AutoCodes – GMC – C1116 2014 GMC Sierra

C1116 2014 GMC Sierra Code - Manual Trailer Brake Apply Request Signal 1 Malfunction

Quick Answer

The trailer brake control system has a control panel with the trailer gain and manual apply switches. Common causes include Faulty Trailer Brake Control Switch, Trailer Brake Control Switch harness is open or shorted, Trailer Brake 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: C1116 2014 GMC Sierra indicates Manual Trailer Brake Apply Request Signal 1 Malfunction.
Common causes: Common causes include Faulty Trailer Brake Control Switch, Trailer Brake Control Switch harness is open or shorted, Trailer Brake 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 332

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 Jul 18, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1116 2014 GMC Sierra Description

The trailer brake control system has a control panel with the trailer gain and manual apply switches. The switches are located on the instrument panel to the left of the steering column. The control panel and switches allow you to adjust the amount of output, referred to as trailer gain, available to the electric trailer brakes and allow you to manually apply the trailer brakes. The trailer brake control panel and switches are used along with the trailer brake display page on the driver information center to adjust and display power output to the trailer brakes.

OBDII Code C1116 2014 GMC Sierra - Manual Trailer Brake Apply Request Signal 1 Malfunction - AutoCodes.com — C1116 2014 GMC Sierra Code - Manual Trailer Brake Apply Request Signal 1 Malfunction

What does this mean?

What are the Possible Causes of the DTC C1116 2014 GMC Sierra?

Faulty Trailer Brake Control Switch
Trailer Brake Control Switch harness is open or shorted
Trailer Brake Control Switch circuit poor electrical connection
Faulty Chassis Control Module-Auxiliary

How to Fix the DTC C1116 2014 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 C1116 2014 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 C1116 2014 GMC Sierra code?

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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 C1116 2014 GMC Sierra Code

What does the OBDII code C1116 mean for a 2014 GMC Sierra?

The code C1116 indicates a malfunction in the Manual Trailer Brake Apply Request Signal 1, which is part of the trailer brake control system.

What are common symptoms of code C1116 in a 2014 GMC Sierra?

Symptoms may include a trailer brake system warning on the dashboard, reduced or no trailer brake functionality, or issues activating the manual trailer brake.

What causes the C1116 code in a 2014 GMC Sierra?

Common causes include a faulty trailer brake control switch, damaged wiring or connectors in the trailer brake system, or a malfunction in the brake control module.

Can I still tow a trailer with code C1116 active?

While towing may still be possible, the trailer brake system may not function properly, increasing the risk of unsafe braking conditions.

How do I diagnose code C1116 on a 2014 GMC Sierra?

Diagnosis typically involves inspecting the trailer brake control switch, checking for damaged wiring or connectors, and using a scan tool to test the brake control module functionality.

How can the C1116 code be fixed?

Repairs may include replacing the trailer brake control switch, repairing or replacing damaged wiring, or recalibrating or replacing the brake control module.

Is the C1116 code a common issue for the 2014 GMC Sierra?

Itâ€™s not extremely common but can occur if the trailer brake system components are worn or damaged over time.

Can I clear the C1116 code without fixing the issue?

Clearing the code without addressing the root cause may temporarily remove the warning but does not resolve the underlying problem, and the code is likely to return.

How much does it cost to repair a C1116 code on a 2014 GMC Sierra?

Repair costs vary based on the issue but typically range from $100 to $300 for minor wiring repairs or switch replacements and can be higher if the brake control module requires replacement.

Do I need professional help to fix code C1116 on my 2014 GMC Sierra?

While some DIY repairs are possible, professional diagnosis and repair may be necessary for complex issues involving the brake control module or extensive wiring damage.