AutoCodes – GMC – U1513 GMC

U1513 GMC Code - Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Left Headlamp On LIN Bus

Quick Answer

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Left Headlamp, Left Headlamp harness is open or shorted, Left 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: U1513 GMC indicates Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Left Headlamp On LIN Bus.
Common causes: Common causes include Faulty Left Headlamp, Left Headlamp harness is open or shorted, Left 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 792

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 Jun 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U1513 GMC Description

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message to Headlamp Control Module/Headlamp Leveling Control Module from Left Headlamp has not been received.

OBDII Code U1513 GMC - Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Left Headlamp On LIN Bus - AutoCodes.com — U1513 GMC Code - Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Left Headlamp On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1513 GMC?

Faulty Left Headlamp
Left Headlamp harness is open or shorted
Left Headlamp circuit poor electrical connection
Faulty Headlamp Control Module/Headlamp Leveling Control Module

How to Fix the DTC U1513 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1513 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 U1513 GMC code?

Need more information on how to fix the U1513 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1513 GMC code diagnosed by a professional: Find a repair shop in your area

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 U1513 GMC Code

What does the OBDII code U1513 indicate?

The U1513 code indicates a loss of communication between the Headlamp Control Module and the Left Headlamp on the Local Interconnect Network (LIN) bus.

What are common symptoms associated with the U1513 code?

Common symptoms may include malfunctioning left headlamp, erratic headlamp operation, or the left headlamp not turning on at all.

What could cause the U1513 code to trigger?

Possible causes include faulty wiring or connections in the LIN bus, a defective Headlamp Control Module, or a failed Left Headlamp Assembly.

How can I diagnose the U1513 code?

Start by checking the wiring and connectors for damage or corrosion. Use a scan tool to monitor the communication signals on the LIN bus and check for other related codes.

What should I check first when troubleshooting U1513?

Begin by inspecting the wiring harness and connectors associated with the Headlamp Control Module and Left Headlamp for any signs of wear, damage, or loose connections.

Can I drive my vehicle with the U1513 code?

It's not recommended to drive the vehicle with this code, as it may affect the headlamp operation, which is essential for night driving and safety.

What are some common repairs for the U1513 code?

Repairs may include replacing damaged wiring, reconnecting loose connectors, replacing the Headlamp Control Module, or replacing the left headlamp if it's defective.

Is it necessary to reset the OBDII system after fixing the U1513 code?

Yes, after repairs are made, itâ€™s a good practice to clear the code with a scan tool and perform a test drive to ensure the issue has been resolved.

Can a blown fuse cause the U1513 code?

Yes, a blown fuse related to the headlamp circuit can cause communication issues, so checking and replacing any blown fuses is an important step in troubleshooting.

How can I prevent future occurrences of the U1513 code?

Regularly inspect the vehicle's electrical connections and wiring for wear and damage, and ensure that any repairs are done correctly to maintain the integrity of the LIN bus system.