prevent code C0267 from occurring in my 2018 GMC Sierra?

Regularly inspect and maintain the brake fluid level, check for leaks, and ensure the brake system components are in good condition.

9. How much does it cost to repair code C0267 on a 2018 GMC Sierra?

Repair costs vary but can range from $50 for a brake fluid refill to $500 or more if sensor replacement or leak repairs are needed.

10. Can a faulty brake fluid level sensor alone cause code C0267?

Yes, a malfunctioning brake fluid level sensor can falsely trigger code C0267 even if the brake fluid level is adequate.

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