AutoCodes – GMC – B2600 2014 GMC Sierra

B2600 2014 GMC Sierra Code - Left Daytime Running Lamps Control Circuit

Quick Answer

The ambient light sensor is used to monitor outside lighting conditions. Common causes include Faulty Left Headlamp Assembly, Left Headlamp Assembly harness is open or shorted, Left Headlamp 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: B2600 2014 GMC Sierra indicates Left Daytime Running Lamps Control Circuit.
Common causes: Common causes include Faulty Left Headlamp Assembly, Left Headlamp Assembly harness is open or shorted, Left Headlamp 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 463

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 26, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2600 2014 GMC Sierra Description

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 volts depending on outside lighting conditions. The Body Control Module (BCM) provides a 5-volt reference signal to the ambient light sensor and the Heating, Ventilation, and Air Conditioning (HVAC) control module provides a low reference ground. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either Daytime Running Lights (DRL) or Automatic Lamp Control (ALC) when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the DRLs ON. During low light conditions, the BCM will command the low beam headlamps ON. Any function or condition that turns on the headlamps will cancel the DRL operation. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a problem in the left DRL control circuit.

OBDII Code B2600 2014 GMC Sierra - Left Daytime Running Lamps Control Circuit - AutoCodes.com — B2600 2014 GMC Sierra Code - Left Daytime Running Lamps Control Circuit

What does this mean?

What are the Possible Causes of the DTC B2600 2014 GMC Sierra?

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

How to Fix the DTC B2600 2014 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

B2600:01 Left Daytime Running Lamps Control Circuit short to Battery
B2600:02 Left Daytime Running Lamps Control Circuit Short to Ground
B2600:04 Left Daytime Running Lamps Control Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2600 2014 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 B2600 2014 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 B2600 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code B2600 in a 2014 GMC Sierra related to the Left Daytime Running Lamps Control Circuit?

- Common symptoms include the left daytime running lamp not functioning, intermittent operation of the left DRL, or a warning light on the dashboard.

2. What are the possible causes of OBDII code B2600 in a 2014 GMC Sierra?

- Causes may include a faulty left daytime running lamp bulb, a damaged wiring harness, a malfunctioning light control module, or a problem with the DRL relay.

3. How can I diagnose the issue causing OBDII code B2600 in my 2014 GMC Sierra?

- Use a multimeter to check the continuity of the wiring connected to the left daytime running lamp, inspect the bulb for any signs of damage, and test the functionality of the light control module and relay.

4. Are there any simple repairs I can try to fix OBDII code B2600 in my 2014 GMC Sierra before seeking professional help?

- Yes, you can start by replacing the left daytime running lamp bulb with a new one and checking the wiring harness for any visible damage or loose connections.

5. Is it safe to continue driving my 2014 GMC Sierra with OBDII code B2600 related to the Left Daytime Running Lamps Control Circuit?

- It is not recommended to drive with non-functioning daytime running lamps as they are essential for visibility and safety, especially during daytime hours.

6. Can weather conditions or environmental factors contribute to triggering OBDII code B2600 in a 2014 GMC Sierra?

- Yes, extreme weather conditions, such as heavy rain or snow, can cause moisture to affect the electrical components of the left daytime running lamp circuit, leading to the code.

7. How much does it typically cost to repair OBDII code B2600 in a 2014 GMC Sierra at a professional auto repair shop?

- The cost of repairs can vary depending on the specific issue causing the code, but it may range from $100 to $300 for parts and labor.

8. Will resetting the OBDII code B2600 in my 2014 GMC Sierra make the issue with the Left Daytime Running Lamps Control Circuit disappear?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the malfunction in the left daytime running lamp circuit.

9. Is it possible for a DIY enthusiast to repair OBDII code B2600 in a 2014 GMC Sierra without professional help?

- Yes, if you have the necessary tools, knowledge, and experience working with automotive electrical systems, you may be able to diagnose and repair the issue causing the code on your own.

10. How can I prevent OBDII code B2600 from recurring in my 2014 GMC Sierra after repairing the Left Daytime Running Lamps Control Circuit issue?

- To prevent the code from reoccurring, regularly check and maintain the condition of the daytime running lamps, wiring harness, and related components, and address any issues promptly.