P0717 on GMC
Input/Turbine Speed Sensor Circuit No Signal
P0717 on GMC vehicles indicates input/turbine speed sensor circuit no signal. Au7o has documented this code across 1 GMC model — most commonly on Sierra 3500HD. 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. Typical repair costs on GMC range from $500 to $3,500, depending on the specific model and root cause.
Common Causes of P0717
- •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)
P0717 on GMC by Model
GMC Sierra 3500HD(1 issue)
- Allison 1000 Transmission Control Module and Sensor Failures2008-2019
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.
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What does P0717 mean on 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 specifically, this code is documented across 1 model.
What causes P0717 on GMC vehicles?▼
Common causes on GMC: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0717 on a GMC?▼
Repair costs on GMC range from $500 to $3,500, depending on the specific model and root cause.
Which GMC models have P0717 documented?▼
Au7o has documented P0717 on 1 GMC model: Sierra 3500HD.