AutoCodes – GMC – U1538 GMC

U1538 GMC Code - Body Control Module Lost Communication With Driver Window Switch 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 Driver Window Switch, Driver Window Switch harness is open or shorted, Driver Window Switch 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: U1538 GMC indicates Body Control Module Lost Communication With Driver Window Switch On LIN Bus.
Common causes: Common causes include Faulty Driver Window Switch, Driver Window Switch harness is open or shorted, Driver Window Switch 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 3,330

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 03, 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 U1538 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 the Body Control Module (BCM) from the Driver Window Switch has not been received.

OBDII Code U1538 GMC - Body Control Module Lost Communication With Driver Window Switch On LIN Bus - AutoCodes.com — U1538 GMC Code - Body Control Module Lost Communication With Driver Window Switch On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1538 GMC?

Faulty Driver Window Switch
Driver Window Switch harness is open or shorted
Driver Window Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC U1538 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 U1538 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 U1538 GMC code?

Need more information on how to fix the U1538 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1538 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 U1538 GMC Code

1. What are the common symptoms of OBDII code U1538 GMC?

The common symptoms of code U1538 GMC include non-functioning power windows, inoperative power door locks, and malfunctioning interior lights.

2. What can cause the Body Control Module to lose communication with the driver window switch on the LIN bus?

The loss of communication between the Body Control Module and the driver window switch on the LIN bus can be caused by issues such as a faulty window switch, damaged wiring, or a malfunctioning Body Control Module.

3. How can I diagnose the cause of code U1538 GMC?

Diagnosing code U1538 GMC involves using a scan tool to communicate with the vehicle's Body Control Module to check for any stored fault codes, testing the driver window switch, inspecting the wiring for damage, and checking the LIN bus communication.

4. What are some repair tips for resolving code U1538 GMC?

Repair tips for resolving code U1538 GMC include checking and repairing any damaged wiring, replacing a faulty driver window switch, ensuring all connections are secure, and reprogramming or replacing the Body Control Module if necessary.

5. Can code U1538 GMC be cleared with a simple reset?

Clearing code U1538 GMC with a simple reset may temporarily resolve the issue, but if the underlying problem, such as a faulty component or wiring issue, is not addressed, the code is likely to reoccur.

6. Is it safe to continue driving with OBDII code U1538 GMC present?

While it may be safe to continue driving with code U1538 GMC present, it is recommended to address the issue promptly to prevent further electrical problems and ensure the proper functioning of essential features like power windows and door locks.

7. How much does it typically cost to repair OBDII code U1538 GMC?

The cost to repair code U1538 GMC can vary depending on the underlying cause of the issue. Repair costs may involve replacing a faulty window switch, repairing damaged wiring, or reprogramming or replacing the Body Control Module, with total expenses ranging from a few hundred to over a thousand dollars.

8. Can a DIY enthusiast fix code U1538 GMC, or is professional assistance recommended?

DIY enthusiasts with automotive repair experience may be able to diagnose and fix code U1538 GMC themselves, especially if they have access to a scan tool and wiring diagrams. However, if the issue is complex or requires specialized tools, professional assistance may be recommended.

9. How long does it typically take to repair OBDII code U1538 GMC?

The time it takes to repair code U1538 GMC can vary depending on the specific cause of the issue and the extent of the repairs needed. Simple fixes like replacing a window switch may take an hour or two, while more complex repairs involving the Body Control Module could take several hours or longer.

10. Are there any preventive measures to avoid encountering code U1538 GMC in the future?

To help prevent code U1538 GMC from occurring in the future, it is essential to regularly inspect and maintain the electrical components in the vehicle, including the power window switches, wiring harnesses, and Body Control Module connections. Promptly addressing any issues or warning signs can help avoid more significant problems down the road.