Speedometer is going to fast - 2004 Buick LeSabre

There are a couple of possibilities.

The new sensor is faulty as well.

A bad connection on the speedometer/dash cluster.

A GPS unit will tell your speed as will the phone App 'Waze'.

Check your fuses. Going faster never fixes any problems that I know of...

It's probably your speed sensors or your whole speedometer cluster

Find one of those radar displays that sit on the roadside and tell you how fast you're going. Most likely your GPS is the one that's off, because it has to average and estimate your speed, wheras the vehicle's speedometer should be good from the factory.

The speedometer cable needs to be oiled it is hanging inside of housing and when it comes loose it makes the speedometer jump up and down from cable hanging up inside of housing.

in fact it should read slow not fast with 10.5 r15 s on. if you go to any reputable instrument service they will be able to sort it out for you ,no hassles. "youdoit"

the speed sensor going into the transmission

try looking at the book theres a cable from the transmit ion to the speedometer and it could be a bad connection or theres a gear in you're trans that spins and tells how fast you're going sometime those go out haven't had that problem yet but i built my truck from the ground up

you will need a new gauge cluster very typical for this vehicle it will run you around $230.00

bad speed senor on trans