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vehicle speed sensor 1999 seville


steve6

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The sensor is on top of the right half-axle housing. If you turn the steering wheel all the way to the left, you can get at it with a creeper without jacking the car up or using a lift, if you are limber. It's held on by one bolt and has one two-wire connector. Be sure the connector contacts are clean.

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Steve, see this thread, Mike

Vehicle Speed Sensor / Speedometer

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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It's a metric hex bolt. I would try a 3/8" drive ratchet with a 10 mm socket. Follow the link that Bodybyfisher gave to a previous thread; there is a 3D diagram of the transmission that shows the VSS and its retaining bolt very clearly. It's inboard (toward the center of the car) and adjacent to the VSS.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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it must have had some kind of dust cover on it, eventually it poped off and just a 10 mm bolt at that point. It was sticking up about an inch and a half above the sensor casing, and not knowing what it was makes it pretty decieving.

all replaced now, hopefully that fixes it.

thanks

:D

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As you can see, another member in the thread I linked you to thought replacing that sensor was tricky... I have never replaced that sensor, but it seems that it is in fact a little tricky What were your symptoms? Did this fix the problem?

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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As you can see, another member in the thread I linked you to thought replacing that sensor was tricky... I have never replaced that sensor, but it seems that it is in fact a little tricky What were your symptoms? Did this fix the problem?

Cruise control was kicking off on me, it was leaving a code (would have to look it up if you want to know the code). And the speedo would jump around, 110..115...105..120 etc. Not all the time, very randomly for the most part, but almost guaranteed on a long ride where I wanted to use cruise, sometimes it would trigger the CEL.... Its all in now, but I have not used the car enough to tell, I'm sure it will fix it though.

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  • 2 weeks later...

Is the speedometer still jumping around also? That seems fixed right? Check the adjustment of your brake switch to see if its poorly adjusted and disengaging the cruise control. As you know tapping the brake disengages the cruise control

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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