AutoCodes – GMC – U0499 GMC

U0499 GMC Code - Invalid Data Received From Telematic Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Telematic Control Module, Telematic Control Module harness is open or shorted, Telematic 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: U0499 GMC indicates Invalid Data Received From Telematic Control Module.
Common causes: Common causes include Faulty Telematic Control Module, Telematic Control Module harness is open or shorted, Telematic 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 771

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 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0499 GMC Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Telematic Control Module causing its integrity to be questioned.

OBDII Code U0499 GMC - Invalid Data Received From Telematic Control Module - AutoCodes.com — U0499 GMC Code - Invalid Data Received From Telematic Control Module

What does this mean?

What are the Possible Causes of the DTC U0499 GMC?

Faulty Telematic Control Module
Telematic Control Module harness is open or shorted
Telematic Control Module circuit poor electrical connection

How to Fix the DTC U0499 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 U0499 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 U0499 GMC 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 U0499 GMC Code

1. What are the common symptoms of OBDII code U0499 in a GMC vehicle?

- Common symptoms include issues with the vehicle's telematics system, such as loss of communication with the control module, malfunction indicator light (MIL) illumination, and potential loss of certain telematics features.

2. What can cause the OBDII code U0499 to appear in a GMC vehicle?

- The code U0499 typically indicates that the Telematic Control Module (TCM) is not receiving valid data. This can be caused by wiring issues, faulty connections, a malfunctioning TCM, or software glitches.

3. How can I diagnose the OBDII code U0499 in my GMC vehicle?

- Diagnosis involves checking the wiring and connections related to the Telematic Control Module, performing a thorough inspection of the module itself, and using a diagnostic scan tool to retrieve specific error codes and data.

4. Can I still drive my GMC vehicle with the U0499 code present?

- While it may be possible to drive the vehicle with the U0499 code, it is recommended to address the underlying issue promptly to prevent potential telematics system failures or safety concerns.

5. How can I repair the U0499 code in my GMC vehicle?

- Repairing the U0499 code may involve fixing wiring issues, repairing or replacing faulty connections, addressing TCM malfunctions, or updating software as per manufacturer recommendations.

6. Is it necessary to visit a dealership to fix the U0499 code in my GMC vehicle?

- While a dealership may have specialized knowledge and tools for GMC vehicles, independent repair shops with experience in diagnosing and repairing telematics systems can also effectively address the U0499 code.

7. Are there any preventative measures I can take to avoid the U0499 code in my GMC vehicle?

- Regularly checking and maintaining the telematics system, ensuring proper wiring connections, and promptly addressing any related issues can help prevent the occurrence of the U0499 code.

8. Can a DIY enthusiast attempt to fix the U0499 code in a GMC vehicle?

- Depending on the individual's experience and knowledge, some DIY enthusiasts may be able to address simple wiring issues or connections related to the U0499 code. However, complex diagnostics and repairs may require professional assistance.

9. Will resetting the OBDII system clear the U0499 code in my GMC vehicle?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the U0499 code is not addressed, the code is likely to reappear upon further diagnostics or driving.

10. How long does it typically take to repair the U0499 code in a GMC vehicle?

- The repair time for the U0499 code can vary depending on the specific cause of the issue, the availability of parts, and the expertise of the technician. Simple fixes may take a few hours, while more complex repairs could take longer.