Engine-Codes.com
Engine-Codes – GMC – B3794:61 2016 GMC Sierra

B3794:61 2016 GMC Sierra Code - Cruise Control Function Request Circuit

Quick Answer

The B3794:61 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Cruise Control Function Request Circuit. Common causes include Faulty cruise control switch, Wiring issues, such as damaged or corroded connections, Defective cruise control module. 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
B3794:61 2016 GMC Sierra indicates Cruise Control Function Request Circuit.
Common causes
Common causes include Faulty cruise control switch, Wiring issues, such as damaged or corroded connections, Defective cruise control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B3794:61 2016 GMC Sierra Description

The B3794:61 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Cruise Control Function Request Circuit. This code indicates that there is a malfunction in the circuit responsible for transmitting signals to the cruise control module to activate the cruise control system. The cruise control system allows the driver to set a desired speed for the vehicle to maintain without the need for constant throttle input.

OBDII Code B3794:61 2016 GMC Sierra - Cruise Control Function Request Circuit
B3794:61 2016 GMC Sierra Code - Cruise Control Function Request Circuit

Common Causes of B3794:61 2016 GMC Sierra

  1. Faulty cruise control switch.
  2. Wiring issues, such as damaged or corroded connections.
  3. Defective cruise control module.
  4. Malfunctioning electronic control unit (ECU).
  5. Poor electrical connections or grounds affecting the circuit.

Symptoms of B3794:61 2016 GMC Sierra

  1. Inability to set or maintain a constant speed using the cruise control system.
  2. Cruise control system not engaging or disengaging erratically.
  3. Dashboard warning light, such as the cruise control indicator, illuminated.
  4. Loss of vehicle speed control while cruise control is activated.
  5. Vehicle surging or lurching while cruise control is active.

How to Fix B3794:61 2016 GMC Sierra

  1. Begin by conducting a visual inspection of the cruise control system wiring and connections to identify any visible damage or corrosion. Repair or replace any damaged components.
  2. Test the cruise control switch for proper functionality using a multimeter to check for continuity and proper signal transmission. Replace the switch if necessary.
  3. Use a diagnostic scan tool to retrieve and clear the B3794:61 code from the vehicle's ECU. This will reset the system and allow for further testing.
  4. Test the cruise control module for proper operation by checking input and output signals. Replace the module if it fails to respond or transmit signals correctly.
  5. If the issue persists, consult a professional technician for further diagnosis and potential replacement of the electronic control unit.

Cost to Fix B3794:61 2016 GMC Sierra

The typical repair costs for addressing the B3794:61 Cruise Control Function Request Circuit code can vary depending on the specific cause of the issue. In general, parts such as a cruise control switch or module can range from $50 to $200, while labor costs can add an additional $100 to $200 for diagnosis and repair. Overall, the total repair cost for this issue may range from $150 to $400, excluding any additional taxes or fees.

Need more information about the B3794:61 2016 GMC Sierra code?

Need more information on how to fix the B3794:61 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3794:61 2016 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 B3794:61 2016 GMC Sierra Code

1. What does OBDII code B3794:61 mean on a 2016 GMC Sierra?

Code B3794:61 indicates an issue with the Cruise Control Function Request Circuit, specifically showing "Signal Invalid."

2. What are the common symptoms of code B3794:61 in a GMC Sierra?

Symptoms may include the cruise control not functioning, the cruise control light failing to illuminate, or intermittent operation of the cruise control system.

3. What causes code B3794:61 to appear in the GMC Sierra?

Common causes include faulty wiring, a malfunctioning cruise control switch, issues with the body control module (BCM), or signal interference in the circuit.

4. Can code B3794:61 affect other vehicle systems?

While primarily related to cruise control, it may affect other features that rely on the BCM if the underlying issue involves module communication.

5. How can I diagnose code B3794:61 in a GMC Sierra?

Start by inspecting the cruise control switch, wiring, and connectors for damage or loose connections. Use a scan tool to monitor live data and test the cruise control circuit.

6. What tools are needed to fix code B3794:61?

You may need a multimeter to check circuit continuity and a diagnostic scan tool to clear the code and verify repairs.

7. Is code B3794:61 a serious issue?

It’s not critical for vehicle operation but can be inconvenient if you rely on cruise control for long drives. Addressing the issue promptly is still recommended.

8. How much does it cost to repair code B3794:61?

Costs vary depending on the root cause. Diagnosing and repairing wiring or replacing the cruise control switch may cost $100-$300, while BCM replacement could be more expensive.

9. Can I drive my GMC Sierra with code B3794:61?

Yes, you can drive the vehicle, but the cruise control may not work. Ensure no other related codes affect critical systems.

10. Does clearing code B3794:61 fix the problem permanently?

Clearing the code may temporarily remove it, but if the underlying issue isn’t resolved, the code will return. Proper diagnosis and repair are necessary.

Discuss the causes and fixes for B3794:61 2016 GMC Sierra OBDII Code

Submit a New Comment

Code B3794:61 2016 GMC Sierra comments

No comments found for this page.