AutoCodes – GMC – U3012 2017 GMC Sierra

U3012 2017 GMC Sierra Code - Control Module Improper Wake-Up Performance

Quick Answer

The internal fault detection is handled inside the device. 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: U3012 2017 GMC Sierra indicates Control Module Improper Wake-Up 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 298

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 Jul 24, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U3012 2017 GMC Sierra Description

The internal fault detection is handled inside the device. The symptom byte information is for engineering reference only. No external circuit diagnosis is involved. The Diagnostic Trouble Code (DTC) will set when the device has detected an internal malfunction.

OBDII Code U3012 2017 GMC Sierra - Control Module Improper Wake-Up Performance - AutoCodes.com — U3012 2017 GMC Sierra Code - Control Module Improper Wake-Up Performance

What does this mean?

What are the Possible Causes of the DTC U3012 2017 GMC Sierra?

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

How to Fix the DTC U3012 2017 GMC Sierra?

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 U3012 2017 GMC Sierra 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 U3012 2017 GMC Sierra code?

Need more information on how to fix the U3012 2017 GMC Sierra code? Get Access to Factory Service Manuals

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Get the U3012 2017 GMC Sierra 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 U3012 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code U3012 in a 2017 GMC Sierra?

- Common symptoms include intermittent or persistent issues with starting the vehicle, reduced fuel efficiency, and possible illumination of the check engine light.

2. What does the OBDII code U3012 for a 2017 GMC Sierra indicate?

- The code U3012 points to Control Module Improper Wake-Up Performance, suggesting a problem with the vehicle's control module not waking up properly.

3. What are the possible causes of OBDII code U3012 in a 2017 GMC Sierra?

- The code U3012 can be triggered by issues such as a faulty control module, wiring problems, software glitches, or a weak electrical connection.

4. How can I diagnose the cause of OBDII code U3012 in my 2017 GMC Sierra?

- Proper diagnosis typically involves using an OBDII scanner to retrieve the code, checking the control module and related wiring for any visible damage, and conducting a thorough inspection of the electrical connections.

5. Can I still drive my 2017 GMC Sierra with OBDII code U3012 active?

- It is generally not recommended to drive the vehicle with an active U3012 code, as it can lead to further damage and potentially unsafe driving conditions. It's advisable to address the issue promptly.

6. How can I repair OBDII code U3012 in my 2017 GMC Sierra?

- Repairing the U3012 code may involve repairing or replacing the control module, addressing any wiring issues, ensuring proper electrical connections, and updating software as needed.

7. Is it possible to reset OBDII code U3012 on a 2017 GMC Sierra without addressing the underlying issue?

- While it is possible to clear the code temporarily, it is crucial to address the root cause of the U3012 code to prevent it from reoccurring and potentially causing more severe problems.

8. Can a DIY enthusiast fix OBDII code U3012 in a 2017 GMC Sierra?

- Depending on their skill level and access to tools, some DIY enthusiasts may be able to diagnose and address simpler causes of the U3012 code. However, more complex issues may require professional assistance.

9. How much can I expect to pay for repairing OBDII code U3012 in a 2017 GMC Sierra?

- Repair costs for the U3012 code can vary based on the specific cause, parts needed, and labor involved. It's recommended to obtain quotes from trusted mechanics or dealerships for an accurate estimate.

10. Will fixing OBDII code U3012 improve the overall performance of my 2017 GMC Sierra?

- Addressing the U3012 code promptly can help restore the proper functionality of the control module and potentially improve the overall performance and efficiency of your GMC Sierra.