B0785 2018 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 2018 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 2018 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 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 B0785 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 B0785 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.
Need more information about the B0785 2018 GMC Sierra code?
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Frequently Asked Questions about B0785 2018 GMC Sierra Code
1. What are the common symptoms of OBDII code B0785 in a 2018 GMC Sierra two-wheel-drive model?
- The common symptoms include the high range indicator not working properly or displaying incorrect information on the dashboard.
2. What are the possible causes of the Two Wheel Drive High Range Indicator Circuit issue in a 2018 GMC Sierra?
- The causes can range from a faulty high range indicator switch, wiring issues, a defective indicator circuit, or a malfunctioning control module.
3. How can I diagnose the OBDII code B0785 in my 2018 GMC Sierra?
- You can start by visually inspecting the indicator switch and related wiring. Using a multimeter, check for continuity and voltage in the circuit to pinpoint the issue.
4. Can I drive my 2018 GMC Sierra with the B0785 code without fixing it immediately?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid potential confusion or further electrical problems.
5. Are there any simple repairs I can attempt to fix the Two Wheel Drive High Range Indicator Circuit problem in my GMC Sierra?
- Yes, you can start by checking and cleaning the connections of the indicator switch, as sometimes poor connections can cause this issue.
6. Is it necessary to visit a dealership or mechanic to fix the B0785 code in a 2018 GMC Sierra?
- Depending on your comfort level with automotive repairs, you may be able to address this issue yourself. However, if you are unsure or inexperienced, seeking professional help is recommended.
7. How much can I expect to pay for repairing the Two Wheel Drive High Range Indicator Circuit issue in a 2018 GMC Sierra?
- The cost of repair can vary based on the specific problem and whether you choose to fix it yourself or seek professional assistance. It's advisable to get a few quotes before proceeding.
8. Will resetting the OBDII code B0785 in my 2018 GMC Sierra make the issue go away permanently?
- Resetting the code may temporarily clear the warning light, but if the root cause of the problem is not addressed, the code is likely to reappear.
9. Can extreme weather conditions affect the Two Wheel Drive High Range Indicator Circuit in a 2018 GMC Sierra?
- Yes, extreme temperatures or moisture can sometimes exacerbate electrical issues, so it's important to keep these factors in mind when diagnosing and repairing the problem.
10. How long does it typically take to fix the OBDII code B0785 in a 2018 GMC Sierra?
- The repair time can vary depending on the complexity of the issue and your experience level. It could range from a quick fix to several hours of troubleshooting and repairs.
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