It is on the transmission tail shaft housing on 2-wheel drives. If it is a 4x4 then it is on the transfur case tail shaft housing.
The 2003 Trailblazer speed sensor is mounted on the transmission. It is on the passenger side of the output end.
It is behind the starter, You will have to remove starter to service it,
an 03 Chevy does not have a map it has a mass air flow mas and it is in the duct that runs from the air filter to the throttle box
How do you unplug an oxygen sensor on a 2003 Chevy Cavalier
The TSP sensor on your 2003 Chevy Tahoe is located on the back of the transmission.
How far off is it? Did you change tire/wheel size? Bad speed sensor.
location for 2003 chevy trailblazer coolant temperature sensor
how do you change the knock sensor in a 2003 Chevy silverado 5.3
where is the speed sensor located on 2003 Toyota matrix
If both the speedometer and odometer stopped working it is probably the speed sensor in the transmission gone bad. If only the speedometer quit you may have to replace the dash cluster with a reconditioned unit.
2003 chevy tahoe knock sensor
There are 4 abswheel speed sensors. One at each wheel.