B0775 2016 GMC Sierra Code - Four Wheel Drive High Indicator Circuit
Quick Answer
The Four Wheel Drive HI 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
- B0775 2016 GMC Sierra indicates Four Wheel Drive High 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 B0775 2016 GMC Sierra Description
The TCCM tests the 4WD HI indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the indicator dimming control circuit by grounding the 4WD HI indicator control circuit for 2 seconds during the Bulb Test at key ON.
What are the Possible Causes of the DTC B0775 2016 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 B0775 2016 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 B0775 2016 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 B0775 2016 GMC Sierra code?
Need more information on how to fix the B0775 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B0775 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B0775 2016 GMC Sierra Code
1. What does the OBDII code B0775 mean on a 2016 GMC Sierra?
The B0775 code indicates a problem with the Four-Wheel Drive High Indicator Circuit, which controls the light on the dashboard showing when 4WD High is engaged.
2. What are the symptoms of the B0775 code on a 2016 GMC Sierra?
Common symptoms include the 4WD High indicator light not illuminating, staying on when it shouldn't, or erratic operation of the 4WD system.
3. What causes the B0775 code to appear on a 2016 GMC Sierra?
This code can be caused by a faulty Four-Wheel Drive High indicator bulb, wiring issues, a defective transfer case control module (TCCM), or a malfunctioning switch or sensor.
4. Is it safe to drive a 2016 GMC Sierra with the B0775 code?
Yes, it’s generally safe to drive, but you may experience issues engaging or confirming the engagement of 4WD High, which could be problematic in off-road or slippery conditions.
5. How can I diagnose the B0775 code on a 2016 GMC Sierra?
Diagnosis involves checking the wiring and connectors for the 4WD High indicator circuit, testing the indicator bulb, and scanning the TCCM for additional codes or faults.
6. Can a faulty transfer case control module cause the B0775 code?
Yes, a malfunctioning TCCM can cause communication issues with the 4WD High indicator circuit, triggering the B0775 code.
7. How do I fix the B0775 code on a 2016 GMC Sierra?
Repairs may include replacing a faulty indicator bulb, repairing damaged wiring or connectors, recalibrating or replacing the TCCM, or addressing issues with the 4WD switch.
8. How much does it cost to repair the B0775 code on a 2016 GMC Sierra?
The cost varies depending on the cause but can range from $50 for a bulb replacement to $500 or more if the TCCM needs replacement.
9. Can clearing the B0775 code fix the issue on a 2016 GMC Sierra?
Clearing the code may temporarily turn off the check engine light, but if the underlying issue isn’t fixed, the code will return.
10. Can a blown fuse cause the B0775 code on a 2016 GMC Sierra?
Yes, a blown fuse in the circuit powering the 4WD High indicator can cause the B0775 code. Always check fuses during diagnosis.
Discuss the causes and fixes for B0775 2016 GMC Sierra OBDII Code
Code B0775 2016 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
