AutoCodes – GMC – U0075 GMC

U0075 GMC Code - Control Module Communication Object Detection CAN Bus Off

Quick Answer

The devices connected to the object high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted. 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
U0075 GMC indicates Control Module Communication Object Detection CAN Bus Off.
Common causes
Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted.
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 1,297
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 19, 2023
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Code U0075 GMC Description

The devices connected to the object high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices when the ignition switch is in any position other than OFF. The object high speed GMLAN serial data bus uses terminating resistors that are in parallel with the object high speed GMLAN (+) and (-) circuits. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.
OBDII Code U0075 GMC - Control Module Communication Object Detection CAN Bus Off - AutoCodes.com
U0075 GMC Code - Control Module Communication Object Detection CAN Bus Off

What are the Possible Causes of the DTC U0075 GMC?

  • Check for more codes
  • Faulty Control Module
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

How to Fix the DTC U0075 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 U0075 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 U0075 GMC code?

Need more information on how to fix the U0075 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0075 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 U0075 GMC Code

1. What are the common symptoms of OBDII code U0075 in a GMC vehicle?

- Common symptoms include issues with the transmission, engine stalling, poor fuel efficiency, and difficulty starting the vehicle.

2. What can cause the OBDII code U0075 in a GMC vehicle?

- The code U0075 is typically caused by a malfunction in the Control Module Communication Object Detection CAN Bus Off system, often due to wiring problems, faulty control modules, or a defective CAN bus network.

3. How can I diagnose the OBDII code U0075 in my GMC?

- Diagnosing code U0075 involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring harness for damage, checking the control modules for proper functioning, and testing the CAN bus network for continuity.

4. Can I still drive my GMC with the U0075 code present?

- It is not recommended to drive your GMC with the U0075 code present, as it can lead to further damage to the vehicle's control modules and potentially affect the overall performance and safety of the vehicle.

5. How can I repair the OBDII code U0075 in my GMC?

- Repairing the U0075 code may involve repairing or replacing damaged wiring, replacing faulty control modules, resetting the codes with an OBDII scanner, and ensuring proper communication within the CAN bus network.

6. Is it possible to reset the U0075 OBDII code in a GMC without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the U0075 code to prevent further problems and ensure the vehicle operates correctly.

7. Can a DIY enthusiast fix the U0075 code issue in a GMC?

- Depending on the DIY enthusiast's skill level and access to tools, some may be able to diagnose and repair the U0075 code in a GMC by following repair guides and utilizing resources like wiring diagrams.

8. How much does it typically cost to repair the U0075 code in a GMC at a professional mechanic or dealership?

- The cost of repairing the U0075 code in a GMC can vary depending on the extent of the issue, with potential costs including labor charges, replacement parts, and diagnostic fees, ranging from a few hundred to over a thousand dollars.

9. Can extreme weather conditions affect the occurrence of the U0075 code in a GMC?

- Extreme weather conditions such as extreme heat or cold can potentially impact the wiring and components associated with the Control Module Communication Object Detection CAN Bus Off system, leading to the occurrence of the U0075 code.

10. Is the U0075 OBDII code specific to GMC vehicles, or can it occur in other car makes?

- The U0075 code related to Control Module Communication Object Detection CAN Bus Off can occur in various vehicle makes and models, not exclusive to GMC vehicles, as it pertains to communication issues within the CAN bus network.

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