AutoCodes – GMC – U0075 2018 GMC Sierra

U0075 2018 GMC Sierra 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 2018 GMC Sierra 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 167

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 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0075 2018 GMC Sierra 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 2018 GMC Sierra - Control Module Communication Object Detection CAN Bus Off - AutoCodes.com — U0075 2018 GMC Sierra Code - Control Module Communication Object Detection CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U0075 2018 GMC Sierra?

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 2018 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 U0075 2018 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 U0075 2018 GMC Sierra 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 U0075 2018 GMC Sierra Code

1. What does the OBDII code U0075 mean on a 2018 GMC Sierra?

U0075 indicates a communication issue on the Control Area Network (CAN) bus, specifically related to the Control Module Communication Object Detection system being "off."

2. What are the common symptoms of code U0075 in a 2018 GMC Sierra?

Symptoms may include warning lights on the dashboard (e.g., ABS or traction control), failure of driver-assist systems like blind-spot monitoring, or intermittent communication errors between modules.

3. What causes the U0075 code to appear in a 2018 GMC Sierra?

Common causes include a damaged CAN bus wiring harness, faulty control modules, loose or corroded connectors, or a software issue requiring a module reprogramming.

4. Is it safe to drive a 2018 GMC Sierra with a U0075 code?

It depends on the severity of the malfunction. If critical safety or driver-assist systems are affected, itâ€™s best to address the issue as soon as possible to ensure safe operation.

5. How do I diagnose the U0075 code on my 2018 GMC Sierra?

Start by checking for loose or corroded wiring and connectors in the CAN bus system. Use a scan tool to verify communication between modules and identify possible faults.

6. Can a software update fix the U0075 code on a GMC Sierra?

Yes, in some cases, a software update or reprogramming of the affected control module may resolve communication issues causing the U0075 code.

7. What tools are needed to troubleshoot the U0075 code?

Youâ€™ll need a professional-grade OBDII scan tool capable of reading and diagnosing CAN bus communication errors, along with a multimeter to check wiring continuity.

8. How much does it cost to repair the U0075 code on a 2018 GMC Sierra?

Repair costs vary based on the issue. Wiring repairs or connector cleaning may cost $100-$300, while replacing a faulty module could range from $500 to $1,000, including labor.

9. Can a dead battery trigger the U0075 code in a 2018 GMC Sierra?

Yes, a weak or failing battery can cause voltage fluctuations that disrupt CAN bus communication, potentially triggering the U0075 code.

10. What modules are typically involved in the U0075 code for a GMC Sierra?

The code often involves modules related to object detection systems, such as blind-spot monitoring or rear cross-traffic alert, but all modules on the CAN bus should be inspected.