AutoCodes – GMC – B2615 2018 GMC Sierra

B2615 2018 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 2018 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 421

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 2018 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 2018 GMC Sierra - Passenger Compartment Dimming 2 Circuit - AutoCodes.com — B2615 2018 GMC Sierra Code - Passenger Compartment Dimming 2 Circuit

What does this mean?

What are the Possible Causes of the DTC B2615 2018 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 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

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2615 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 B2615 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 B2615 2018 GMC Sierra Code

1. What are common symptoms of OBDII code B2615 in a 2018 GMC Sierra related to the Passenger Compartment Dimming 2 Circuit?

The common symptoms include issues with the dimming function of interior lights, such as inconsistent dimming levels or failure to dim properly.

2. What could cause OBDII code B2615 to trigger in a 2018 GMC Sierra?

Potential causes of code B2615 include a faulty passenger compartment dimming switch, wiring issues in the dimming circuit, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code B2615 in my 2018 GMC Sierra?

To diagnose code B2615, you can start by checking the passenger compartment dimming switch for proper operation, inspecting the wiring for any damage, and testing the control module for functionality.

4. Can I still drive my 2018 GMC Sierra with OBDII code B2615 present?

While the vehicle may still be drivable with code B2615, it is recommended to address the issue promptly to ensure proper operation of the interior dimming functions and prevent potential electrical problems.

5. What are some repair tips for fixing OBDII code B2615 in a 2018 GMC Sierra?

Repair tips for resolving code B2615 may include replacing the passenger compartment dimming switch, repairing any damaged wiring in the circuit, or reprogramming the control module as needed.

6. Is it necessary to reset the OBDII code B2615 in a 2018 GMC Sierra after making repairs?

After addressing the underlying issue causing code B2615, it is recommended to reset the code using an OBDII scanner to clear the fault from the vehicle's system.

7. Can a DIY enthusiast fix OBDII code B2615 in a 2018 GMC Sierra, or is professional assistance required?

Depending on your level of automotive expertise, DIY enthusiasts may be able to diagnose and repair code B2615 by following repair guides and using the necessary tools. However, professional assistance is recommended if you are unsure or uncomfortable with the repair process.

8. How much does it typically cost to repair OBDII code B2615 in a 2018 GMC Sierra at a mechanic or dealership?

The cost of repairing code B2615 can vary depending on the exact cause of the issue, parts needed for replacement, labor charges, and dealership or mechanic rates. It's advisable to get a few quotes for accurate pricing.

9. Are there any preventive measures to avoid OBDII code B2615 in a 2018 GMC Sierra in the future?

To prevent OBDII code B2615 from recurring, it's essential to perform regular maintenance checks on the interior dimming system, avoid overloading electrical circuits, and address any electrical issues promptly to prevent further damage.

10. How long does it typically take to repair OBDII code B2615 related to Passenger Compartment Dimming 2 Circuit in a 2018 GMC Sierra?

The repair time for code B2615 can vary based on the specific cause of the issue and the complexity of the repair process. It could range from a quick fix to a more involved repair taking several hours or even days, depending on the extent of the problem.