AutoCodes – GMC – B2600 2016 GMC Sierra

B2600 2016 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 2016 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 269

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 2016 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 2016 GMC Sierra - Left Daytime Running Lamps Control Circuit - AutoCodes.com — B2600 2016 GMC Sierra Code - Left Daytime Running Lamps Control Circuit

What does this mean?

What are the Possible Causes of the DTC B2600 2016 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 2016 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 2016 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 2016 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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code B2600 in a 2016 GMC Sierra related to the Left Daytime Running Lamps Control Circuit?

- The common symptoms may include the left daytime running lamp not functioning, flickering, or staying on constantly.

2. What are the possible causes of OBDII code B2600 in a 2016 GMC Sierra?

- The code B2600 may be caused by a faulty lamp assembly, wiring issues, a defective control module, or a blown fuse.

3. How can I diagnose the issue related to the Left Daytime Running Lamps Control Circuit in my 2016 GMC Sierra?

- Use a multimeter to check the voltage at the lamp connector, inspect the wiring for any damage, and scan the vehicle's computer for trouble codes.

4. Can I repair the OBDII code B2600 in my 2016 GMC Sierra myself?

- Depending on your experience and tools, you may be able to repair the issue yourself by replacing the faulty lamp assembly, repairing damaged wiring, or resetting the control module.

5. Are there any DIY tips to troubleshoot OBDII code B2600 in a 2016 GMC Sierra before seeking professional help?

- Check the fuse related to the left daytime running lamp, visually inspect the lamp for any visible damage, and ensure all connections are secure and free of corrosion.

6. Is it safe to continue driving my 2016 GMC Sierra with OBDII code B2600 related to the Left Daytime Running Lamps Control Circuit?

- It is generally safe to drive the vehicle with this issue, but it is recommended to address the problem promptly to ensure proper visibility and compliance with road safety regulations.

7. How much can I expect to pay for repairing OBDII code B2600 in a 2016 GMC Sierra at a professional auto repair shop?

- The cost of repairing the Left Daytime Running Lamps Control Circuit issue can vary depending on the exact cause, but it may range from $100 to $300 for parts and labor.

8. Will resetting the OBDII code B2600 in my 2016 GMC Sierra make the issue go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause.

9. How long does it typically take to repair OBDII code B2600 related to the Left Daytime Running Lamps Control Circuit in a 2016 GMC Sierra?

- The repair time can vary based on the exact cause of the issue, but a professional technician may take 1-2 hours to diagnose and repair the problem.

10. Can extreme weather conditions affect the likelihood of experiencing OBDII code B2600 in a 2016 GMC Sierra?

- Extreme weather conditions, such as excessive heat or moisture, can potentially impact the electrical components involved in the Left Daytime Running Lamps Control Circuit and contribute to the occurrence of the B2600 code.