2004 Chevrolet Silverado 2500 HD
Asked by Visitor in Rangely, CO on March 14, 2017
truck keeps showing p0717 code and im not to sure where the turbine/input speed sensor is at
2 replies Report
usually on the transmission
Hello,
If you can provide us with your engine size, or transmission code, I can determine the location.
Most
of the engines use the same transmission, however, since you have the 2500HD model, there is a great chance this is a diesel truck, so I'll need that determined.
The VSS in your Silverado provides crucial information for the ECM to properly balance and control several engine functions.
This article applies to the Chevrolet Silverado GMT800 (1999-2006).
A vehicle speed sensor (VSS) transmits the transfer case, transaxle, and/or wheel speeds to the truck's electronic control module (ECM). The on-board computer then uses this information to alter various engine and transmission functions, such as ignition timing, air-to-fuel mixture, and transmission shift points.
If your Silverado's brakes are stiffer than normal, the transmission is slow to engage, the overdrive light blinks on and off, the speedometer stops working or behaves erratically, or the check engine light turns on, then the vehicle speed sensor (VSS) may have stopped working.
You can make sure that the VSS is the root cause of these symptoms by pulling your truck's trouble codes. Auto shops offer to pull trouble codes for free, or if you have an OBD scan tool, then you can do it yourself. Once you've made sure the VSS needs a replacement, follow the steps below to do it yourself.
Materials Needed
- Replacement 4WD VSS
- 19mm wrench
Raising your truck is not necessary to complete this DIY job, but you can do so for extra work space. Follow the link below to learn how to properly jack up your Chevrolet Silverado.
(Related Article: How to Jack Up Your Truck - ChevroletForum.com)
Step 1 – Remove the old VSS
- The VSS is located on the front passenger's side of the transfer case.
- Pull back on the metal clip as well as the black wire harness connector, and then pull it straight out.
- Use a 19mm wrench to loosen the VSS.
- Unscrew and remove the VSS by hand.
- Then, remove the old O-ring inside the VSS port.
Step 2 – Install the new VSS
- Thread in the new VSS by hand. A new O-ring should already be attached to the VSS.
- Use the 19mm wrench to tighten the VSS to a snug fit.
- Plug in the wire harness connector to the VSS, and make sure you hear the clip snap into place.
Featured Video: How to Install 4WD Speed Sensor
Related Discussion and Site
- How Serious is it When the VSS Wire is Cut? - ChevroletForum.com
How to Tell if You Have a Faulty Engine Speed Sensor - CarsDirect.com
The 2004 Chevy Silverado speed sensor is located on the right side near the rear of the transmission. The transmission speed sensors or vehicle speed sensors (VSS) are used to calculate the gear ratio of the transmission to determine the vehicle's speed and ensure proper shifting. Some symptoms of a bad or failing speed VSS is harsh or improper shifting. Without a valid speed signal from these sensors, the PCM will not be able to correctly control the shifting of gears within the transmission. Your cruise control may not work. You may also see Your check engine light on.
On the tail of the transmission, I've got a 04 Silverado 5.3 extended cab and it's on the passenger side, hope that helps
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David B. April 9, 2020
The speed sensor in a 2004 chevy silverado is located on the wheel hub assembly.
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