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Engine-Codes – GMC – U1359 GMC

U1359 GMC Code - Lost Communication With Transmission Range Indicator

Quick Answer

The U1359 GMC code indicates that there is a communication issue between the vehicle's engine control module (ECM) and the transmission range indicator. Common causes include Loose or corroded wiring connections between the ECM and transmission range indicator, Faulty transmission range indicator, Malfunctioning ECM. 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
U1359 GMC indicates Lost Communication With Transmission Range Indicator.
Common causes
Common causes include Loose or corroded wiring connections between the ECM and transmission range indicator, Faulty transmission range indicator, Malfunctioning ECM.
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 Sep 14, 2024
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Code U1359 GMC Description

The U1359 GMC code indicates that there is a communication issue between the vehicle's engine control module (ECM) and the transmission range indicator. The transmission range indicator is responsible for displaying the gear position of the transmission, such as Park, Reverse, Neutral, Drive, etc. When communication is lost between the ECM and the transmission range indicator, it can lead to incorrect gear selection, erratic shifting, or the inability to shift gears at all.

OBDII Code U1359 GMC - Lost Communication With Transmission Range Indicator
U1359 GMC Code - Lost Communication With Transmission Range Indicator

Common Causes of U1359 GMC

  1. Loose or corroded wiring connections between the ECM and transmission range indicator.
  2. Faulty transmission range indicator.
  3. Malfunctioning ECM.
  4. Electrical interference or communication bus issues.
  5. Water or moisture intrusion causing damage to electrical components.

Symptoms of U1359 GMC

  1. Incorrect gear display on the transmission range indicator.
  2. Erratic shifting or difficulty shifting gears.
  3. Harsh or delayed transmission engagement.
  4. Transmission slipping or jerking during acceleration.
  5. Vehicle stuck in a particular gear.

How to Fix U1359 GMC

  1. Begin by inspecting the wiring harness and connectors between the ECM and transmission range indicator for any signs of damage, corrosion, or looseness. Repair or replace any damaged wiring as needed.
  2. Check the transmission range indicator for proper operation and replace it if it is found to be faulty.
  3. Perform a diagnostic scan to check for any stored fault codes in the ECM and clear them. Resetting the system may resolve the communication issue.
  4. If the problem persists, further diagnosis may be required to pinpoint the exact cause of the communication failure, such as testing the ECM for proper function or checking for electrical interference.
  5. Once the root cause is identified, repair or replace the faulty components as necessary to restore communication between the ECM and transmission range indicator.

Cost to Fix U1359 GMC

The typical repair costs for addressing the U1359 GMC code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair could range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost could amount to anywhere from $200 to $800, but it's essential to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the vehicle's make and model, as well as the local labor rates. Keep in mind that rates may vary, so it's advisable to shop around for the best deal.

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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 U1359 GMC Code

1. What are the common symptoms of OBDII code U1359 GMC (Lost Communication With Transmission Range Indicator)?

- Common symptoms include issues with shifting gears, incorrect gear display on the dashboard, and the transmission being stuck in one gear.

2. What are the possible causes of OBDII code U1359 GMC?

- The code U1359 GMC can be caused by a faulty transmission range indicator switch, damaged wiring or connectors, or a communication error within the vehicle's network.

3. How is OBDII code U1359 GMC diagnosed?

- The code U1359 GMC can be diagnosed using a professional OBDII scanner to retrieve the stored code and further diagnostic testing to pinpoint the exact cause, such as testing the transmission range indicator switch and checking the wiring connections.

4. Can I continue driving my vehicle with OBDII code U1359 GMC present?

- It is not recommended to drive your vehicle with the U1359 code present, as it can lead to transmission issues and potential safety hazards. It's best to address the issue promptly.

5. How can I repair OBDII code U1359 GMC?

- Repairing the U1359 code typically involves replacing a faulty transmission range indicator switch, repairing damaged wiring or connectors, or addressing any communication issues within the vehicle's network.

6. Will resetting the OBDII code U1359 GMC make it go away permanently?

- Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed, the code is likely to return. It's essential to diagnose and repair the root cause.

7. Is OBDII code U1359 GMC a common issue in GMC vehicles?

- The U1359 code is not extremely common, but it can occur in GMC vehicles, especially in older models or those with high mileage. Proper maintenance and timely repairs can help prevent this issue.

8. Can a DIY enthusiast repair OBDII code U1359 GMC at home?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address the U1359 code at home by replacing the transmission range indicator switch or checking the wiring. However, professional diagnosis is recommended for accurate repairs.

9. How much does it typically cost to repair OBDII code U1359 GMC at a mechanic or dealership?

- The cost of repairing the U1359 code can vary depending on the exact cause of the issue, labor rates, and parts prices. It's advisable to get quotes from different mechanics or dealerships to compare prices.

10. Can OBDII code U1359 GMC lead to other related issues if left unaddressed?

- If left unaddressed, the U1359 code can lead to further transmission problems, incorrect gear shifting, and potential safety risks while driving. It's crucial to resolve the issue promptly.

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