I put a new speed and change sensor for my 1994 chevy silverado l

Hi Louis, The link below is a youtube video on how to change a abs speed sensor on 1997 chevy silverado....CHEERS
https://www.youtube.com/watch?v=XsAD3a80Jzs

noise greater with speed. if so try at low speed turn steering wheel from one side to other if the sound change . the wheel bearing is at cause

For complete procedure to replace rear speed sensor,click the link below and follow the procedure:---
http://repairhelpcenter.blogspot.com/2012/11/chevy-silverado-rear-speed-sensor.html
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Thanks.

You may have a wiring harness problem, I'd really suggest you stop throwing parts in this and have the dealer check the wiring harness, it is called a pin point test.

here is a link with step by step instructions. Good luck!
http://www.ehow.com/how_5745566_clean-chevy-silverado-abs-sensors.html

your truck is in limp mode,
have someone check the output and input sensors on the transmission

I had a 1994 chevy pickup that did the same thing and it turned out to be the shift solenoids. Try pulling the codes. My codes lead me straight to the problem.

Change the speed sensor on the transmission and see if the problem goes away.

Flushing the radiator, replacing the radiator cap, adding new coolant, replacing the sensors and a new thermostat solved the problem. Probably didn't need to do all of these things - but since we just purchased the truck, and given the fact that is probably hadn't been done in a while, we chose to do all of these things (which really didn't cost a whole lot), it's running like a charm now.