B0780 2017 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 2017 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 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code B0780 on a 2017 GMC Sierra related to the Four Wheel Drive Low Range Indicator Circuit?
- The common symptoms include the four-wheel-drive low range indicator not functioning properly or staying illuminated when not engaged.
2. What are the possible causes of OBDII code B0780 on a 2017 GMC Sierra?
- The possible causes could be a faulty low range indicator switch, damaged wiring or connectors in the circuit, or a malfunctioning control module.
3. How can I diagnose the issue causing OBDII code B0780 on my 2017 GMC Sierra?
- To diagnose the issue, you can start by visually inspecting the wiring and connectors related to the low range indicator circuit. Testing the low range indicator switch and checking for any fault codes in the control module can also help pinpoint the problem.
4. Can I still drive my 2017 GMC Sierra with OBDII code B0780 present?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure the proper functioning of the four-wheel-drive low range indicator.
5. What are some repair tips for fixing OBDII code B0780 on a 2017 GMC Sierra?
- Repair tips may include checking and replacing the low range indicator switch if necessary, repairing any damaged wiring or connectors, and resetting the control module after making the repairs.
6. Is it possible to reset OBDII code B0780 on a 2017 GMC Sierra without fixing the underlying issue?
- While you can clear the code temporarily, it is important to address the root cause of the problem to prevent the code from reoccurring.
7. How much does it typically cost to repair OBDII code B0780 on a 2017 GMC Sierra?
- The cost of repair can vary depending on the specific issue causing the code, but it may involve replacing the low range indicator switch, repairing wiring, or addressing control module issues.
8. Can extreme weather conditions affect the Four Wheel Drive Low Range Indicator Circuit and trigger OBDII code B0780 on a 2017 GMC Sierra?
- Yes, extreme weather conditions such as moisture or extreme temperatures can sometimes lead to electrical issues in the circuit, triggering the OBDII code B0780.
9. Are there any preventive maintenance steps I can take to avoid OBDII code B0780 on my 2017 GMC Sierra?
- Regularly checking and maintaining the four-wheel-drive system, including the low range indicator circuit, can help prevent issues that may trigger OBDII code B0780.
10. How long does it typically take to repair OBDII code B0780 on a 2017 GMC Sierra?
- The repair time can vary depending on the exact cause of the issue, but it may take a few hours to a full day to diagnose and fix the problem related to the Four Wheel Drive Low Range Indicator Circuit.
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