AutoCodes – GMC – B273A 2015 GMC Sierra

B273A 2015 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 2015 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 141

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 2015 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 2015 GMC Sierra - Hill Descent Control Switch - AutoCodes.com — B273A 2015 GMC Sierra Code - Hill Descent Control Switch

What does this mean?

What are the Possible Causes of the DTC B273A 2015 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 2015 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 2015 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 2015 GMC Sierra code?

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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 2015 GMC Sierra Code

1. What does the OBDII code B273A for the Hill Descent Control Switch on a 2015 GMC Sierra indicate?

- This code indicates a malfunction in the Hill Descent Control Switch circuit.

2. What are the common symptoms of a B273A OBDII code on a 2015 GMC Sierra?

- Common symptoms include the Hill Descent Control system not functioning properly or being disabled.

3. What are the possible causes of the B273A OBDII code on a 2015 GMC Sierra?

- Possible causes include a faulty Hill Descent Control Switch, damaged wiring in the circuit, or a malfunctioning control module.

4. How can I diagnose the issue causing the B273A OBDII code on my 2015 GMC Sierra?

- To diagnose the issue, you can perform a visual inspection of the Hill Descent Control Switch and its wiring, check the switch for proper functionality, and use a diagnostic scanner to read the code and further troubleshoot.

5. Can I still drive my 2015 GMC Sierra with the B273A OBDII code present?

- It is generally safe to drive the vehicle with this code, but the Hill Descent Control feature may not work as intended.

6. How can I repair the B273A OBDII code on my 2015 GMC Sierra?

- Repairing the issue may involve replacing the Hill Descent Control Switch, repairing any damaged wiring, or addressing any issues with the control module.

7. Is it recommended to seek professional assistance for fixing the B273A OBDII code on a 2015 GMC Sierra?

- If you are not familiar with automotive electrical systems, it is advisable to seek help from a qualified mechanic or dealership to diagnose and repair the issue correctly.

8. Are there any DIY tips for troubleshooting the B273A OBDII code on a 2015 GMC Sierra?

- DIY tips include checking for loose connections, ensuring the switch is functioning properly, and inspecting the wiring for any visible damage.

9. Can a faulty Hill Descent Control Switch cause other problems in my 2015 GMC Sierra?

- While the primary issue may be related to the Hill Descent Control system, a malfunctioning switch could potentially affect other systems that rely on accurate input from the switch.

10. How can I prevent the B273A OBDII code from reoccurring on my 2015 GMC Sierra?

- To prevent the code from reoccurring, ensure proper installation of any replacement parts, perform regular maintenance checks on the Hill Descent Control system, and address any electrical issues promptly.