AutoCodes – GMC – P155C 2018 GMC Sierra

P155C 2018 GMC Sierra Code - Cruise Control Resume/Acceleration Switch 2 Circuit

Quick Answer

The Cruise Control Switch is an input to the Body Control Module (BCM). Common causes include Faulty Cruise Control Switch, Cruise Control Switch harness is open or shorted, Cruise Control Switch 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
P155C 2018 GMC Sierra indicates Cruise Control Resume/Acceleration Switch 2 Circuit.
Common causes
Common causes include Faulty Cruise Control Switch, Cruise Control Switch harness is open or shorted, Cruise Control Switch 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 138
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 25, 2024
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Code P155C 2018 GMC Sierra Description

The Cruise Control Switch is an input to the Body Control Module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The Engine Control Module (ECM) receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications.
OBDII Code P155C 2018 GMC Sierra - Cruise Control Resume/Acceleration Switch 2 Circuit - AutoCodes.com
P155C 2018 GMC Sierra Code - Cruise Control Resume/Acceleration Switch 2 Circuit

What are the Possible Causes of the DTC P155C 2018 GMC Sierra?

  • Faulty Cruise Control Switch
  • Cruise Control Switch harness is open or shorted
  • Cruise Control Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC P155C 2018 GMC Sierra?

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 P155C 2018 GMC Sierra 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 P155C 2018 GMC Sierra code?

Need more information on how to fix the P155C 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P155C 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P155C in a 2018 GMC Sierra related to the Cruise Control Resume/Acceleration Switch 2 Circuit?

The common symptoms include malfunctioning cruise control system, inability to resume or accelerate using the cruise control, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P155C in a 2018 GMC Sierra?

The potential 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 OBDII code P155C in a 2018 GMC Sierra related to the Cruise Control Resume/Acceleration Switch 2 Circuit?

Diagnosis involves using an OBDII scanner to retrieve the trouble codes, inspecting the cruise control switches and wiring for any visible damage, and testing the cruise control system components for proper functionality.

4. Is it safe to continue driving with OBDII code P155C in a 2018 GMC Sierra?

It is generally safe to drive with this code, but it is recommended to address the issue promptly to restore the cruise control functionality and prevent any potential long-term damage to the vehicle's systems.

5. How can I repair OBDII code P155C in a 2018 GMC Sierra associated with the Cruise Control Resume/Acceleration Switch 2 Circuit?

Repair options may include replacing the faulty cruise control switch, repairing or replacing damaged wiring or connectors, or recalibrating the cruise control module to resolve the issue.

6. Can a DIY enthusiast fix OBDII code P155C in a 2018 GMC Sierra, or is professional assistance necessary?

Depending on the individual's mechanical skills and access to tools, a DIY enthusiast may be able to address this code by following the manufacturer's repair manual and proper diagnostic procedures. However, professional assistance is recommended if unsure.

7. Are there any temporary solutions to consider for OBDII code P155C in a 2018 GMC Sierra until a permanent repair can be made?

One temporary solution could be manually controlling the vehicle's speed without using the cruise control function until the issue is resolved to avoid potential safety hazards or further damage.

8. How much does it typically cost to repair OBDII code P155C in a 2018 GMC Sierra related to the Cruise Control Resume/Acceleration Switch 2 Circuit?

The cost of repair can vary depending on the specific cause of the issue, the required parts, and labor rates. It is advisable to obtain quotes from different mechanics or dealerships for an accurate estimate.

9. Can OBDII code P155C in a 2018 GMC Sierra cause other problems if left unaddressed?

Leaving this code unaddressed can lead to continued malfunctioning of the cruise control system, potential decreased fuel efficiency, and may trigger other related trouble codes if the underlying issue worsens over time.

10. How long does it typically take to repair OBDII code P155C in a 2018 GMC Sierra related to the Cruise Control Resume/Acceleration Switch 2 Circuit?

The repair time can vary based on the complexity of the issue, availability of parts, and the mechanic's expertise. In some cases, it may take a few hours to a full day to diagnose and repair the problem effectively.

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