AutoCodes – GMC – B260D 2018 GMC Sierra

B260D 2018 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 Daytime Running Lamps, Left Daytime Running Lamps harness is open or shorted, Left Daytime Running Lamps 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: B260D 2018 GMC Sierra indicates Left Daytime Running Lamps Control Circuit.
Common causes: Common causes include Faulty Left Daytime Running Lamps, Left Daytime Running Lamps harness is open or shorted, Left Daytime Running Lamps 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 152

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
Cost to Diagnose
FAQs
Comments
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Code B260D 2018 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 V depending on outside lighting conditions. The Body Control Module (BCM) provides a 5 V reference signal to the ambient light sensor and the Heating, Ventilation, and Air Conditioning (HVAC) 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 lamps or automatic lamp control when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the designated daytime running lamps 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 daytime running lamps operation. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a problem in the left park/daytime running lamp control circuit.

OBDII Code B260D 2018 GMC Sierra - Left Daytime Running Lamps Control Circuit - AutoCodes.com — B260D 2018 GMC Sierra Code - Left Daytime Running Lamps Control Circuit

What does this mean?

What are the Possible Causes of the DTC B260D 2018 GMC Sierra?

Faulty Left Daytime Running Lamps
Left Daytime Running Lamps harness is open or shorted
Left Daytime Running Lamps circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B260D 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B260D 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 B260D 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 B260D 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B260D in a 2018 GMC Sierra related to the Left Daytime Running Lamps Control Circuit?

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

2. What are the possible causes of OBDII code B260D in a 2018 GMC Sierra?

Possible causes include a faulty lamp assembly, damaged wiring harness, poor electrical connections, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code B260D in a 2018 GMC Sierra?

You can diagnose the issue by visually inspecting the left daytime running lamp, checking the wiring harness for damage, testing the electrical connections, and using a diagnostic scanner to read the trouble codes.

4. Can I repair OBDII code B260D in a 2018 GMC Sierra myself?

Depending on your skill level and equipment, you may be able to repair it yourself by replacing the faulty lamp assembly, repairing the wiring harness, fixing electrical connections, or resetting the control module.

5. Is it safe to continue driving my 2018 GMC Sierra with OBDII code B260D related to the Left Daytime Running Lamps Control Circuit?

It is not recommended to drive the vehicle with a malfunctioning daytime running lamp as it may reduce visibility and compromise safety.

6. How much does it typically cost to fix OBDII code B260D in a 2018 GMC Sierra?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $50 for simple fixes like bulb replacement to a few hundred dollars for more complex repairs involving wiring or control module replacement.

7. What should I do if I reset the trouble code for B260D in my 2018 GMC Sierra and it comes back?

If the trouble code reappears after resetting, it indicates that the underlying issue has not been properly addressed and further diagnosis and repair are necessary.

8. Are there any preventative maintenance tips to avoid OBDII code B260D in a 2018 GMC Sierra?

Regularly inspecting the condition of the lamps, checking the wiring for any signs of wear, and ensuring all electrical connections are secure can help prevent issues leading to this trouble code.

9. Can extreme weather conditions impact the likelihood of OBDII code B260D in a 2018 GMC Sierra?

Yes, extreme weather conditions like heavy rain, snow, or extreme temperatures can potentially damage the lamp assembly, wiring, or connections, increasing the risk of triggering this trouble code.

10. How long does it usually take to diagnose and repair OBDII code B260D in a 2018 GMC Sierra?

The time required for diagnosis and repair can vary based on the complexity of the issue, but it typically ranges from 30 minutes for simple fixes to a few hours for more involved repairs.