My cateye MC100W does not register anything in odometer, all other functions are ok

Hello BDG, The answer is no. If the VSS fails on your 97 Chevy, you will lose both speedometer and odometer functions. If your speedo is still working and your odometer is not, you have a broke odometer. This is a common failure with a lot of the older vehicles that were fitted with the mechanical odometer registers. Feel free to contact Kincer's Service for a repair salution.
GM Instrument Cluster Speedometer Repair Service

http://www.cateye.com/pdf/en/ccpdf/MC100W%20v3_ENG.pdf

Cateye might have it, ya think?

http://www.cateye.com/en/

Yes to both.

Instructions:
http://www.cateye.co.jp/global_site/pdf/qsm/rd300w_qsm_w_v1.pdf


Functions:
Current Speed
Maximum Speed
Average Speed
Odometer
Trip Distance
Elapsed Time
Clock

Specifications
Fits almost any handlebar or stem: 22-31.8 mm
Fits almost any fork: 11-55mm
Batteries: CR2032 x 2 (1 each for head unit and sensor)
Front fork speed sensor

Well, it IS wireless so it need ssome good juice and line of site from the sensor to the receiver to work.

Take the unit off the handlbar mount and hold it close to the transmitter while you move the wheel magnet past the sensor.

If it starts to work begin moving the computer farther away toward your handlebar mount and figure out where it dies and why. Some units have distance specs that must be adhered to.

http://www.cateye.com/sites/cateye/upload/manuals/en/VL510-810_ENG+v3.pdf It can be switched between displaying MPH or KPH.

Well, i gotta tell ya.. i have the exact same issue. the odometer is the only thing ... well was... now the speedo wont register till i get down the road a ways.

replace the battery

On both the sensor stick (which goes on the fork) and the magnet (which goes on the spokes) there is a center line engraved on each. The centerlines on both have to cross each other at a distance of about 1/4" to register on the odometer.

This is a very strange problem indeed. I'm guessing you are doing this test by just spinning the wheel, not actually riding. In any case, make sure the sensor itself is not loose. This could be moving from the vibration at higher speeds. Thanks