B3794 GMC Code - Cruise Control Function Request 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
- B3794 GMC indicates Cruise Control Function Request 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 B3794 GMC Description
What are the Possible Causes of the DTC B3794 GMC?
- 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 B3794 GMC?
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 B3794 GMC 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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Information for Specific GMC Models
- B3794 2014 GMC Sierra — Cruise Control Function Request Circuit
- B3794:08 2014 GMC Sierra — Cruise Control Function Request Circuit
- B3794:61 2014 GMC Sierra — Cruise Control Function Request Circuit
- B3794 2015 GMC Sierra — Cruise Control Function Request Circuit
- B3794:08 2015 GMC Sierra — Cruise Control Function Request Circuit
- B3794:61 2015 GMC Sierra — Cruise Control Function Request Circuit
- B3794 2016 GMC Sierra — Cruise Control Function Request Circuit
- B3794:08 2016 GMC Sierra — Cruise Control Function Request Circuit
- B3794:61 2016 GMC Sierra — Cruise Control Function Request Circuit
- B3794 2017 GMC Sierra — Cruise Control Function Request Circuit
- B3794:08 2017 GMC Sierra — Cruise Control Function Request Circuit
- B3794:61 2017 GMC Sierra — Cruise Control Function Request Circuit
- B3794 2018 GMC Sierra — Cruise Control Function Request Circuit
- B3794:08 2018 GMC Sierra — Cruise Control Function Request Circuit
- B3794:61 2018 GMC Sierra — Cruise Control Function Request Circuit
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.
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