AutoCodes – GMC – P155C GMC

P155C GMC 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 GMC 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.

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Code Popularity 635

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P155C GMC 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 GMC - Cruise Control Resume/Acceleration Switch 2 Circuit - AutoCodes.com — P155C GMC Code - Cruise Control Resume/Acceleration Switch 2 Circuit

What does this mean?

What are the Possible Causes of the DTC P155C GMC?

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 GMC?

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 GMC 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 GMC code?

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

Need Help with the Code?

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

Information for Specific GMC Models

P155C 2014 GMC Sierra — Cruise Control Resume/Acceleration Switch 2 Circuit
P155C 2015 GMC Sierra — Cruise Control Resume/Acceleration Switch 2 Circuit
P155C 2016 GMC Sierra — Cruise Control Resume/Acceleration Switch 2 Circuit
P155C 2017 GMC Sierra — Cruise Control Resume/Acceleration Switch 2 Circuit
P155C 2018 GMC Sierra — Cruise Control Resume/Acceleration Switch 2 Circuit

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 GMC Code

1. What are the common symptoms of OBDII code P155C GMC?

The common symptoms of code P155C GMC include inoperative cruise control, inability to resume speed while driving, and issues with accelerating using the cruise control system.

2. What does the OBDII code P155C GMC indicate?

OBDII code P155C GMC indicates a fault in the Cruise Control Resume/Acceleration Switch 2 Circuit.

3. What are the possible causes of OBDII code P155C GMC?

Possible causes of code P155C GMC include a faulty cruise control resume/acceleration switch, damaged wiring or connectors in the circuit, or a malfunctioning cruise control module.

4. How can I diagnose the cause of OBDII code P155C GMC?

Diagnosing code P155C GMC involves inspecting the cruise control resume/acceleration switch, checking the wiring and connectors for any damage, and testing the cruise control module for proper functionality.

5. Can I still drive my vehicle with OBDII code P155C GMC?

While it may be safe to drive your vehicle with code P155C GMC, it is recommended to address the issue promptly to avoid any potential safety hazards or further damage to the cruise control system.

6. How can I repair OBDII code P155C GMC?

To repair code P155C GMC, you may need to replace the faulty cruise control resume/acceleration switch, repair any damaged wiring or connectors, or recalibrate the cruise control module as needed.

7. Is it possible to reset OBDII code P155C GMC without repairs?

While resetting the code may temporarily clear the error, it is not recommended to do so without addressing the underlying issue, as the problem may persist and affect the functionality of the cruise control system.

8. Can a DIY enthusiast fix OBDII code P155C GMC?

Depending on your skill level and access to tools, a DIY enthusiast may be able to diagnose and repair code P155C GMC by following the manufacturer's service manual or seeking guidance from automotive resources.

9. How much does it cost to fix OBDII code P155C GMC at a repair shop?

The cost of fixing code P155C GMC at a repair shop can vary depending on the specific cause of the issue, the labor rates in your area, and the cost of any parts that need to be replaced. It is advisable to get a few quotes from different shops.

10. Will fixing OBDII code P155C GMC require a trip to the dealership?

While some complex repairs may require specialized tools or expertise available at a dealership, many independent repair shops should be able to diagnose and repair code P155C GMC effectively.