B0780 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 GMC Sierra Code
1. What are common symptoms of OBDII code B0780 in a 2016 GMC Sierra?
- The most common symptom is the Four Wheel Drive Low Range indicator light staying illuminated on the dashboard when the system is not in Low Range mode.
2. What can cause the Four Wheel Drive Low Range Indicator Circuit issue in a 2016 GMC Sierra?
- Potential causes include a faulty indicator switch, wiring issues, or a malfunctioning control module related to the low range indicator.
3. How serious is the B0780 OBDII code in a 2016 GMC Sierra?
- While this code may not affect the drivability of the vehicle, it can lead to confusion about the actual operational status of the Four Wheel Drive Low Range system.
4. Can I continue driving my 2016 GMC Sierra with the Four Wheel Drive Low Range Indicator Circuit problem?
- It is generally safe to drive the vehicle with this issue, but it is recommended to have it diagnosed and repaired to ensure proper functionality of the Four Wheel Drive system.
5. How can I diagnose the B0780 code in my 2016 GMC Sierra?
- Diagnosing this code typically involves using a scan tool to check for the specific fault code, inspecting the wiring and connections related to the low range indicator circuit, and testing the indicator switch for proper operation.
6. Is it possible to repair the Four Wheel Drive Low Range Indicator Circuit issue in a 2016 GMC Sierra myself?
- Depending on your level of automotive knowledge and experience, you may be able to repair this issue yourself by replacing the faulty indicator switch or addressing any wiring issues. However, professional assistance is recommended for accurate diagnosis and repair.
7. How much does it cost to fix the B0780 OBDII code in a 2016 GMC Sierra?
- The cost of repairing this code can vary depending on the root cause of the issue. Simple fixes like replacing a switch may cost less, while complex wiring or module repairs can be more expensive. It is advisable to obtain quotes from reputable mechanics.
8. Can a faulty Four Wheel Drive Low Range Indicator Circuit impact other systems in my 2016 GMC Sierra?
- While the main impact is on the Four Wheel Drive system's indicator function, a malfunction in this circuit may potentially affect other related systems like the Four Wheel Drive control module.
9. Are there any tips to prevent the B0780 code from recurring in my 2016 GMC Sierra?
- To prevent the reoccurrence of this code, it is essential to ensure all electrical connections related to the Four Wheel Drive Low Range indicator circuit are secure and free of corrosion. Regular maintenance checks can help detect and address issues early.
10. How long does it typically take to repair the Four Wheel Drive Low Range Indicator Circuit problem in a 2016 GMC Sierra?
- The repair time can vary based on the exact cause of the issue and the complexity of the repair. Simple fixes may be completed within a few hours, while more intricate repairs could take longer, potentially requiring a day or more.
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