B0770 2017 GMC Sierra Code - All Wheel Drive Indicator Circuit
Quick Answer
The All Wheel Drive (AWD/4WD Auto) 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
- B0770 2017 GMC Sierra indicates All Wheel Drive 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 B0770 2017 GMC Sierra Description
The TCCM tests the AWD indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the indicator dimming control circuit by grounding the AWD indicator control circuit for 2 seconds during the Bulb Test at key ON.
What are the Possible Causes of the DTC B0770 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 B0770 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 B0770 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.
Need more information about the B0770 2017 GMC Sierra code?
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Frequently Asked Questions about B0770 2017 GMC Sierra Code
1. What are common symptoms of OBDII code B0770 on a 2017 GMC Sierra related to the All Wheel Drive Indicator Circuit?
The common symptoms include the all-wheel drive indicator light not illuminating or functioning properly on the dashboard.
2. What are the possible causes of OBDII code B0770 on a 2017 GMC Sierra?
Potential causes of this code may include a faulty all-wheel drive indicator switch, damaged wiring or connectors in the indicator circuit, or a malfunctioning control module.
3. How can I diagnose the issue causing OBDII code B0770 on my 2017 GMC Sierra?
To diagnose the issue, you can start by inspecting the all-wheel drive indicator switch, checking for any visible damage to the wiring and connectors, and using a diagnostic scanner to read the specific error codes.
4. Can OBDII code B0770 on a 2017 GMC Sierra be fixed without professional help?
Depending on your level of automotive expertise, you may be able to fix this issue yourself by replacing the faulty components, such as the indicator switch or repairing damaged wiring. However, seeking professional help is recommended for accurate diagnosis and repair.
5. How important is it to address OBDII code B0770 on a 2017 GMC Sierra promptly?
It is important to address this code promptly as it indicates a potential issue with the all-wheel drive indicator circuit, which could affect the vehicle's all-wheel drive system's performance and functionality.
6. Are there any DIY repair tips for fixing OBDII code B0770 on a 2017 GMC Sierra?
If you are comfortable with DIY repairs, you can start by checking and cleaning the connections of the indicator switch, ensuring proper wiring connections, and testing the circuit for continuity using a multimeter.
7. Is it safe to continue driving my 2017 GMC Sierra with OBDII code B0770 present?
While the vehicle may still be operable with this code present, it is recommended to address the issue promptly to prevent any potential further damage to the all-wheel drive system.
8. How much should I expect to pay for professional repairs related to OBDII code B0770 on a 2017 GMC Sierra?
The cost of professional repairs for this code can vary depending on the specific cause of the issue, location, and labor rates. It is advisable to obtain quotes from reputable auto repair shops for an accurate estimate.
9. Can resetting the OBDII system clear OBDII code B0770 on a 2017 GMC Sierra?
Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the B0770 code is not resolved, it is likely to reappear. It is important to diagnose and fix the root cause of the problem.
10. Will OBDII code B0770 on a 2017 GMC Sierra cause the vehicle to fail an emissions test?
The B0770 code itself may not directly cause the vehicle to fail an emissions test. However, it is essential to address any OBDII codes to ensure the vehicle is running optimally and meets emissions standards.
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