AutoCodes – GMC – P155C 2016 GMC Sierra

P155C 2016 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 2016 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.

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Code Popularity 149

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 2016 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 2016 GMC Sierra - Cruise Control Resume/Acceleration Switch 2 Circuit - AutoCodes.com — P155C 2016 GMC Sierra Code - Cruise Control Resume/Acceleration Switch 2 Circuit

What does this mean?

What are the Possible Causes of the DTC P155C 2016 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 2016 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 2016 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 2016 GMC Sierra code?

Need more information on how to fix the P155C 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2016 GMC Sierra Code

What does OBDII code P155C mean on a 2016 GMC Sierra?

Code P155C indicates an issue with the Cruise Control Resume/Acceleration Switch 2 Circuit, which is part of the cruise control system.

What are the common symptoms of code P155C in a 2016 GMC Sierra?

Symptoms may include the cruise control not working, the cruise control light not activating, or the system failing to maintain speed.

What causes the P155C code on a GMC Sierra?

Common causes include a faulty cruise control switch, damaged wiring or connectors in the switch circuit, or a malfunction in the vehicle's body control module (BCM).

Can I still drive my 2016 GMC Sierra with the P155C code?

Yes, the vehicle is typically safe to drive, but the cruise control system may be inoperative until the issue is resolved.

How do I diagnose the P155C code on my GMC Sierra?

Diagnosis involves checking the cruise control switch for proper operation, inspecting wiring and connectors for damage, and testing the circuit with a multimeter.

How can I fix the P155C code on my 2016 GMC Sierra?

Repairs may include replacing the cruise control switch, repairing damaged wiring or connectors, or reprogramming or replacing the body control module if necessary.

How much does it cost to fix the P155C code on a GMC Sierra?

Repair costs vary, but replacing the cruise control switch typically costs $100-$300, including parts and labor, depending on your location and repair facility.

Can a P155C code be triggered by a dead battery?

While unlikely, a low or dead battery can sometimes cause electrical issues that may indirectly contribute to the code. Itâ€™s best to confirm the root cause through diagnosis.

Does the P155C code require professional repair?

If youâ€™re comfortable with basic electrical diagnostics, you can attempt the repair yourself. However, professional assistance is recommended if BCM reprogramming or advanced troubleshooting is needed.

Will clearing the P155C code with a scanner fix the problem?

Clearing the code may temporarily remove it, but if the underlying issue isnâ€™t resolved, the code will likely return.