AutoCodes – GMC – B273A 2014 GMC Sierra

B273A 2014 GMC Sierra Code - Hill Descent Control Switch

Quick Answer

The Body Control Module (BCM) monitors the signal circuit from the Hill Descent Control Switch. Common causes include Faulty Multifunction Switch Instrument Panel, Multifunction Switch Instrument Panel harness is open or shorted, Multifunction Switch Instrument Panel circuit poor electrical connection. 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 2014 GMC Sierra indicates Hill Descent Control Switch.
Common causes: Common causes include Faulty Multifunction Switch Instrument Panel, Multifunction Switch Instrument Panel harness is open or shorted, Multifunction Switch Instrument Panel circuit poor electrical connection.
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.

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Code Popularity 166

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 30, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B273A 2014 GMC Sierra Description

The Body Control Module (BCM) monitors the signal circuit from the Hill Descent Control Switch. The hill descent switch is a momentary switch that is normally open. When the hill descent control switch is pressed once, the body control module will request the electronic brake control module via serial data to disable or enable the hill descent control. When activated, the switch grounds the hill descent control system signal circuit. The electronic brake control module then enables or disables the hill descent control system. The electronic brake control module will request the instrument cluster via serial data to turn the hill descent indicator ON or OFF to notify the driver.

OBDII Code B273A 2014 GMC Sierra - Hill Descent Control Switch - AutoCodes.com — B273A 2014 GMC Sierra Code - Hill Descent Control Switch

What does this mean?

What are the Possible Causes of the DTC B273A 2014 GMC Sierra?

Faulty Multifunction Switch Instrument Panel
Multifunction Switch Instrument Panel harness is open or shorted
Multifunction Switch Instrument Panel circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B273A 2014 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B273A 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B273A 2014 GMC Sierra code?

Need more information on how to fix the B273A 2014 GMC Sierra code? Get Access to Factory Service Manuals

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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 2014 GMC Sierra Code

1. What does the OBDII code B273A mean on a 2014 GMC Sierra?

B273A indicates an issue with the Hill Descent Control (HDC) switch circuit, often related to a fault in the switch itself or its wiring.

2. What are the common symptoms of the B273A code?

Common symptoms include the Hill Descent Control system not functioning, the HDC light staying on or flashing, and possibly a service warning on the dashboard.

3. What causes the B273A code to appear?

The most common causes are a faulty HDC switch, damaged wiring or connectors in the switch circuit, or a malfunction in the Body Control Module (BCM).

4. Can I drive my 2014 GMC Sierra with the B273A code?

Yes, you can drive with this code, but the Hill Descent Control system will be inoperative, which may affect vehicle safety on steep descents.

5. How do I diagnose the B273A code?

Start by inspecting the HDC switch and its wiring for damage or loose connections. Use a scan tool to check for related codes and perform circuit testing to confirm the fault.

6. How do I fix the B273A code on my GMC Sierra?

Repairs may involve replacing the HDC switch, repairing damaged wiring, or reprogramming/updating the Body Control Module if necessary.

7. How much does it cost to fix the B273A code?

Costs vary but typically range from $50 to $200 for parts and labor, depending on whether the switch or wiring needs replacement.

8. Can the B273A code clear itself?

The code will not clear itself until the underlying issue is resolved and the system is reset with a scan tool.

9. What tools are needed to troubleshoot the B273A code?

A diagnostic scan tool, a multimeter, and basic hand tools are typically required for troubleshooting this code.

10. Is the B273A code specific to GMC Sierra models?

While B273A is common in GMC vehicles, it can also appear in other GM models with a Hill Descent Control system.

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