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C038D 2017 GMC Sierra Code - Range Actuator Position Not Learned

Quick Answer

The diagnostic trouble code C038D on a 2017 GMC Sierra indicates that the Range Actuator Position has not been learned by the vehicle's computer system. Common causes include Faulty range actuator, Electrical connection issues, Software glitch in the vehicle's computer 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
C038D 2017 GMC Sierra indicates Range Actuator Position Not Learned.
Common causes
Common causes include Faulty range actuator, Electrical connection issues, Software glitch in the vehicle's computer 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 C038D 2017 GMC Sierra Description

The diagnostic trouble code C038D on a 2017 GMC Sierra indicates that the Range Actuator Position has not been learned by the vehicle's computer system. This means that the vehicle's transmission may not be able to shift properly, leading to issues with performance and drivability. The Range Actuator is responsible for controlling the transmission's gear selection based on the driver's input and the vehicle's operating conditions. If the position of the actuator is not learned by the vehicle's system, it can result in incorrect gear selection, harsh shifting, or even the transmission getting stuck in a particular gear.

OBDII Code C038D 2017 GMC Sierra - Range Actuator Position Not Learned
C038D 2017 GMC Sierra Code - Range Actuator Position Not Learned

Common Causes of C038D 2017 GMC Sierra

  1. Faulty range actuator
  2. Electrical connection issues
  3. Software glitch in the vehicle's computer system
  4. Wiring harness damage
  5. Mechanical issues within the transmission

Symptoms of C038D 2017 GMC Sierra

  1. Harsh or delayed shifting
  2. Incorrect gear selection
  3. Transmission slipping
  4. Check engine light illuminated
  5. Reduced fuel efficiency

How to Fix C038D 2017 GMC Sierra

  1. Perform a diagnostic scan to confirm the C038D code and identify the root cause of the issue.
  2. Inspect the range actuator and its electrical connections for any signs of damage or corrosion.
  3. Reset the range actuator position and relearn it using a professional diagnostic tool.
  4. Check the transmission fluid level and condition, topping up or replacing as necessary.
  5. Test drive the vehicle to ensure proper shifting and transmission operation after the repair.

Cost to Fix C038D 2017 GMC Sierra

The cost of repairing the Range Actuator Position Not Learned issue on a 2017 GMC Sierra can vary depending on the specific cause of the problem. In general, the parts required for this repair, such as a new range actuator or wiring harness, can range from $200 to $500. Labor costs for the repair can add an additional $100 to $300, considering the complexity of the repair and the time required. It's important to keep in mind that labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple shops to find the best price.

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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 C038D 2017 GMC Sierra Code

1. What does the OBDII code C038D mean for a 2017 GMC Sierra?

The code C038D indicates a "Range Actuator Position Not Learned" error in the transmission system of the 2017 GMC Sierra.

2. What are the common symptoms of the Range Actuator Position Not Learned issue in a GMC Sierra?

Common symptoms of this issue may include rough shifting, hesitation when changing gears, and the transmission not responding properly to driver inputs.

3. What are the possible causes of the Range Actuator Position Not Learned error in a 2017 GMC Sierra?

Possible causes of this error include a faulty range actuator, damaged wiring or connectors in the transmission system, or a software issue in the vehicle's computer system.

4. How can I diagnose the Range Actuator Position Not Learned problem in my 2017 GMC Sierra?

Diagnosing this issue typically involves using a professional OBDII scanner to retrieve the specific trouble code, checking the transmission fluid level and condition, and inspecting the range actuator and its connections for any visible damage.

5. Can I continue driving my GMC Sierra with the C038D code present?

It is not recommended to continue driving your GMC Sierra with the C038D code present, as it can lead to further damage to the transmission system and potentially compromise vehicle safety.

6. How can I repair the Range Actuator Position Not Learned issue in my 2017 GMC Sierra?

Repairing this issue may involve recalibrating the range actuator, repairing or replacing damaged wiring or connectors, updating the vehicle's software, or seeking assistance from a qualified mechanic.

7. Is it possible to reset the C038D trouble code in a 2017 GMC Sierra?

While you can clear the trouble code temporarily with an OBDII scanner, it is essential to address the underlying issue causing the Range Actuator Position Not Learned error to prevent it from reoccurring.

8. Will the Range Actuator Position Not Learned problem affect the vehicle's performance?

Yes, the Range Actuator Position Not Learned issue can affect the performance of the vehicle by causing transmission-related issues like improper shifting, reduced fuel efficiency, and potential drivability problems.

9. Can a DIY enthusiast fix the Range Actuator Position Not Learned problem in a 2017 GMC Sierra?

Depending on your level of automotive expertise and access to tools, a DIY enthusiast may be able to address simple causes of the C038D code, such as checking and cleaning connectors or resetting the range actuator position with guidance from a repair manual.

10. How much does it cost to repair the Range Actuator Position Not Learned issue in a 2017 GMC Sierra?

The cost of repairing the C038D code can vary widely depending on the specific cause of the issue, the need for parts replacement, and whether you choose to DIY or seek professional help. Estimates from mechanics or dealerships can provide more accurate pricing information.

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