AutoCodes – GMC – U3504 GMC

U3504 GMC Code - Control Module Input Power 'B' Circuit Range/Performance

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, Control Module 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
U3504 GMC indicates Control Module Input Power 'B' Circuit Range/Performance.
Common causes
Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, Control Module 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 579
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 18, 2020
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Code U3504 GMC Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. With the ignition is ON, the Diagnostic Trouble Code (DTC) will set when the control module or sensor detects a system voltage of less than approximately 9 V for approximately 5 s.
OBDII Code U3504 GMC - Control Module Input Power 'B' Circuit Range/Performance - AutoCodes.com
U3504 GMC Code - Control Module Input Power 'B' Circuit Range/Performance

What are the Possible Causes of the DTC U3504 GMC?

  • Faulty Control Module setting the code
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

How to Fix the DTC U3504 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 U3504 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 U3504 GMC code?

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Need Help with the 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 U3504 GMC Code

1. What are the common symptoms of OBDII code U3504 in a GMC vehicle?

- Common symptoms include issues with engine performance, such as reduced power, stalling, or rough idling. The vehicle may also experience problems with starting or display warning lights on the dashboard.

2. What could cause the OBDII code U3504 to trigger in a GMC vehicle?

- The code U3504 typically triggers due to a malfunction in the Control Module Input Power 'B' circuit. This could be caused by wiring issues, a faulty control module, or a poor connection in the circuit.

3. How can I diagnose the OBDII code U3504 in my GMC vehicle?

- Diagnosing the code usually involves using a diagnostic scanner to retrieve the specific fault code. A thorough inspection of the wiring, connectors, and control module associated with the Input Power 'B' circuit is also necessary.

4. Can I continue driving my GMC vehicle with the OBDII code U3504 present?

- It is not recommended to continue driving the vehicle with the U3504 code present, as it can lead to further damage and potential safety hazards. It is best to address the underlying issue promptly.

5. What are some repair tips for fixing the OBDII code U3504 in a GMC vehicle?

- Repair tips include checking for loose or damaged wiring, ensuring proper connections in the circuit, and testing the control module for functionality. It may be necessary to replace components that are faulty or damaged.

6. Is it possible to reset the OBDII code U3504 in a GMC vehicle without fixing the underlying issue?

- While it is possible to clear the code temporarily with a diagnostic scanner, the underlying issue causing the code will persist. It is crucial to address the root cause of the problem to prevent the code from reoccurring.

7. How much does it typically cost to repair the OBDII code U3504 in a GMC vehicle?

- The cost of repairing the U3504 code can vary depending on the specific issue causing the code, the extent of repairs needed, and labor costs. It is advisable to consult a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast with basic automotive knowledge fix the OBDII code U3504 in a GMC vehicle?

- While some DIY enthusiasts may be able to diagnose and repair simple wiring issues associated with the U3504 code, more complex problems may require professional expertise. It is important to assess one's skills and capabilities before attempting repairs.

9. How long does it typically take to repair the OBDII code U3504 in a GMC vehicle?

- The repair time for the U3504 code can vary depending on the complexity of the underlying issue and the availability of parts. Simple fixes may take a few hours, while more involved repairs could take longer.

10. Are there any preventive measures to avoid the OBDII code U3504 in a GMC vehicle?

- Regular maintenance, such as checking and cleaning electrical connections, inspecting wiring for damage, and addressing any warning signs promptly, can help prevent issues that may trigger the U3504 code.

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