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B273A 2017 Chevrolet Silverado Code - Hill Descent Control Switch

Quick Answer

The B273A diagnostic trouble code (DTC) on a 2017 Chevrolet Silverado refers to an issue with the Hill Descent Control (HDC) switch. Common causes include Faulty Hill Descent Control switch, Wiring issues or electrical faults in the HDC system, Malfunctioning HDC module. 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
B273A 2017 Chevrolet Silverado indicates Hill Descent Control Switch.
Common causes
Common causes include Faulty Hill Descent Control switch, Wiring issues or electrical faults in the HDC system, Malfunctioning HDC module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code B273A 2017 Chevrolet Silverado Description

The B273A diagnostic trouble code (DTC) on a 2017 Chevrolet Silverado refers to an issue with the Hill Descent Control (HDC) switch. The HDC system is designed to assist drivers when descending steep grades by automatically applying the brakes to maintain a controlled speed. When this code appears, it indicates a malfunction or failure in the HDC switch, which can affect the vehicle's performance and safety.

OBDII Code B273A 2017 Chevrolet Silverado - Hill Descent Control Switch
B273A 2017 Chevrolet Silverado Code - Hill Descent Control Switch

Common Causes of B273A 2017 Chevrolet Silverado

  1. Faulty Hill Descent Control switch.
  2. Wiring issues or electrical faults in the HDC system.
  3. Malfunctioning HDC module.
  4. Sensor issues related to the HDC system.
  5. Software or programming errors in the vehicle's control module.

Symptoms of B273A 2017 Chevrolet Silverado

  1. HDC system not engaging when the switch is activated.
  2. Inability to control vehicle speed when descending steep grades.
  3. Illumination of the HDC warning light on the dashboard.
  4. Erratic behavior of the HDC system, such as sudden braking or acceleration while descending.

How to Fix B273A 2017 Chevrolet Silverado

  1. Begin by diagnosing the specific cause of the B273A code using a diagnostic scanner to pinpoint the issue.
  2. Inspect the HDC switch for any visible damage or signs of wear. Replace the switch if necessary.
  3. Check the wiring and connections related to the HDC system for any loose connections or damage. Repair or replace as needed.
  4. Test the HDC system to ensure proper functionality after repairs have been completed.
  5. Clear the DTC from the vehicle's memory using the diagnostic scanner.

Cost to Fix B273A 2017 Chevrolet Silverado

The cost of repairing a B273A code related to the Hill Descent Control switch on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of replacing the HDC switch itself can range from $50 to $150, while addressing wiring or sensor issues may increase the total cost. Labor rates at auto repair shops typically range from $80 to $150 per hour, so the total repair cost can vary based on the shop's rates and the time required to diagnose and fix the problem. It's recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on the specific circumstances of the vehicle.

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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 B273A 2017 Chevrolet Silverado Code

1. What does OBDII code B273A mean on a 2017 Chevrolet Silverado related to the Hill Descent Control Switch?

This code indicates a fault with the Hill Descent Control Switch circuit.

2. What are the common symptoms of OBDII code B273A on a 2017 Chevrolet Silverado?

Common symptoms may include the Hill Descent Control system not functioning properly, the dashboard light for the system staying illuminated, or the switch itself not responding.

3. What are possible causes of OBDII code B273A on a 2017 Chevrolet Silverado?

Potential causes include a faulty Hill Descent Control Switch, damaged wiring or connectors in the circuit, or a malfunction in the control module.

4. How can I diagnose the issue related to OBDII code B273A on my 2017 Chevrolet Silverado?

You can start by visually inspecting the Hill Descent Control Switch and associated wiring for any damage. Using a diagnostic scanner to read the code and perform further testing on the switch and circuit can help pinpoint the problem.

5. Can I still drive my 2017 Chevrolet Silverado with OBDII code B273A present?

While the vehicle may still be operational, it is recommended to have the issue diagnosed and repaired to ensure the Hill Descent Control system functions correctly when needed.

6. Is it safe to continue using the Hill Descent Control feature with OBDII code B273A active?

It is not advisable to use the Hill Descent Control feature when the system is showing an error code, as it may not work as intended and could potentially cause safety hazards.

7. How can I repair OBDII code B273A on my 2017 Chevrolet Silverado?

Repair options include replacing the Hill Descent Control Switch if it is faulty, repairing any damaged wiring or connectors in the circuit, or reprogramming the control module if needed.

8. Can OBDII code B273A on a 2017 Chevrolet Silverado be cleared with a simple reset?

Clearing the code with a diagnostic scanner may temporarily turn off the warning light, but the underlying issue causing the code will need to be addressed to prevent it from reoccurring.

9. Are there any recalls or technical service bulletins related to OBDII code B273A on the 2017 Chevrolet Silverado?

It is recommended to check with a Chevrolet dealership or the manufacturer's website for any recalls or technical service bulletins related to this specific OBDII code.

10. How much can I expect to pay for repairs related to OBDII code B273A on my 2017 Chevrolet Silverado?

The cost of repairs can vary depending on the exact cause of the issue and labor rates in your area. It is advisable to obtain quotes from reputable mechanics or dealerships for an accurate estimate.

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