P0977 2016 GMC Sierra Code - Shift Solenoid 'B' Open Or Short To Power
Quick Answer
The shift solenoid 2 is part of the control solenoid valve assembly which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0977 2016 GMC Sierra indicates Shift Solenoid 'B' Open Or Short To Power.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0977 2016 GMC Sierra Description
What are the Possible Causes of the DTC P0977 2016 GMC Sierra?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Transmission Control Solenoid Valve
- Transmission Control Solenoid Valve harness is open or shorted
- Transmission Control Solenoid Valve circuit poor electrical connection
How to Fix the DTC P0977 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 P0977 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 P0977 2016 GMC Sierra code?
Need more information on how to fix the P0977 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0977 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0977 2016 GMC Sierra Code
What does the OBDII code P0977 mean for a 2016 GMC Sierra?
P0977 indicates an issue with the Shift Solenoid 'B,' specifically an open circuit or short to power in the solenoid's electrical system.
What are common symptoms of code P0977 in a 2016 GMC Sierra?
Symptoms may include harsh or delayed shifting, transmission slipping, failure to shift gears, or the illumination of the check engine light.
What causes the P0977 code in a 2016 GMC Sierra?
Common causes include a faulty shift solenoid, damaged wiring or connectors, short circuits, or issues with the transmission control module (TCM).
Can driving with code P0977 damage my 2016 GMC Sierra?
Driving with this code may cause further damage to the transmission or create unsafe driving conditions due to erratic shifting. It’s best to address the issue promptly.
How do you diagnose the P0977 code in a 2016 GMC Sierra?
Diagnosis involves scanning for codes, inspecting wiring and connectors for damage, testing the shift solenoid for functionality, and checking the transmission fluid condition.
Can I fix the P0977 code myself on a 2016 GMC Sierra?
If you are comfortable with automotive repairs, you can inspect wiring, replace the solenoid, or check transmission fluid. However, complex issues may require professional assistance.
How much does it cost to repair code P0977 on a 2016 GMC Sierra?
Repairs can range from $150-$500 depending on whether you need to replace the solenoid, repair wiring, or perform advanced diagnostics.
Does low transmission fluid cause the P0977 code on a 2016 GMC Sierra?
Low or contaminated transmission fluid can contribute to solenoid issues, though it’s not the sole cause of the code.
How can I prevent code P0977 from occurring again?
Regular maintenance, including transmission fluid checks and inspections of electrical wiring, can help prevent issues with shift solenoids.
What happens if code P0977 is ignored on a 2016 GMC Sierra?
Ignoring the code may lead to worsening transmission performance, higher repair costs, or potential transmission failure.
Discuss the causes and fixes for P0977 2016 GMC Sierra OBDII Code
Code P0977 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.
