AutoCodes – GMC – B3130 2018 GMC Sierra

B3130 2018 GMC Sierra Code - All Doors Unlock Circuit

Quick Answer

The Body Control Module (BCM) supplies a 12-volt signal to the lock and unlock signal circuits of the driver and passenger door lock switches. Common causes include Faulty Door Latch Assembly, Door Latch Assembly harness is open or shorted, Door Latch Assembly 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: B3130 2018 GMC Sierra indicates All Doors Unlock Circuit.
Common causes: Common causes include Faulty Door Latch Assembly, Door Latch Assembly harness is open or shorted, Door Latch Assembly 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 151

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 Jun 11, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B3130 2018 GMC Sierra Description

The Body Control Module (BCM) supplies a 12-volt signal to the lock and unlock signal circuits of the driver and passenger door lock switches. When the appropriate switch is pressed, a contact within the door lock switch closes providing a ground path for the signal circuit. The BCM will detect the voltage drop in the signal and will command the doors to perform the lock or unlock functions. The BCM may also receive a LOCK or UNLOCK command from the Keyless Entry Control Module.
The BCM, upon receipt of a lock switch lock or unlock signal, will supply voltage to the door lock actuator lock or unlock control circuits. Since the opposite side of the lock actuator is connected to the ground through the other lock actuator control circuit, the doors will then lock or unlock as commanded. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground or open/high resistance on a door latch control circuit.

OBDII Code B3130 2018 GMC Sierra - All Doors Unlock Circuit - AutoCodes.com — B3130 2018 GMC Sierra Code - All Doors Unlock Circuit

What does this mean?

What are the Possible Causes of the DTC B3130 2018 GMC Sierra?

Faulty Door Latch Assembly
Door Latch Assembly harness is open or shorted
Door Latch Assembly circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3130 2018 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 does this mean?

Code Tech Notes

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3130 2018 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 B3130 2018 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 B3130 2018 GMC Sierra Code

1. What does the OBDII code B3130 mean on a 2018 GMC Sierra?

Code B3130 indicates an issue with the "All Doors Unlock Circuit," meaning the system is having trouble unlocking all doors as commanded.

2. What are the symptoms of code B3130 in a 2018 GMC Sierra?

Symptoms may include failure of all doors to unlock, intermittent door unlocking issues, or no response from the key fob or door switches.

3. What causes code B3130 in a GMC Sierra?

Common causes include a faulty door lock actuator, damaged wiring or connectors in the door unlock circuit, or a malfunctioning body control module (BCM).

4. Can a weak key fob battery trigger code B3130?

No, a weak key fob battery typically does not trigger this code. However, it may cause similar symptoms, so it's worth checking the key fob battery first.

5. How do you diagnose code B3130 on a 2018 GMC Sierra?

Diagnosis involves using a scan tool to check for additional codes, inspecting the door lock actuators and wiring, and testing the BCM for proper functionality.

6. Is code B3130 specific to the GMC Sierra?

No, this code can appear on other GM vehicles as well, but it is specific to systems related to the "All Doors Unlock Circuit."

7. Can you still drive your 2018 GMC Sierra with code B3130?

Yes, the vehicle is still drivable, but you may experience inconvenience or security issues due to malfunctioning door locks.

8. What repairs are needed to fix code B3130?

Repairs may include replacing a faulty door lock actuator, repairing damaged wiring or connectors, or reprogramming or replacing the BCM.

9. How much does it cost to fix code B3130 on a 2018 GMC Sierra?

Repair costs vary but typically range from $100 to $500, depending on whether the issue is with the actuator, wiring, or BCM.

10. Can I fix code B3130 myself?

If you have basic automotive repair knowledge, you can inspect wiring and connectors or replace a faulty actuator. However, BCM issues may require professional diagnostics and repair.