AutoCodes – GMC – B305A GMC

B305A GMC Code - No Response From Steering Column Lock Received

Quick Answer

The vehicle theft deterrent subsystem provides the capability to lock or unlock the steering electrically. Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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: B305A GMC indicates No Response From Steering Column Lock Received.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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 2,027

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 Mar 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B305A GMC Description

The vehicle theft deterrent subsystem provides the capability to lock or unlock the steering electrically. The steering column lock module is allowed to unlock when power mode transitions to a non off power mode and an authenticated driver identification device is present. Once the column is unlocked, a crank request can be allowed. The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) has not received any response from the steering column lock module.

OBDII Code B305A GMC - No Response From Steering Column Lock Received - AutoCodes.com — B305A GMC Code - No Response From Steering Column Lock Received

What does this mean?

What are the Possible Causes of the DTC B305A GMC?

Faulty Body Control Module (BCM)
Body Control Module (BCM) harness is open or shorted
Body Control Module (BCM) circuit poor electrical connection
Faulty Steering Column Lock Module

How to Fix the DTC B305A GMC?

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 B305A GMC 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.

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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 B305A GMC Code

1. What does the OBDII code B305A mean on a GMC vehicle?

The code B305A indicates that the vehicleâ€™s control module did not receive a response from the steering column lock, which is part of the anti-theft system.

2. What are the common symptoms of the B305A code?

Symptoms may include the inability to start the vehicle, a "Service Theft Deterrent System" warning on the dashboard, and the steering wheel not locking or unlocking as expected.

3. What causes the B305A code to be triggered?

Common causes include a faulty steering column lock actuator, damaged wiring or connectors, a failed body control module (BCM), or software issues.

4. Can I drive my GMC vehicle with the B305A code?

Driving may not be possible if the steering column lock prevents the vehicle from starting. Even if it starts, ignoring the issue could lead to further complications.

5. How do I diagnose the B305A code?

Diagnose the code by scanning the vehicle with an OBDII scanner, inspecting the steering column lock and related wiring for damage, and testing the lock actuator and BCM functionality.

6. How can the B305A code be fixed?

Repairs may include replacing the steering column lock actuator, repairing damaged wiring, reprogramming the BCM, or updating the vehicleâ€™s software.

7. Is the B305A code related to the anti-theft system?

Yes, the code is directly related to the anti-theft system, as the steering column lock is a critical part of preventing unauthorized vehicle use.

8. How much does it cost to repair the B305A code?

Repair costs vary but can range from $200 to $600, depending on whether a simple wiring repair or replacement of the steering column lock actuator is needed.

9. Can a dead battery cause the B305A code to appear?

Yes, a dead or weak battery can cause communication issues between the BCM and the steering column lock, potentially triggering the code.

10. Do I need to reprogram anything after fixing the B305A code?

Yes, in some cases, reprogramming or recalibrating the BCM or steering column lock may be required after repairs to clear the code and restore proper functionality.