AutoCodes – GMC – B2615 GMC

B2615 GMC 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 GMC 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 5,937

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 29, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B2615 GMC 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 GMC - Passenger Compartment Dimming 2 Circuit - AutoCodes.com — B2615 GMC Code - Passenger Compartment Dimming 2 Circuit

What does this mean?

What are the Possible Causes of the DTC B2615 GMC?

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 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2615 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.

Need more information about the B2615 GMC code?

Need more information on how to fix the B2615 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2615 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B2615 2014 GMC Sierra — Passenger Compartment Dimming 2 Circuit
B2615 2015 GMC Sierra — Passenger Compartment Dimming 2 Circuit
B2615 2016 GMC Sierra — Passenger Compartment Dimming 2 Circuit
B2615 2017 GMC Sierra — Passenger Compartment Dimming 2 Circuit
B2615 2018 GMC Sierra — Passenger Compartment Dimming 2 Circuit

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 GMC Code

1. What are common symptoms of OBDII code B2615 GMC (Passenger Compartment Dimming 2 Circuit)?

- Common symptoms include interior lights not dimming properly, erratic dimming behavior, or total failure of the dimming function.

2. What are some possible causes of OBDII code B2615 GMC?

- Possible causes include a faulty dimming switch, a malfunctioning dimming module, wiring issues, or a blown fuse related to the dimming circuit.

3. How can I diagnose the issue related to OBDII code B2615 GMC?

- You can diagnose the issue by checking the dimming switch for proper functionality, inspecting the dimming module for any signs of damage, and testing the wiring and fuse related to the dimming circuit.

4. How can I repair OBDII code B2615 GMC on my GMC vehicle?

- To repair this code, you may need to replace the dimming switch, repair or replace the dimming module, fix any wiring issues, or replace a blown fuse in the dimming circuit.

5. Is it safe to continue driving with OBDII code B2615 GMC active?

- It is generally safe to continue driving with this code, as it primarily affects the interior dimming function and does not pose a significant risk to vehicle operation.

6. Can I reset OBDII code B2615 GMC with a simple battery disconnect?

- While disconnecting the battery may reset the code temporarily, it is recommended to diagnose and repair the underlying issue to prevent the code from reoccurring.

7. Will OBDII code B2615 GMC cause my vehicle to fail an emissions test?

- This code is not directly related to emissions, so it should not cause your vehicle to fail an emissions test. However, it is still important to address the issue for proper vehicle function.

8. How much can I expect to pay for repairs related to OBDII code B2615 GMC?

- Repair costs for this code can vary depending on the specific cause of the issue, but they may range from $100 to $300 for parts and labor.

9. Are there any preventative measures I can take to avoid OBDII code B2615 GMC in the future?

- To prevent this code, you can perform regular checks on the interior dimming function, avoid overloading the dimming circuit, and address any dimming issues promptly.

10. Can I fix OBDII code B2615 GMC myself, or do I need to take my vehicle to a mechanic?

- Depending on your level of automotive expertise, you may be able to diagnose and repair this code yourself by following the manufacturer's service manual. However, if you are unsure, it is recommended to seek the help of a qualified mechanic.