AutoCodes – GMC – B2560 GMC

B2560 GMC Code - Cargo Lamps Control Circuit

Quick Answer

The cargo lamp relay is always supplied with battery voltage. Common causes include Faulty Cargo Lamp Relay, Cargo Lamp Relay harness is open or shorted, Cargo Lamp Relay 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: B2560 GMC indicates Cargo Lamps Control Circuit.
Common causes: Common causes include Faulty Cargo Lamp Relay, Cargo Lamp Relay harness is open or shorted, Cargo Lamp Relay 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 507

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 25, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2560 GMC Description

The cargo lamp relay is always supplied with battery voltage. The cargo lamp switch signal circuit is grounded momentarily by pressing the cargo lamp switch. The Body Control Module (BCM) energizes the cargo lamp relay by applying ground to the cargo lamp relay control circuit. When the cargo lamp relay is energized, the relay switch contacts close, and battery voltage is applied through the fuse to the cargo lamp control circuit which illuminates the cargo lamps. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a problem in the cargo lamp switch ground circuit.

OBDII Code B2560 GMC - Cargo Lamps Control Circuit - AutoCodes.com — B2560 GMC Code - Cargo Lamps Control Circuit

What does this mean?

What are the Possible Causes of the DTC B2560 GMC?

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

How to Fix the DTC B2560 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 B2560 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 B2560 GMC code?

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Need Help with the Code?

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Information for Specific GMC Models

B2560 2014 GMC Sierra — Cargo Lamps Control Circuit
B2560 2015 GMC Sierra — Cargo Lamps Control Circuit
B2560 2016 GMC Sierra — Cargo Lamps Control Circuit
B2560 2017 GMC Sierra — Cargo Lamps Control Circuit
B2560 2018 GMC Sierra — Cargo Lamps Control 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 B2560 GMC Code

1. What are the common symptoms of OBDII code B2560 GMC (Cargo Lamps Control Circuit)?

- The common symptoms include inoperative cargo lamps, flickering cargo lamps, or cargo lamps that stay on constantly.

2. What are the possible causes of OBDII code B2560 GMC?

- The code B2560 GMC can be caused by a faulty cargo lamp switch, damaged wiring in the cargo lamp circuit, or a malfunctioning body control module.

3. How can I diagnose OBDII code B2560 GMC?

- To diagnose code B2560, you can start by visually inspecting the cargo lamp circuit for any visible damage. Using a multimeter, you can also test the cargo lamp switch and check for proper voltage at various points in the circuit.

4. Can a DIYer repair OBDII code B2560 GMC?

- Yes, depending on the exact cause, a DIYer may be able to repair code B2560 GMC by replacing a faulty cargo lamp switch, repairing damaged wiring, or resetting the body control module.

5. What should I do if my cargo lamps are not working but the fuse is not blown?

- If your cargo lamps are not working despite the fuse being intact, you should check the cargo lamp switch, the wiring connections, and the body control module for any issues.

6. Are there any quick fixes for OBDII code B2560 GMC?

- A quick fix for code B2560 GMC could involve checking and tightening any loose wiring connections related to the cargo lamp circuit.

7. Is it safe to continue driving with OBDII code B2560 GMC triggered?

- It is generally safe to continue driving with code B2560 GMC triggered, but you may want to address the issue promptly to ensure proper functioning of your cargo lamps.

8. How much does it typically cost to repair OBDII code B2560 GMC at a mechanic?

- The cost of repairing code B2560 GMC at a mechanic can vary depending on the exact cause of the issue, but it may range from $100 to $300, including parts and labor.

9. Can a faulty cargo lamp cause OBDII code B2560 GMC to trigger?

- Yes, a faulty cargo lamp or cargo lamp circuit can cause OBDII code B2560 GMC to trigger, especially if there is a malfunction in the control circuit.

10. How can I prevent OBDII code B2560 GMC from recurring in the future?

- To prevent code B2560 GMC from recurring, ensure regular maintenance checks on your cargo lamp circuit, promptly address any issues with the cargo lamp switch, and avoid overloading the cargo lamps beyond their capacity.