Engine-Codes.com
Engine-Codes – GMC – B3794 GMC

B3794 GMC Code - Cruise Control Function Request Circuit

Quick Answer

The B3794 diagnostic trouble code (DTC) for GMC vehicles refers to a Cruise Control Function Request Circuit issue. Common causes include Faulty cruise control module, Defective cruise control switches on the steering wheel, Damaged wiring or connectors in the cruise control circuit. 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 GMC indicates Cruise Control Function Request Circuit.
Common causes
Common causes include Faulty cruise control module, Defective cruise control switches on the steering wheel, Damaged wiring or connectors in the cruise control circuit.
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 27, 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 GMC Description

The B3794 diagnostic trouble code (DTC) for GMC vehicles refers to a Cruise Control Function Request Circuit issue. This code indicates that there is a malfunction in the circuit responsible for transmitting signals between the cruise control module and other relevant components. The cruise control system allows the driver to set a desired speed for the vehicle to maintain automatically, enhancing driving comfort and reducing fatigue on long trips.

OBDII Code B3794 GMC - Cruise Control Function Request Circuit
B3794 GMC Code - Cruise Control Function Request Circuit

Common Causes of B3794 GMC

  1. Faulty cruise control module
  2. Defective cruise control switches on the steering wheel
  3. Damaged wiring or connectors in the cruise control circuit
  4. Malfunctioning throttle position sensor
  5. Failed brake switch or vehicle speed sensor

Symptoms of B3794 GMC

  1. Inoperative cruise control system
  2. Cruise control engaging intermittently
  3. Sudden acceleration or deceleration when cruise control is activated
  4. Cruise control not maintaining set speed
  5. Illumination of the check engine light

How to Fix B3794 GMC

  1. Begin by performing a thorough inspection of the cruise control system components, including the cruise control module, switches, wiring, throttle position sensor, brake switch, and vehicle speed sensor.
  2. Use a multimeter to test the continuity and voltage of the cruise control circuit to identify any open circuits or shorts.
  3. Replace any faulty components identified during the inspection, such as a defective cruise control module, switches, or sensors.
  4. Repair or replace damaged wiring or connectors in the cruise control circuit as needed.
  5. Clear the DTC from the vehicle's computer using a diagnostic scan tool and test the cruise control system to ensure proper functionality.

Cost to Fix B3794 GMC

The cost of repairing a Cruise Control Function Request Circuit issue can vary depending on the specific cause of the problem and the cost of parts and labor. On average, the repair for this issue can range from $150 to $500, including parts and labor. However, it is essential to note that the actual cost may be higher or lower based on the vehicle's make and model, the location of the repair shop, and any additional diagnostic or repair services required. It is recommended to consult with a qualified mechanic or auto repair shop to obtain an accurate estimate for addressing the B3794 DTC on a GMC vehicle.

Need more information about the B3794 GMC code?

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

Need Help with the Code?

Get the B3794 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 GMC Code

1. What does the OBDII code B3794 mean on a GMC?

The B3794 code indicates an issue with the Cruise Control Function Request Circuit, which may prevent the cruise control system from operating properly.

2. What are the common symptoms of the B3794 code?

Symptoms may include the cruise control not engaging, the cruise control light not illuminating, or erratic cruise control behavior.

3. What causes the B3794 code to appear on a GMC vehicle?

Common causes include a faulty cruise control switch, damaged wiring or connectors in the circuit, a malfunctioning body control module (BCM), or electrical shorts.

4. Can the B3794 code affect other vehicle systems?

While primarily affecting the cruise control system, it may indirectly impact driver convenience or safety if the cruise control cannot be used.

5. How do you diagnose the B3794 code?

Diagnosis involves inspecting the cruise control switch, checking for damaged wiring or loose connections, and scanning the body control module for additional codes or faults.

6. Is it safe to drive with the B3794 code active?

Yes, the vehicle is generally safe to drive, but you won’t be able to use cruise control until the issue is repaired.

7. How can I fix the B3794 code on my GMC?

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

8. How much does it cost to fix the B3794 code?

Repair costs can range from $100 to $500, depending on whether the issue is a simple wiring repair or a more complex component replacement.

9. Can a blown fuse cause the B3794 code?

Yes, a blown fuse in the cruise control circuit can trigger this code, so checking fuses is a good first step.

10. Can I clear the B3794 code without fixing the issue?

Clearing the code without addressing the root cause may temporarily remove it, but the issue will likely return until proper repairs are made.

Discuss the causes and fixes for B3794 GMC OBDII Code

Submit a New Comment

Code B3794 GMC comments

No comments found for this page.