AutoCodes – GMC – B2699 GMC

B2699 GMC Code - Right Headlamp Control Circuit

Quick Answer

When the Body Control Module (BCM) senses a request for low-beam headlamp illumination, the BCM sends a ground signal to the low-beam headlamp relay through the headlamp low-beam relay control circuit. Common causes include Faulty Right Low Beam Headlamp, Right Low Beam Headlamp harness is open or shorted, Right Low Beam Headlamp 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: B2699 GMC indicates Right Headlamp Control Circuit.
Common causes: Common causes include Faulty Right Low Beam Headlamp, Right Low Beam Headlamp harness is open or shorted, Right Low Beam Headlamp 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 5,926

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 B2699 GMC Description

When the Body Control Module (BCM) senses a request for low-beam headlamp illumination, the BCM sends a ground signal to the low-beam headlamp relay through the headlamp low-beam relay control circuit. The headlamp low beam relay will apply voltage to illuminate the headlamps. The Diagnostic Trouble Code (DTC) sets when the BCM receives a command to illuminate the low beam headlamps and the headlamp low beam relay control circuit is open or shorted to voltage or when the BCM does not receive a command to illuminate the low beam headlamps and the headlamp low beam relay control circuit is shorted to ground.

OBDII Code B2699 GMC - Right Headlamp Control Circuit - AutoCodes.com — B2699 GMC Code - Right Headlamp Control Circuit

What does this mean?

What are the Possible Causes of the DTC B2699 GMC?

Faulty Right Low Beam Headlamp
Right Low Beam Headlamp harness is open or shorted
Right Low Beam Headlamp circuit poor electrical connection
Faulty Low Beam Headlamp Relay
Faulty Body Control Module (BCM)

How to Fix the DTC B2699 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 does this mean?

Code Tech Notes

B2699:01 Right Headlamp Control Circuit Short to Battery
B2699:02 Right Headlamp Control Circuit Short to Ground
B2699:04 Right Headlamp Control Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2699 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 B2699 GMC code?

Need more information on how to fix the B2699 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

B2699 2014 GMC Sierra — Right Headlamp Control Circuit
B2699 2015 GMC Sierra — Right Headlamp Control Circuit
B2699 2016 GMC Sierra — Right Headlamp Control Circuit
B2699 2017 GMC Sierra — Right Headlamp Control Circuit
B2699 2018 GMC Sierra — Right Headlamp 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 B2699 GMC Code

1. What are the common symptoms of OBDII code B2699 GMC (Right Headlamp Control Circuit)?

The common symptoms of code B2699 include the right headlamp not functioning properly, flickering, or staying on constantly.

2. What are the possible causes of OBDII code B2699 GMC?

The code B2699 can be triggered by issues such as a faulty headlamp control module, damaged wiring, or a malfunctioning headlamp assembly.

3. How can I diagnose the OBDII code B2699 GMC on my vehicle?

Diagnosing code B2699 involves performing a thorough inspection of the right headlamp control circuit, checking the connections, and testing the headlamp control module for any faults.

4. Can a blown fuse cause OBDII code B2699 GMC to appear?

Yes, a blown fuse in the right headlamp circuit can trigger code B2699. It's important to check and replace any blown fuses before further diagnosis.

5. What are some repair tips for fixing OBDII code B2699 GMC?

Repair tips for resolving code B2699 may include checking and repairing any damaged wiring, replacing a faulty headlamp control module, or adjusting the headlamp assembly alignment.

6. Is it safe to continue driving with OBDII code B2699 GMC illuminated?

It is not recommended to drive with code B2699 active, as it may affect the proper functioning of the right headlamp, posing a safety risk, especially in low visibility conditions.

7. Can weather conditions affect the appearance of OBDII code B2699 GMC?

Extreme weather conditions, such as heavy rain or snow, can potentially cause water damage to the headlamp control circuit, leading to the triggering of code B2699.

8. How much does it typically cost to repair OBDII code B2699 GMC at a repair shop?

The cost of repairing code B2699 can vary depending on the underlying issue, but it may range from around $100 to $300 for parts and labor at a repair shop.

9. Are there any preventive measures to avoid OBDII code B2699 GMC from reoccurring?

Regularly inspecting the headlamp control circuit, keeping connections clean and secure, and addressing any headlamp issues promptly can help prevent the reoccurrence of code B2699.

10. Can I reset OBDII code B2699 GMC without fixing the underlying issue?

While you can clear the code temporarily, it will likely reappear if the root cause of the issue, such as a faulty headlamp control module, is not addressed.