AutoCodes – GMC – B2615 2015 GMC Sierra

B2615 2015 GMC Sierra Code - Passenger Compartment Dimming 2 Circuit

Quick Answer

The Body Control Module (BCM) applies battery voltage to the dome/reading lamps through the dome/reading lamp control circuit. Common causes include Faulty Courtesy Lamp, Courtesy Lamp harness is open or shorted, Courtesy Lamp 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: B2615 2015 GMC Sierra indicates Passenger Compartment Dimming 2 Circuit.
Common causes: Common causes include Faulty Courtesy Lamp, Courtesy Lamp harness is open or shorted, Courtesy Lamp 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 627

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 29, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B2615 2015 GMC Sierra Description

The Body Control Module (BCM) applies battery voltage to the dome/reading lamps through the dome/reading lamp control circuit. When any door is opened, the jam switch contacts close and the BCM receives a door-ajar input. If the BCM receives a door lock or unlock input or a rear hatch open input, the BCM will activate the dome/reading lamp control circuit, providing battery voltage to dome/reading lamps. In the event that any of these courtesy lamps were to remain illuminated for more than 10 minutes with the ignition switch in the OFF position, the BCM will deactivate the courtesy lamp control circuit to prevent total battery discharge. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a short to ground or open in the dome lamps control circuit terminal.

OBDII Code B2615 2015 GMC Sierra - Passenger Compartment Dimming 2 Circuit - AutoCodes.com — B2615 2015 GMC Sierra Code - Passenger Compartment Dimming 2 Circuit

What does this mean?

What are the Possible Causes of the DTC B2615 2015 GMC Sierra?

Faulty Courtesy Lamp
Courtesy Lamp harness is open or shorted
Courtesy Lamp circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2615 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2615 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.

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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 B2615 2015 GMC Sierra Code

1. What does the OBDII code B2615 mean on a 2015 GMC Sierra?

The B2615 code indicates an issue with the Passenger Compartment Dimming 2 Circuit, which controls interior lighting dimming functionality in the vehicle.

2. What are the symptoms of code B2615 in a 2015 GMC Sierra?

Symptoms include malfunctioning interior lights, such as failure to dim or brighten properly, flickering lights, or lights that remain off or on.

3. What causes the B2615 code to appear?

Common causes include a faulty dimmer switch, damaged wiring or connectors in the dimming circuit, or a malfunctioning body control module (BCM).

4. Can a blown fuse trigger the B2615 code?

Yes, a blown fuse in the dimming circuit can disrupt power flow and cause the B2615 code to appear.

5. How do you diagnose the B2615 code on a 2015 GMC Sierra?

Diagnosis involves checking for blown fuses, inspecting wiring and connectors for damage, testing the dimmer switch, and scanning the BCM for additional fault codes.

6. Can a failing body control module (BCM) cause the B2615 code?

Yes, a malfunctioning BCM can fail to properly control the dimming circuit, leading to the B2615 code.

7. How do you fix the B2615 code on a 2015 GMC Sierra?

Repairs may involve replacing a faulty dimmer switch, repairing damaged wiring or connectors, replacing blown fuses, or reprogramming or replacing the BCM.

8. Is the B2615 code a serious issue?

While it doesnâ€™t typically affect vehicle drivability, it can impact interior lighting functionality, which may be inconvenient or unsafe in low-light conditions.

9. Can I reset the B2615 code without repairs?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue isnâ€™t resolved.

10. What tools are needed to diagnose and repair the B2615 code?

Youâ€™ll need an OBDII scanner, a multimeter for checking voltage and continuity, and basic tools to inspect and replace components in the dimming circuit.