B0770 2014 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 2014 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 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra code?
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Frequently Asked Questions about B0770 2014 GMC Sierra Code
1. What are common symptoms of OBDII code B0770 in a 2014 GMC Sierra related to the All Wheel Drive Indicator Circuit?
- Common symptoms include the all-wheel-drive (AWD) indicator light not illuminating or staying on constantly, indicating a potential issue with the AWD system.
2. What are possible causes of the OBDII code B0770 in a 2014 GMC Sierra?
- The code B0770 can be triggered by a faulty AWD indicator switch, damaged wiring or connectors in the AWD circuit, or a malfunction in the AWD control module.
3. How can I diagnose the OBDII code B0770 in my 2014 GMC Sierra?
- To diagnose the code B0770, you can use an OBDII scanner to retrieve the specific fault code, visually inspect the AWD indicator switch and wiring for any visible damage, and test the AWD control module.
4. Can I still drive my 2014 GMC Sierra with the OBDII code B0770 present?
- It is generally safe to drive your vehicle with the B0770 code, but it is recommended to have the issue diagnosed and repaired promptly to avoid potential AWD system malfunctions.
5. How can I repair the OBDII code B0770 in my 2014 GMC Sierra related to the All Wheel Drive Indicator Circuit?
- Repairing the B0770 code may involve replacing the faulty AWD indicator switch, repairing damaged wiring or connectors, or reprogramming the AWD control module as needed.
6. Is it possible to reset the OBDII code B0770 in a 2014 GMC Sierra without fixing the underlying issue?
- While you can temporarily clear the code with an OBDII scanner, it is not recommended as the issue will likely reoccur until the root cause is addressed.
7. Are there any DIY tips for troubleshooting the OBDII code B0770 in a 2014 GMC Sierra?
- DIY tips include checking the AWD indicator switch for proper function, inspecting the AWD circuit wiring for damage, and ensuring all connections to the AWD control module are secure.
8. Can extreme weather conditions affect the occurrence of the OBDII code B0770 in a 2014 GMC Sierra?
- Yes, extreme cold or hot weather conditions can potentially impact the AWD system components, leading to the triggering of the B0770 code. It is important to keep the AWD system well-maintained.
9. How long does it typically take to repair the OBDII code B0770 in a 2014 GMC Sierra at a professional auto repair shop?
- The repair time for the B0770 code can vary depending on the exact cause of the issue and the availability of parts. On average, it may take a few hours to a full day for diagnosis and repair.
10. Can the OBDII code B0770 in a 2014 GMC Sierra be a recurring issue after it has been repaired?
- If the root cause of the B0770 code is not properly addressed during the repair, it can potentially recur. It is crucial to ensure a thorough diagnosis and repair to prevent future occurrences.
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