Hy afther buying a Picoscope in 2016 I finaly had to use it for the first time. What a device!

On a y 2k Chevy express the speedo shows 60 mile/h while doing 60km/h on the same time the needle goes up and down. So there is no clear speed signal. everything points in the speed sensors direction and the vehicle has all the signs. ABS light goes on from time to time the gear shift is not good no...