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U0248 GMC Code - Lost Communication With Remote Accessory Module

Quick Answer

The U0248 diagnostic trouble code (DTC) for GMC vehicles indicates that there is a communication error with the Remote Accessory Module (RAM). Common causes include Faulty RAM module, Wiring or connector issues, Software glitches in the vehicle's network system. 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
U0248 GMC indicates Lost Communication With Remote Accessory Module.
Common causes
Common causes include Faulty RAM module, Wiring or connector issues, Software glitches in the vehicle's network system.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code U0248 GMC Description

The U0248 diagnostic trouble code (DTC) for GMC vehicles indicates that there is a communication error with the Remote Accessory Module (RAM). The RAM is a component that controls various accessories in the vehicle, such as power windows, door locks, and interior lighting. When communication is lost with the RAM, it can lead to malfunctioning accessories and potentially impact the vehicle's overall performance.

OBDII Code U0248 GMC - Lost Communication With Remote Accessory Module
U0248 GMC Code - Lost Communication With Remote Accessory Module

Common Causes of U0248 GMC

  1. Faulty RAM module
  2. Wiring or connector issues
  3. Software glitches in the vehicle's network system
  4. Electronic interference from aftermarket accessories
  5. Water damage or corrosion in the RAM module

Symptoms of U0248 GMC

  1. Inoperable power windows or door locks
  2. Interior lights not functioning properly
  3. Unresponsive remote key fob
  4. Warning lights on the dashboard related to accessory systems
  5. Random or intermittent issues with accessory operation

How to Fix U0248 GMC

  1. Begin by conducting a thorough diagnostic scan to confirm the U0248 code and identify the specific source of the communication error.
  2. Inspect the wiring harness and connectors for any signs of damage or corrosion, repairing or replacing as necessary.
  3. Test the RAM module for proper functionality and replace it if it is found to be faulty.
  4. Clear the DTC and reset the vehicle's system to ensure proper communication with the RAM.
  5. Conduct a final test drive to verify that the accessories are operating correctly and that the code does not return.

Cost to Fix U0248 GMC

The cost of repairing a U0248 code can vary depending on the specific cause of the communication error. In general, you can expect to pay anywhere from $100 to $500 for parts and labor. However, it's important to note that diagnostic time and labor rates can vary significantly between auto repair shops. It's recommended to obtain quotes from multiple shops to ensure you receive a fair price for the repair.

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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 U0248 GMC Code

1. What are common symptoms of OBDII code U0248 GMC (Lost Communication With Remote Accessory Module)?

- Common symptoms include issues with remote start functionality, keyless entry problems, and malfunctioning accessories controlled by the remote module.

2. What are possible causes of the U0248 GMC trouble code?

- The code U0248 typically indicates a communication problem between the vehicle's onboard diagnostic system and the remote accessory module. Causes may include a faulty module, wiring issues, or a poor connection.

3. How can I diagnose the U0248 code related to lost communication with the remote accessory module?

- Diagnosing the U0248 code involves checking the wiring and connections to the remote accessory module, testing the module itself for malfunctions, and using a scan tool to communicate with the vehicle's computer system.

4. Can a DIY enthusiast repair the U0248 GMC trouble code?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing the U0248 code often requires specialized tools and expertise. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

5. Is it safe to continue driving with the U0248 trouble code present?

- It is generally safe to drive the vehicle with the U0248 code, but it is important to address the underlying communication issue with the remote accessory module to ensure proper functionality of related systems.

6. How much does it typically cost to repair the U0248 GMC trouble code?

- The cost of repairing the U0248 code can vary depending on the underlying cause. Costs may include diagnostic fees, parts replacement, and labor charges, which can range from a hundred to several hundred dollars.

7. Can a dead battery cause the U0248 code to appear?

- A dead or weak battery can sometimes lead to communication errors between modules in the vehicle, potentially triggering the U0248 code. It is advisable to check the battery's condition as part of the diagnostic process.

8. Will resetting the trouble codes make the U0248 code disappear permanently?

- Resetting the trouble codes may temporarily clear the U0248 code, but if the underlying issue with the communication between the vehicle's system and the remote accessory module persists, the code is likely to reappear.

9. Are there any common recalls or technical service bulletins related to the U0248 code in GMC vehicles?

- It is recommended to check with authorized GMC dealerships or online resources for any recalls or technical service bulletins related to the U0248 code in specific GMC models to see if there are known issues or remedies.

10. How can I prevent the U0248 trouble code from occurring in the future?

- To prevent the U0248 code from occurring, it is essential to perform regular vehicle maintenance, check the condition of wiring and connections, and address any communication issues promptly to ensure proper functioning of the remote accessory module.

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