AutoCodes – GMC – B2600 2017 GMC Sierra

B2600 2017 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 2017 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 227

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 2017 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 2017 GMC Sierra - Left Daytime Running Lamps Control Circuit - AutoCodes.com — B2600 2017 GMC Sierra Code - Left Daytime Running Lamps Control Circuit

What does this mean?

What are the Possible Causes of the DTC B2600 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B2600 in a 2017 GMC Sierra related to the Left Daytime Running Lamps Control Circuit?

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

2. What are the possible causes of OBDII code B2600 in a 2017 GMC Sierra?

- The code B2600 can be triggered by a faulty left daytime running lamp bulb, a wiring issue, a malfunctioning lamp control module, or a problem with the vehicle's body control module.

3. How can I diagnose the cause of OBDII code B2600 in my 2017 GMC Sierra?

- To diagnose the issue, you can start by checking the left daytime running lamp bulb for any signs of damage or burnout. Then, inspect the wiring connected to the lamp and the control modules for any visible issues.

4. Can I fix OBDII code B2600 in my 2017 GMC Sierra myself?

- Depending on the cause, you may be able to fix the issue yourself by replacing a faulty bulb, repairing damaged wiring, or resetting the lamp control module. However, if the problem lies with the control modules, professional diagnosis and repair may be needed.

5. Are there any tips for repairing OBDII code B2600 in a 2017 GMC Sierra?

- When repairing the left daytime running lamps control circuit, make sure to use the correct replacement bulb and follow the manufacturer's guidelines for proper installation. Additionally, carefully inspect all wiring connections for any signs of corrosion or damage.

6. Can OBDII code B2600 in a 2017 GMC Sierra cause any other electrical issues?

- While the code B2600 specifically relates to the left daytime running lamps control circuit, it may indicate underlying electrical issues that could potentially affect other vehicle systems. It's important to address the problem promptly to prevent further complications.

7. Will OBDII code B2600 in a 2017 GMC Sierra cause the vehicle to fail inspection?

- Depending on local regulations, a malfunctioning left daytime running lamp controlled by OBDII code B2600 may cause the vehicle to fail inspection. It's advisable to resolve the issue promptly to ensure compliance with safety and emissions standards.

8. Is it safe to continue driving my 2017 GMC Sierra with OBDII code B2600 present?

- While the vehicle may still be operable with a malfunctioning left daytime running lamp, it's recommended to address OBDII code B2600 promptly. Proper functioning of exterior lighting systems is essential for visibility and safety, especially in low-light conditions.

9. How much does it typically cost to repair OBDII code B2600 in a 2017 GMC Sierra?

- The cost of repairing OBDII code B2600 can vary depending on the root cause of the issue. Simple fixes like replacing a bulb may be relatively inexpensive, while more complex repairs involving control modules or wiring could be more costly. It's advisable to obtain estimates from reputable automotive technicians.

10. Can extreme weather conditions affect the triggering of OBDII code B2600 in a 2017 GMC Sierra?

- Extreme weather conditions, such as humidity or temperature fluctuations, may exacerbate existing issues with the left daytime running lamps control circuit, potentially leading to the triggering of OBDII code B2600. Proper maintenance and inspection of the vehicle's lighting systems are recommended to mitigate the impact of weather-related factors.