B0785 2017 GMC Sierra Code - Two Wheel Drive High Range Indicator Circuit
Quick Answer
The Two Wheel Drive (2WD) High Range (HI) indicator circuit consists of a Light Emitting Diode (LED) feed circuit, an LED, and an 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
- B0785 2017 GMC Sierra indicates Two Wheel Drive High 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 B0785 2017 GMC Sierra Description
The TCCM tests the 2WD HI indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the indicator dimming control circuit by grounding the 2WD HI indicator control circuit for 2 seconds during the Bulb Test at key ON.
What are the Possible Causes of the DTC B0785 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 B0785 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 B0785 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 B0785 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code B0785 on a 2017 GMC Sierra Two Wheel Drive?
The common symptoms include the two-wheel drive high range indicator not functioning properly or illuminating on the dashboard.
2. What are the possible causes of OBDII code B0785 on a 2017 GMC Sierra Two Wheel Drive?
Possible causes include a faulty high range indicator switch, wiring issues in the circuit, or a malfunction in the instrument cluster.
3. How can I diagnose OBDII code B0785 on my 2017 GMC Sierra Two Wheel Drive?
To diagnose the issue, you can use an OBDII scanner to read the code and perform a visual inspection of the indicator switch and related wiring.
4. Can I still drive my 2017 GMC Sierra with OBDII code B0785 present?
While the vehicle may still be operational, it is recommended to address the issue promptly to prevent any further damage or safety concerns.
5. How can I repair OBDII code B0785 on my 2017 GMC Sierra Two Wheel Drive?
Repair options include replacing the high range indicator switch, repairing any damaged wiring, or addressing any issues with the instrument cluster.
6. Will resetting the OBDII code B0785 on my 2017 GMC Sierra Two Wheel Drive fix the issue?
Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code to trigger.
7. Is OBDII code B0785 on a 2017 GMC Sierra Two Wheel Drive a serious issue?
While it may not directly impact the drivability of the vehicle, it is still important to address the code to ensure all systems are functioning properly.
8. Can a DIY enthusiast repair OBDII code B0785 on a 2017 GMC Sierra Two Wheel Drive?
Depending on your skill level and access to tools, some DIY enthusiasts may be able to address the issue themselves by following repair guides or consulting with experts.
9. How much does it typically cost to repair OBDII code B0785 on a 2017 GMC Sierra Two Wheel Drive?
The cost of repair can vary based on the specific cause of the issue, but it may involve parts and labor expenses that could range from a few hundred to over a thousand dollars.
10. Will fixing OBDII code B0785 on my 2017 GMC Sierra Two Wheel Drive improve fuel efficiency or performance?
Fixing this code is more about ensuring proper functionality of the high range indicator system and may not directly impact fuel efficiency or performance.
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