P0717 on GMC: How to Diagnose & Fix
Input/Turbine Speed Sensor Circuit No Signal
1 GMC model · 1 documented issue · 1 critical · $500-$3,500 repair
P0717 on GMC by model: symptoms, diagnosis and fix
The Allison 1000 transmission paired with the Duramax diesel in 2008-2015 Sierra 3500HD trucks has a high failure rate for the Transmission Control Module (TCM). A class action suit was filed covering these years. Additional issues include input/output speed sensor failures causing no-forward/reverse conditions, and certain 2012 trucks built with incorrect thrust bearings.
Common Symptoms
- Intermittent no forward or reverse movement
- Flashing PRNDL display
- Range Shift Inhibited message
- Harsh or delayed shifts
- Transmission noise or whine
- Check engine light with transmission codes
How to Fix
Sources for this issue (1)
P0717 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0717 mean on a GMC?
P0717 stands for "Input/Turbine Speed Sensor Circuit No Signal." This transmission code means the computer is receiving no signal from the input/turbine speed sensor, which measures how fast the transmission's input shaft (turbine side of the torque converter) is spinning. The computer compares this against engine and output speeds to control shifts and torque converter lockup. With no signal, it can't manage shifting properly, so you may get harsh or erratic shifts, no torque converter lockup, or limp mode. It is a no-signal electrical fault pointing to the sensor or its circuit. On GMC it is documented across 1 model: Sierra 3500HD.
What are the most common causes of P0717?
The most common causes of P0717 are: Failed input/turbine speed sensor, Open or shorted wiring to the sensor, Corroded or loose sensor connector, Damaged reluctor/tone ring on the input shaft, Metal debris on the sensor tip from internal wear, Poor ground or reference voltage to the sensor, Faulty transmission control module (less common). The specific cause varies by vehicle.
How much does it cost to fix P0717 on a GMC?
Published repair estimates on GMC range from $500 to $3,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0717 on a different make?
View P0717 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.