AutoCodes – GMC – U3508 GMC

U3508 GMC Code - Control Module Input Power 'C' 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: U3508 GMC indicates Control Module Input Power 'C' 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.

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Code Popularity 957

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 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U3508 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 U3508 GMC - Control Module Input Power 'C' Circuit Range/Performance - AutoCodes.com — U3508 GMC Code - Control Module Input Power 'C' Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC U3508 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 U3508 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 U3508 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 U3508 GMC code?

Need more information on how to fix the U3508 GMC code? Get Access to Factory Service Manuals

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 U3508 GMC Code

1. What are the common symptoms of OBDII code U3508 GMC?

- Common symptoms include rough engine running, reduced power, stalling, and illuminated Check Engine Light.

2. What could cause the OBDII code U3508 GMC to trigger?

- Possible causes include a faulty control module, wiring issues, poor electrical connections, or a malfunctioning power supply.

3. How can I diagnose the Control Module Input Power 'C' Circuit issue?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific trouble code and then inspecting the control module, related wiring, and power supply components.

4. Can I drive my vehicle with the U3508 GMC trouble code present?

- It is not recommended to drive the vehicle with this code present as it can lead to further damage and potential safety risks. Seek professional help to diagnose and repair the issue.

5. What are some basic repair tips for resolving the Control Module Input Power 'C' Circuit Range/Performance problem?

- Basic repair tips include checking and repairing any damaged wiring, ensuring proper electrical connections, and testing the control module for functionality.

6. How much does it typically cost to repair the U3508 GMC trouble code?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay for diagnostic time, parts replacement, and labor. It's best to get a few quotes from reputable mechanics.

7. Can a DIY enthusiast fix the U3508 GMC trouble code at home?

- While some basic troubleshooting and repairs can be done at home, diagnosing and fixing complex electrical issues like this code may require professional expertise and specialized tools.

8. Is it safe to reset the trouble code using an OBDII scanner?

- It's generally safe to clear the code temporarily to see if it returns. However, it's crucial to address the root cause of the issue to prevent ongoing problems.

9. Will the U3508 GMC trouble code cause damage to other vehicle components if left unresolved?

- Ignoring this code can lead to further electrical system issues, potential control module damage, and overall poor vehicle performance. Prompt diagnosis and repair are recommended.

10. How long does it typically take to repair the Control Module Input Power 'C' Circuit Range/Performance issue?

- Repair times can vary based on the complexity of the problem and availability of parts. It's best to consult with a mechanic for a more accurate estimate of repair time.