AutoCodes – GMC – U0255 GMC

U0255 GMC Code - Lost Communication With Info Display Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Info Display Module, Info Display Module harness is open or shorted, Info Display 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: U0255 GMC indicates Lost Communication With Info Display Module.
Common causes: Common causes include Faulty Info Display Module, Info Display Module harness is open or shorted, Info Display 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 1,826

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 Apr 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0255 GMC Description

Modules connected to the 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 modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Info Display Module has not been received.

OBDII Code U0255 GMC - Lost Communication With Info Display Module - AutoCodes.com — U0255 GMC Code - Lost Communication With Info Display Module

What does this mean?

What are the Possible Causes of the DTC U0255 GMC?

Faulty Info Display Module
Info Display Module harness is open or shorted
Info Display Module circuit poor electrical connection

How to Fix the DTC U0255 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 U0255 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.

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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 U0255 GMC Code

1. What are the common symptoms of OBDII code U0255 GMC (Lost Communication With Info Display Module)?

- Common symptoms include a blank or flickering info display screen, loss of audio controls, and malfunctioning climate control settings.

2. What can cause the OBDII code U0255 GMC to appear?

- The code can be triggered by a faulty info display module, damaged wiring, loose connections, or a failing control module.

3. How can I diagnose the issue related to code U0255 GMC?

- Perform a visual inspection of the wiring and connections, check for any loose plugs, and use a diagnostic scanner to pinpoint the communication loss with the info display module.

4. Are there any quick fixes for resolving OBDII code U0255 GMC?

- Quick fixes may include checking and securing all connections, resetting the vehicle's computer system, or replacing a blown fuse related to the info display module.

5. Can I continue driving my vehicle with the U0255 GMC code present?

- It is not recommended to drive the vehicle with the code active, as it may lead to further electrical problems and potential safety hazards.

6. How much does it typically cost to repair the Lost Communication With Info Display Module issue?

- The cost of repair can vary depending on the exact cause of the problem, but it may range from $100 for simple fixes to $500 or more for complex repairs involving module replacement.

7. Is the U0255 GMC code specific to certain GMC models?

- The U0255 code can appear across various GMC models, including trucks, SUVs, and vans, that are equipped with an info display module.

8. Can a DIY enthusiast fix the U0255 GMC code issue at home?

- Depending on the root cause of the problem, DIY enthusiasts with experience in automotive electrical systems may be able to address simple wiring or connection issues themselves.

9. Will resetting the OBDII system clear the U0255 GMC code?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

10. How long does it take to repair the Lost Communication With Info Display Module problem?

- The repair time can vary based on the complexity of the issue and the availability of replacement parts, but it may take anywhere from one hour for basic fixes to a few hours for more involved repairs.