evo sensor

Rich S · February 16, 2006

Can you see this sensor without removing anything?

sgiangregorio · February 16, 2006

Yes. It's under the dash, where the upper shaft (steering column) meets the intermediate. It's enclosed in the white donut looking thingie. I will be posted a pic later on.

sgiangregorio · February 16, 2006

Here are the pics I promised. This is for a 2002 Tahoe, NBS. Not sure if it's changed at all over the years.

The first is a close up of the EVO sensor itself, and the cover you have to remove to get it out of the case (which stays on the upper shaft). The sensor is inside the case.

This pic shows the sensor and the cover.

This pic shows the case, which the sensor is inside, on the shaft. You don't remove this.

This pic shows the sensor in the case all installed with the wires hooked up.

I did "service" it, I guess. I couldn't open it, so I just sprayed it down with WD40, spun it all around a few times and tried to get some in a little access hole I saw. Then I wiped it down and reinstalled. It did make a difference though, my steering "feel" came back. Much less assist at certain times, I didn't feel all over the road. Next time I do an online parts order, I'll replace it though. It's easy enough to disconnect the intermediate steering shaft to get it off.

97chevy350 · February 16, 2006

Your lucky, on the OBS the wiring harness is not so conveniently located, the wires run from the sensor to a connector ontop of hte steerig shaft and is wrapped in foam tape which is not easy to get apart or get your fingers in there.

sgiangregorio · February 16, 2006

So the sensor is different then. The part in my pic, were you able to get it apart at all? I'm going to replace it when I order parts next.

nardeezy · July 17, 2006

Here are the pics I promised. This is for a 2002 Tahoe, NBS. Not sure if it's changed at all over the years.

The first is a close up of the EVO sensor itself, and the cover you have to remove to get it out of the case (which stays on the upper shaft). The sensor is inside the case.

This pic shows the sensor and the cover.

This pic shows the case, which the sensor is inside, on the shaft. You don't remove this.

This pic shows the sensor in the case all installed with the wires hooked up.

I did "service" it, I guess. I couldn't open it, so I just sprayed it down with WD40, spun it all around a few times and tried to get some in a little access hole I saw. Then I wiped it down and reinstalled. It did make a difference though, my steering "feel" came back. Much less assist at certain times, I didn't feel all over the road. Next time I do an online parts order, I'll replace it though. It's easy enough to disconnect the intermediate steering shaft to get it off.

<{POST_SNAPBACK}>

Is the "service" or replacement of this sensor difficult. I looked under the dashboard and I saw the sensor. How hard would it be to do this myself, what are the steps?

nardeezy · July 17, 2006

Here are the pics I promised. This is for a 2002 Tahoe, NBS. Not sure if it's changed at all over the years.

The first is a close up of the EVO sensor itself, and the cover you have to remove to get it out of the case (which stays on the upper shaft). The sensor is inside the case.

This pic shows the sensor and the cover.

This pic shows the case, which the sensor is inside, on the shaft. You don't remove this.

This pic shows the sensor in the case all installed with the wires hooked up.

I did "service" it, I guess. I couldn't open it, so I just sprayed it down with WD40, spun it all around a few times and tried to get some in a little access hole I saw. Then I wiped it down and reinstalled. It did make a difference though, my steering "feel" came back. Much less assist at certain times, I didn't feel all over the road. Next time I do an online parts order, I'll replace it though. It's easy enough to disconnect the intermediate steering shaft to get it off.

<{POST_SNAPBACK}>

What are thes steps to either replacing or servicing this sensor? I think I have the same problem with my steering but am not sure.

sgiangregorio · July 18, 2006

What are thes steps to either replacing or servicing this sensor? I think I have the same problem with my steering but am not sure.

You have to disconnect the intermediate steering shaft under the dash to get it off. Have you done that before? If you do replace the sensor, or just service it, be sure to grease the steering shaft while you have it disconnected. You only have to remove one more bolt under the hood to get the shaft out.

But basically, once you get the shaft disconnected, first, disconnect the wires that connect to the sensor. Then, that plastic ring has to be removed. It snaps out. Notice the clips that hold it in place. After that, just remove the sensor by slowly pulling down on it to remove it from the housing. Pull it even and straight as it's a perfect fit. Reverse to reinstall.

I would recommend replacing it if you do this. I didn't have one handy, but since I had the steering shaft out, I just cleaned it with WD40 and reinstalled it. I'd still like to replace mine.