How to change a speed sensor on 2004 chevy surban

This should help

C0237? That is an erratic rear speed sensor fault. Is your abs light on? The speed sensor may be unplugged, wire harness damaged, sensor may be failing. The tps is part of the throttle motor assembly. Very expensive, but very easy to change.

Speed sensor for the ABS system or for the speedometer?

If the speedometer and it is four wheel drive than the speed sensor will be in the rear housing of the transfer case.

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(440) Automatic Transmission Input Shaft Speed (A/T ISS) Sensor Assembly

the abs speed sensor is part of the hub, you have to replace the hole hub

check the transmission fluid while it is running . if it is burned and smells bad dark brown. then you may have to change the fluid/filter.

There is no MAF sensor. The MAP sensor is on the drivers rear of the intake plenum on top. Its the only sensor on top of the plenum. Speed density, not sure what you are talking about? Lmk

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disconnect the cable at the transmission and at the speedometer tape the new cable to the old one at the transmission and pull the new one through the firewall and re hook

For the stalling issue, the throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean.
The dead speedometer could be a bad stepper motor in the instrument cluster or a bad speed sensor on the transmission. If the cruise control is not working, the problem is most likely the speed sensor.

rotate ignition switch from off to on three times. With ignition in on position not running press gas pedal to floor three times. Turn ignition off then start vehicle.