B0780 2018 GMC Sierra Code - Four Wheel Drive Low Range Indicator Circuit
Quick Answer
The Four-Wheel Drive (4WD) Low Range (LO) indicator circuit consists of a Light Emitting Diode (LED) feed circuit, a LED, and a LED control circuit. Common causes include Faulty Transfer Case Select Switch, Transfer Case Select Switch harness is open or shorted, Transfer Case Select Switch circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- B0780 2018 GMC Sierra indicates Four Wheel Drive Low Range Indicator Circuit.
- Common causes
- Common causes include Faulty Transfer Case Select Switch, Transfer Case Select Switch harness is open or shorted, Transfer Case Select Switch circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code B0780 2018 GMC Sierra Description
The TCCM tests the 4WD LO indicator circuit for unexpected voltage by monitoring the B+ supplied by the Body Control Module (BCM) on the indicator dimming control circuit by grounding the 4WD LO indicator control circuit for 2 seconds during the Bulb Test at key ON.
What are the Possible Causes of the DTC B0780 2018 GMC Sierra?
- Faulty Transfer Case Select Switch
- Transfer Case Select Switch harness is open or shorted
- Transfer Case Select Switch circuit poor electrical connection
- Faulty Transfer Case Shift Control Module (TCCM)
How to Fix the DTC B0780 2018 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 B0780 2018 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 B0780 2018 GMC Sierra Code
1. What are the common symptoms of OBDII code B0780 in a 2018 GMC Sierra?
The common symptoms of OBDII code B0780 in a 2018 GMC Sierra include the Four Wheel Drive Low Range indicator not functioning properly or illuminating intermittently.
2. What could be causing the OBDII code B0780 in a 2018 GMC Sierra?
The OBDII code B0780 in a 2018 GMC Sierra is typically caused by issues with the Four Wheel Drive Low Range indicator circuit, such as a faulty indicator switch, wiring problems, or a defective control module.
3. How can I diagnose the OBDII code B0780 in my 2018 GMC Sierra?
Diagnosing the OBDII code B0780 in a 2018 GMC Sierra involves inspecting the Four Wheel Drive Low Range indicator circuit, checking the indicator switch, testing the wiring for continuity, and scanning the vehicle's computer for fault codes.
4. Can I continue driving my 2018 GMC Sierra with the OBDII code B0780?
It is not recommended to ignore the OBDII code B0780 in a 2018 GMC Sierra, as it indicates an issue with the Four Wheel Drive Low Range indicator circuit, which could affect the vehicle's drivability and safety.
5. How do I repair OBDII code B0780 in my 2018 GMC Sierra?
To repair OBDII code B0780 in a 2018 GMC Sierra, you may need to replace the faulty Four Wheel Drive Low Range indicator switch, repair any damaged wiring, or reprogram the control module as needed.
6. Is the repair for OBDII code B0780 in a 2018 GMC Sierra costly?
The cost of repairing OBDII code B0780 in a 2018 GMC Sierra can vary depending on the specific issue causing the code, but it is recommended to address the problem promptly to prevent further damage.
7. Can I reset the OBDII code B0780 in my 2018 GMC Sierra using a scan tool?
Resetting the OBDII code B0780 in a 2018 GMC Sierra using a scan tool may temporarily clear the code, but it is essential to diagnose and repair the underlying issue to prevent the code from reoccurring.
8. Will OBDII code B0780 in my 2018 GMC Sierra affect the vehicle's performance?
While OBDII code B0780 in a 2018 GMC Sierra may not directly impact the vehicle's performance, it is crucial to address the issue promptly to ensure the proper functioning of the Four Wheel Drive Low Range indicator.
9. How long does it typically take to repair OBDII code B0780 in a 2018 GMC Sierra?
The time required to repair OBDII code B0780 in a 2018 GMC Sierra can vary depending on the specific cause of the issue, but it is advisable to consult a professional technician for an accurate diagnosis and repair estimate.
10. Can I prevent OBDII code B0780 from occurring in my 2018 GMC Sierra?
Regular maintenance and inspections of the Four Wheel Drive Low Range indicator circuit in a 2018 GMC Sierra can help prevent issues that may trigger OBDII code B0780, ensuring the proper functioning of the system.
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