AutoCodes – GMC – U0076 GMC

U0076 GMC Code - Control Module Communication Powertrain Sensor 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: U0076 GMC indicates Control Module Communication Powertrain Sensor 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 846

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 20, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0076 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 U0076 GMC - Control Module Communication Powertrain Sensor CAN Bus Off - AutoCodes.com — U0076 GMC Code - Control Module Communication Powertrain Sensor CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U0076 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 U0076 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 U0076 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 U0076 GMC code?

Need more information on how to fix the U0076 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0076 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

U0076 2014 GMC Sierra — Control Module Communication Powertrain Sensor CAN Bus Off
U0076 2015 GMC Sierra — Control Module Communication Powertrain Sensor CAN Bus Off
U0076 2016 GMC Sierra — Control Module Communication Powertrain Sensor CAN Bus Off
U0076 2017 GMC Sierra — Control Module Communication Powertrain Sensor CAN Bus Off
U0076 2018 GMC Sierra — Control Module Communication Powertrain Sensor CAN Bus Off

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 U0076 GMC Code

1. What does the OBDII code U0076 GMC indicate?

The code U0076 GMC indicates a communication problem with the Powertrain Control Module (PCM) sensor on the Controller Area Network (CAN) bus.

2. What are the common symptoms of U0076 GMC code?

Common symptoms of the U0076 GMC code include engine stalling, rough idling, poor acceleration, and the illumination of the Check Engine Light.

3. What are the possible causes of the U0076 GMC code?

Possible causes of the U0076 GMC code include damaged wiring or connectors, faulty PCM sensor, CAN bus communication issues, or a malfunctioning PCM.

4. How can I diagnose the U0076 GMC code?

Diagnosing the U0076 GMC code involves using an OBDII scanner to retrieve the code and performing a thorough inspection of the wiring, connectors, and PCM sensor for any visible damage or corrosion.

5. How can I repair the U0076 GMC code?

To repair the U0076 GMC code, you may need to repair or replace damaged wiring or connectors, replace the faulty PCM sensor, or address any CAN bus communication problems. It's recommended to consult a professional mechanic for accurate diagnosis and repair.

6. Can I drive my vehicle with the U0076 GMC code?

It is not recommended to drive your vehicle with the U0076 GMC code present, as it can lead to further damage to the engine or other components. It's best to address the issue promptly to avoid potential safety hazards.

7. How much does it cost to fix the U0076 GMC code?

The cost to fix the U0076 GMC code can vary depending on the underlying cause of the issue, the extent of the repairs needed, and the labor rates of the repair shop. It's advisable to get multiple quotes from different mechanics to compare prices.

8. Is the U0076 GMC code a common issue in GMC vehicles?

The U0076 GMC code is not as common as some other OBDII codes, but it can still occur in GMC vehicles with CAN bus communication systems. Proper maintenance and timely repairs can help prevent this code from appearing.

9. Can a DIY enthusiast repair the U0076 GMC code?

While some DIY enthusiasts may be able to diagnose and repair simple wiring or connector issues related to the U0076 GMC code, dealing with PCM sensor or CAN bus communication problems may require advanced diagnostic tools and expertise. It's best to seek professional help for complex repairs.

10. How can I prevent the U0076 GMC code from occurring again?

To prevent the U0076 GMC code from occurring again, it's important to conduct regular maintenance checks, address any wiring or connector issues promptly, and follow the manufacturer's recommended service intervals for your GMC vehicle.