B0780 2015 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 2015 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 2015 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 2015 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 2015 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 2015 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 2015 GMC Sierra Code
1. What are the common symptoms of OBDII code B0780 on a 2015 GMC Sierra?
- The common symptoms include the Four Wheel Drive (4WD) Low Range indicator not functioning properly or illuminating on the dashboard.
2. What could be causing the Four Wheel Drive Low Range Indicator Circuit issue in a 2015 GMC Sierra?
- Possible causes may include a faulty 4WD Low Range switch, damaged wiring or connectors in the circuit, or a problem with the transfer case control module.
3. How can I diagnose the OBDII code B0780 on my 2015 GMC Sierra?
- You can diagnose this issue by performing a visual inspection of the 4WD Low Range indicator circuit wiring, checking the switch for proper operation, and using a diagnostic scanner to read the trouble codes.
4. Can I still drive my 2015 GMC Sierra with the OBDII code B0780 present?
- It is generally safe to drive the vehicle with this code, but it is recommended to get it diagnosed and repaired as soon as possible to avoid potential 4WD system malfunctions.
5. What are some repair tips for fixing the Four Wheel Drive Low Range Indicator Circuit issue on a 2015 GMC Sierra?
- Repair tips include checking and repairing any damaged wiring, replacing the 4WD Low Range switch if necessary, and ensuring all connections are secure and free of corrosion.
6. Is it possible to reset the OBDII code B0780 on a 2015 GMC Sierra without making any repairs?
- While clearing the code temporarily may be possible, it is important to address the underlying issue causing the code to prevent it from reoccurring.
7. How much does it typically cost to repair the Four Wheel Drive Low Range Indicator Circuit problem in a 2015 GMC Sierra?
- The cost of repairs can vary depending on the exact cause of the issue, but it may involve a few hundred dollars for parts and labor.
8. Can extreme weather conditions impact the functionality of the Four Wheel Drive Low Range Indicator Circuit on a 2015 GMC Sierra?
- Yes, extreme cold or wet conditions can sometimes exacerbate electrical issues in the circuit, leading to the malfunction of the 4WD Low Range indicator.
9. Will the OBDII code B0780 affect the overall performance of my 2015 GMC Sierra?
- While the code itself may not directly affect performance, unresolved issues with the Four Wheel Drive system can impact the vehicle's off-road capabilities and drivability in certain conditions.
10. How can I prevent the recurrence of OBDII code B0780 in the future on my 2015 GMC Sierra?
- Regularly inspecting and maintaining the 4WD system components, addressing any wiring or switch issues promptly, and following the manufacturer's recommended service schedule can help prevent the code from reappearing.
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