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Engine-Codes – GMC – P155C 2017 GMC Sierra

P155C 2017 GMC Sierra Code - Cruise Control Resume/Acceleration Switch 2 Circuit

Quick Answer

The P155C diagnostic trouble code (DTC) for a 2017 GMC Sierra pertains to the Cruise Control Resume/Acceleration Switch 2 Circuit. Common causes include Faulty cruise control switch, Wiring issues or shorts in the Cruise Control Resume/Acceleration Switch 2 Circuit, Defective cruise control module. 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
P155C 2017 GMC Sierra indicates Cruise Control Resume/Acceleration Switch 2 Circuit.
Common causes
Common causes include Faulty cruise control switch, Wiring issues or shorts in the Cruise Control Resume/Acceleration Switch 2 Circuit, Defective cruise control module.
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 12, 2024
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Code P155C 2017 GMC Sierra Description

The P155C diagnostic trouble code (DTC) for a 2017 GMC Sierra pertains to the Cruise Control Resume/Acceleration Switch 2 Circuit. This code indicates that there is a malfunction in the circuit responsible for the cruise control system's resume and acceleration functions.

OBDII Code P155C 2017 GMC Sierra - Cruise Control Resume/Acceleration Switch 2 Circuit
P155C 2017 GMC Sierra Code - Cruise Control Resume/Acceleration Switch 2 Circuit

Common Causes of P155C 2017 GMC Sierra

  1. Faulty cruise control switch
  2. Wiring issues or shorts in the Cruise Control Resume/Acceleration Switch 2 Circuit
  3. Defective cruise control module
  4. Electronic control unit (ECU) malfunctions
  5. Corrosion or damage to electrical connections

Symptoms of P155C 2017 GMC Sierra

  1. Inoperative cruise control system
  2. Inability to resume or accelerate set speed while in cruise control mode
  3. Illumination of the check engine light
  4. Decreased fuel efficiency due to manual speed control
  5. Difficulty maintaining a constant speed on the highway

How to Fix P155C 2017 GMC Sierra

  1. Begin by conducting a thorough diagnosis of the cruise control system to pinpoint the exact cause of the issue.
  2. Inspect the Cruise Control Resume/Acceleration Switch 2 Circuit for any signs of damage, corrosion, or loose connections.
  3. Test the cruise control switch for proper functionality and replace it if necessary.
  4. Check the wiring associated with the circuit for any shorts or breaks, repairing or replacing damaged sections as needed.
  5. Clear the fault codes from the vehicle's computer and test the cruise control system to ensure proper operation.

Cost to Fix P155C 2017 GMC Sierra

The cost of repairing the Cruise Control Resume/Acceleration Switch 2 Circuit can vary depending on the specific cause of the issue and the labor rates in your area. Generally, the parts required for this repair, such as a new cruise control switch or wiring components, may range from $50 to $200. The labor costs can add an additional $100 to $300, considering the complexity of diagnosing and fixing electrical issues. Overall, the total repair cost for addressing the P155C code in a 2017 GMC Sierra could fall within the range of $150 to $500. However, it's recommended to obtain a detailed quote from a reputable auto repair shop that factors in the specific diagnosis time and labor rates in your location.

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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 P155C 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P155C in a 2017 GMC Sierra related to the Cruise Control Resume/Acceleration Switch 2 Circuit?

The common symptoms include the cruise control system not working properly, the inability to resume or accelerate using the cruise control, and a malfunction indicator light (MIL) illuminating on the dashboard.

2. What are the possible causes of OBDII code P155C in a 2017 GMC Sierra?

Possible causes of this code may include a faulty cruise control resume/acceleration switch, damaged wiring or connectors in the cruise control system, or a malfunctioning cruise control module.

3. How can I diagnose the Cruise Control Resume/Acceleration Switch 2 Circuit issue in my 2017 GMC Sierra?

Diagnosing this issue typically involves using a scan tool to retrieve the OBDII trouble code, checking the cruise control switch for proper operation, and inspecting the wiring and connectors for any visible damage.

4. Can I still drive my 2017 GMC Sierra with OBDII code P155C present?

While it may be safe to drive the vehicle with this code present, it is recommended to address the issue promptly to ensure the proper functioning of the cruise control system.

5. What are some repair tips for fixing OBDII code P155C in a 2017 GMC Sierra?

Repair tips may include checking and replacing the cruise control resume/acceleration switch if necessary, repairing any damaged wiring or connectors, and clearing the trouble code with a scan tool after the repairs are completed.

6. Is it possible to reset OBDII code P155C in a 2017 GMC Sierra without making any repairs?

While you can clear the code with a scan tool, it is essential to address the underlying issue causing the code to prevent it from reoccurring.

7. Are there any safety concerns associated with OBDII code P155C in a 2017 GMC Sierra?

Since this code relates to the cruise control system, there may be safety implications if the cruise control is not functioning correctly. It is recommended to address the issue promptly to ensure safe driving conditions.

8. How much does it typically cost to repair OBDII code P155C in a 2017 GMC Sierra?

The cost of repairing this code can vary depending on the exact cause of the issue, but it may involve replacement parts, labor costs, and diagnostic fees from a professional mechanic.

9. Can a DIY enthusiast with automotive knowledge fix OBDII code P155C in a 2017 GMC Sierra?

Depending on the individual's skill level and access to tools, a knowledgeable DIY enthusiast may be able to diagnose and repair this code. However, if unsure, it is recommended to seek professional help.

10. Will OBDII code P155C in a 2017 GMC Sierra affect the overall performance of the vehicle?

While the code may not directly impact the vehicle's drivability, it can affect the functionality of the cruise control system, which may be inconvenient for some drivers.

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