P056C 2015 GMC Sierra Code - Cruise Control Cancel Switch 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
- P056C 2015 GMC Sierra indicates Cruise Control Cancel Switch 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.
Code P056C 2015 GMC Sierra Description
What are the Possible Causes of the DTC P056C 2015 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 P056C 2015 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 P056C 2015 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.
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Frequently Asked Questions about P056C 2015 GMC Sierra Code
1. What does the OBDII code P056C mean on a 2015 GMC Sierra?
The P056C code indicates a problem with the Cruise Control Cancel Switch Circuit, which may affect the vehicle's cruise control functionality.
2. What are the common symptoms of the P056C code in a 2015 GMC Sierra?
The most common symptoms include the cruise control not engaging, canceling unexpectedly, or the cruise control system being completely inoperative.
3. What causes the P056C code to appear on a 2015 GMC Sierra?
Potential causes include a faulty cruise control cancel switch, damaged wiring or connectors in the cancel switch circuit, or a malfunctioning brake light switch.
4. How do I diagnose the P056C code in my 2015 GMC Sierra?
Start by using a scan tool to confirm the code, then inspect the wiring and connectors for damage. Test the cruise control cancel switch and brake light switch for proper operation.
5. Can I still drive my 2015 GMC Sierra with the P056C code active?
Yes, the vehicle is still drivable, but cruise control functionality may be limited or unavailable, which could affect convenience during long drives.
6. How do I fix the P056C code on a 2015 GMC Sierra?
Repairs may include replacing the cruise control cancel switch, repairing damaged wiring or connectors, or replacing the brake light switch if it’s faulty.
7. How much does it cost to repair the P056C code on a 2015 GMC Sierra?
The repair cost can range from $50 to $200, depending on whether the issue is with the switch, wiring, or connectors, and if professional labor is required.
8. Can a faulty brake light switch trigger the P056C code?
Yes, since the brake light switch is part of the cruise control cancel circuit, a malfunctioning switch can cause this code to appear.
9. Do I need special tools to fix the P056C code on my 2015 GMC Sierra?
A basic OBDII scanner, multimeter, and standard hand tools are typically sufficient to diagnose and repair this issue.
10. Can a blown fuse cause the P056C code in a 2015 GMC Sierra?
While uncommon, a blown fuse related to the cruise control system or brake lights could contribute to the problem, so it’s worth checking.
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