AutoCodes – Chevrolet – B0785 2018 Chevrolet Silverado

B0785 2018 Chevrolet Silverado 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 Chevrolet Silverado 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.
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Code Popularity 274
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 18, 2024
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Code B0785 2018 Chevrolet Silverado Description

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. The indicator dimming control circuit is the LED feed circuit and continuously supplies B+ to the 2WD HI, 4WD Auto, 4WD HI, and 4WD LO LEDs. When the 2WD HI mode has been selected by the driver, the Transfer Case Shift Control Module (TCCM) provides a ground through the 2WD HI indicator control circuit illuminating the LED.
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.
OBDII Code B0785 2018 Chevrolet Silverado - Two Wheel Drive High Range Indicator Circuit - AutoCodes.com
B0785 2018 Chevrolet Silverado Code - Two Wheel Drive High Range Indicator Circuit

What are the Possible Causes of the DTC B0785 2018 Chevrolet Silverado?

  • 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 Chevrolet Silverado?

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 Chevrolet Silverado 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 Chevrolet Silverado code?

Need more information on how to fix the B0785 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0785 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0785 2018 Chevrolet Silverado Code

1. What are common symptoms of OBDII code B0785 in a 2018 Chevrolet Silverado?

- Common symptoms include the two-wheel drive high range indicator not functioning properly or illuminating on the dashboard.

2. What can cause the OBDII code B0785 to trigger in a 2018 Chevrolet Silverado?

- The code may be triggered by a malfunction in the two-wheel drive high range indicator circuit, possibly due to a faulty indicator switch or wiring issue.

3. How serious is the OBDII code B0785 in a 2018 Chevrolet Silverado?

- The code is typically not critical to the vehicle's immediate operation but may affect the driver's ability to engage the two-wheel drive high range properly.

4. Can I continue driving my 2018 Chevrolet Silverado with the B0785 OBDII code present?

- It is generally safe to continue driving the vehicle with this code, but it is recommended to have the issue diagnosed and repaired at your earliest convenience.

5. How can I diagnose the cause of OBDII code B0785 in my 2018 Chevrolet Silverado?

- Diagnosing the issue may involve checking the two-wheel drive high range indicator switch, inspecting the wiring for any damage, and testing the circuit for proper functionality.

6. Is it possible to reset the OBDII code B0785 in a 2018 Chevrolet Silverado without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is important to address the root cause to prevent the code from reoccurring.

7. Are there any DIY repair tips for fixing the OBDII code B0785 in a 2018 Chevrolet Silverado?

- DIY repair tips may include checking and cleaning the indicator switch connections, inspecting the wiring for any visible damage, and ensuring all connections are secure.

8. How much does it typically cost to repair the OBDII code B0785 in a 2018 Chevrolet Silverado?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing a faulty indicator switch or repairing damaged wiring, which could range from $100 to $300 or more.

9. Can a local mechanic or dealership help me fix the OBDII code B0785 in my 2018 Chevrolet Silverado?

- Yes, a qualified mechanic or dealership should be able to diagnose and repair the issue related to the two-wheel drive high range indicator circuit in your Silverado.

10. How can I prevent the OBDII code B0785 from occurring again in my 2018 Chevrolet Silverado?

- Regularly inspecting and maintaining the two-wheel drive high range indicator system, including checking for any loose connections or damaged wiring, can help prevent the code from reoccurring.

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